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Qu Wenruo [Wed, 8 Nov 2017 00:54:25 +0000 (08:54 +0800)]
btrfs: tree-checker: Add checker for dir item
commit
ad7b0368f33cffe67fecd302028915926e50ef7e upstream.
Add checker for dir item, for key types DIR_ITEM, DIR_INDEX and
XATTR_ITEM.
This checker does comprehensive checks for:
1) dir_item header and its data size
Against item boundary and maximum name/xattr length.
This part is mostly the same as old verify_dir_item().
2) dir_type
Against maximum file types, and against key type.
Since XATTR key should only have FT_XATTR dir item, and normal dir
item type should not have XATTR key.
The check between key->type and dir_type is newly introduced by this
patch.
3) name hash
For XATTR and DIR_ITEM key, key->offset is name hash (crc32c).
Check the hash of the name against the key to ensure it's correct.
The name hash check is only found in btrfs-progs before this patch.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Su Yue <suy.fnst@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
[bwh: Backported to 4.4: BTRFS_MAX_XATTR_SIZE() takes a root instead of an
fs_info, and yields a value of type size_t instead of unsigned int]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Qu Wenruo [Wed, 8 Nov 2017 00:54:24 +0000 (08:54 +0800)]
btrfs: tree-checker: Fix false panic for sanity test
commit
69fc6cbbac542c349b3d350d10f6e394c253c81d upstream.
[BUG]
If we run btrfs with CONFIG_BTRFS_FS_RUN_SANITY_TESTS=y, it will
instantly cause kernel panic like:
------
...
assertion failed: 0, file: fs/btrfs/disk-io.c, line: 3853
...
Call Trace:
btrfs_mark_buffer_dirty+0x187/0x1f0 [btrfs]
setup_items_for_insert+0x385/0x650 [btrfs]
__btrfs_drop_extents+0x129a/0x1870 [btrfs]
...
-----
[Cause]
Btrfs will call btrfs_check_leaf() in btrfs_mark_buffer_dirty() to check
if the leaf is valid with CONFIG_BTRFS_FS_RUN_SANITY_TESTS=y.
However quite some btrfs_mark_buffer_dirty() callers(*) don't really
initialize its item data but only initialize its item pointers, leaving
item data uninitialized.
This makes tree-checker catch uninitialized data as error, causing
such panic.
*: These callers include but not limited to
setup_items_for_insert()
btrfs_split_item()
btrfs_expand_item()
[Fix]
Add a new parameter @check_item_data to btrfs_check_leaf().
With @check_item_data set to false, item data check will be skipped and
fallback to old btrfs_check_leaf() behavior.
So we can still get early warning if we screw up item pointers, and
avoid false panic.
Cc: Filipe Manana <fdmanana@gmail.com>
Reported-by: Lakshmipathi.G <lakshmipathi.g@gmail.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
[bwh: Backported to 4.4: adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Qu Wenruo [Mon, 9 Oct 2017 01:51:03 +0000 (01:51 +0000)]
btrfs: tree-checker: Enhance btrfs_check_node output
commit
bba4f29896c986c4cec17bc0f19f2ce644fceae1 upstream.
Use inline function to replace macro since we don't need
stringification.
(Macro still exists until all callers get updated)
And add more info about the error, and replace EIO with EUCLEAN.
For nr_items error, report if it's too large or too small, and output
the valid value range.
For node block pointer, added a new alignment checker.
For key order, also output the next key to make the problem more
obvious.
Signed-off-by: Qu Wenruo <quwenruo.btrfs@gmx.com>
[ wording adjustments, unindented long strings ]
Signed-off-by: David Sterba <dsterba@suse.com>
[bwh: Backported to 4.4:
- Use root->sectorsize instead of root->fs_info->sectorsize
- BTRFS_NODEPTRS_PER_BLOCK() takes a root instead of an fs_info, and yields
a value of type size_t instead of unsigned int]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Qu Wenruo [Mon, 9 Oct 2017 01:51:02 +0000 (01:51 +0000)]
btrfs: Move leaf and node validation checker to tree-checker.c
commit
557ea5dd003d371536f6b4e8f7c8209a2b6fd4e3 upstream.
It's no doubt the comprehensive tree block checker will become larger,
so moving them into their own files is quite reasonable.
Signed-off-by: Qu Wenruo <quwenruo.btrfs@gmx.com>
[ wording adjustments ]
Signed-off-by: David Sterba <dsterba@suse.com>
[bwh: Backported to 4.4:
- The moved code is slightly different
- Adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Qu Wenruo [Wed, 23 Aug 2017 07:57:59 +0000 (16:57 +0900)]
btrfs: Add checker for EXTENT_CSUM
commit
4b865cab96fe2a30ed512cf667b354bd291b3b0a upstream.
EXTENT_CSUM checker is a relatively easy one, only needs to check:
1) Objectid
Fixed to BTRFS_EXTENT_CSUM_OBJECTID
2) Key offset alignment
Must be aligned to sectorsize
3) Item size alignedment
Must be aligned to csum size
Signed-off-by: Qu Wenruo <quwenruo.btrfs@gmx.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
[bwh: Backported to 4.4: Use root->sectorsize instead of
root->fs_info->sectorsize]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Qu Wenruo [Wed, 23 Aug 2017 07:57:58 +0000 (16:57 +0900)]
btrfs: Add sanity check for EXTENT_DATA when reading out leaf
commit
40c3c40947324d9f40bf47830c92c59a9bbadf4a upstream.
Add extra checks for item with EXTENT_DATA type. This checks the
following thing:
0) Key offset
All key offsets must be aligned to sectorsize.
Inline extent must have 0 for key offset.
1) Item size
Uncompressed inline file extent size must match item size.
(Compressed inline file extent has no information about its on-disk size.)
Regular/preallocated file extent size must be a fixed value.
2) Every member of regular file extent item
Including alignment for bytenr and offset, possible value for
compression/encryption/type.
3) Type/compression/encode must be one of the valid values.
This should be the most comprehensive and strict check in the context
of btrfs_item for EXTENT_DATA.
Signed-off-by: Qu Wenruo <quwenruo.btrfs@gmx.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ switch to BTRFS_FILE_EXTENT_TYPES, similar to what
BTRFS_COMPRESS_TYPES does ]
Signed-off-by: David Sterba <dsterba@suse.com>
[bwh: Backported to 4.4:
- Use root->sectorsize instead of root->fs_info->sectorsize
- Adjust filename]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Qu Wenruo [Wed, 23 Aug 2017 07:57:57 +0000 (16:57 +0900)]
btrfs: Check if item pointer overlaps with the item itself
commit
7f43d4affb2a254d421ab20b0cf65ac2569909fb upstream.
Function check_leaf() checks if any item pointer points outside of the
leaf, but it doesn't check if the pointer overlaps with the item itself.
Normally only the last item may be the victim, but adding such check is
never a bad idea anyway.
Signed-off-by: Qu Wenruo <quwenruo.btrfs@gmx.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Qu Wenruo [Wed, 23 Aug 2017 07:57:56 +0000 (16:57 +0900)]
btrfs: Refactor check_leaf function for later expansion
commit
c3267bbaa9cae09b62960eafe33ad19196803285 upstream.
Current check_leaf() function does a good job checking key order and
item offset/size.
However it only checks from slot 0 to the last but one slot, this is
good but makes later expansion hard.
So this refactoring iterates from slot 0 to the last slot.
For key comparison, it uses a key with all 0 as initial key, so all
valid keys should be larger than that.
And for item size/offset checks, it compares current item end with
previous item offset.
For slot 0, use leaf end as a special case.
This makes later item/key offset checks and item size checks easier to
be implemented.
Also, makes check_leaf() to return -EUCLEAN other than -EIO to indicate
error.
Signed-off-by: Qu Wenruo <quwenruo.btrfs@gmx.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
[bwh: Backported to 4.4:
- BTRFS_LEAF_DATA_SIZE() takes a root rather than an fs_info
- Adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jeff Mahoney [Thu, 29 Jun 2017 03:56:53 +0000 (21:56 -0600)]
btrfs: struct-funcs, constify readers
commit
1cbb1f454e5321e47fc1e6b233066c7ccc979d15 upstream.
We have reader helpers for most of the on-disk structures that use
an extent_buffer and pointer as offset into the buffer that are
read-only. We should mark them as const and, in turn, allow consumers
of these interfaces to mark the buffers const as well.
No impact on code, but serves as documentation that a buffer is intended
not to be modified.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Filipe Manana [Wed, 23 Nov 2016 16:21:18 +0000 (16:21 +0000)]
Btrfs: fix emptiness check for dirtied extent buffers at check_leaf()
commit
f177d73949bf758542ca15a1c1945bd2e802cc65 upstream.
We can not simply use the owner field from an extent buffer's header to
get the id of the respective tree when the extent buffer is from a
relocation tree. When we create the root for a relocation tree we leave
(on purpose) the owner field with the same value as the subvolume's tree
root (we do this at ctree.c:btrfs_copy_root()). So we must ignore extent
buffers from relocation trees, which have the BTRFS_HEADER_FLAG_RELOC
flag set, because otherwise we will always consider the extent buffer
as not being the root of the tree (the root of original subvolume tree
is always different from the root of the respective relocation tree).
This lead to assertion failures when running with the integrity checker
enabled (CONFIG_BTRFS_FS_CHECK_INTEGRITY=y) such as the following:
[ 643.393409] BTRFS critical (device sdg): corrupt leaf, non-root leaf's nritems is 0: block=
38506496, root=260, slot=0
[ 643.397609] BTRFS info (device sdg): leaf
38506496 total ptrs 0 free space 3995
[ 643.407075] assertion failed: 0, file: fs/btrfs/disk-io.c, line: 4078
[ 643.408425] ------------[ cut here ]------------
[ 643.409112] kernel BUG at fs/btrfs/ctree.h:3419!
[ 643.409773] invalid opcode: 0000 [#1] PREEMPT SMP
[ 643.410447] Modules linked in: dm_flakey dm_mod crc32c_generic btrfs xor raid6_pq ppdev psmouse acpi_cpufreq parport_pc evdev parport tpm_tis tpm_tis_core pcspkr serio_raw i2c_piix4 sg tpm i2c_core button processor loop autofs4 ext4 crc16 jbd2 mbcache sr_mod cdrom sd_mod ata_generic virtio_scsi ata_piix libata virtio_pci virtio_ring scsi_mod virtio e1000 floppy
[ 643.414356] CPU: 11 PID: 32726 Comm: btrfs Not tainted 4.8.0-rc8-btrfs-next-35+ #1
[ 643.414356] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
rel-1.9.1-0-gb3ef39f-prebuilt.qemu-project.org 04/01/2014
[ 643.414356] task:
ffff880145e95b00 task.stack:
ffff88014826c000
[ 643.414356] RIP: 0010:[<
ffffffffa0352759>] [<
ffffffffa0352759>] assfail.constprop.41+0x1c/0x1e [btrfs]
[ 643.414356] RSP: 0018:
ffff88014826fa28 EFLAGS:
00010292
[ 643.414356] RAX:
0000000000000039 RBX:
ffff88014e2d7c38 RCX:
0000000000000001
[ 643.414356] RDX:
ffff88023f4d2f58 RSI:
ffffffff81806c63 RDI:
00000000ffffffff
[ 643.414356] RBP:
ffff88014826fa28 R08:
0000000000000001 R09:
0000000000000000
[ 643.414356] R10:
ffff88014826f918 R11:
ffffffff82f3c5ed R12:
ffff880172910000
[ 643.414356] R13:
ffff880233992230 R14:
ffff8801a68a3310 R15:
fffffffffffffff8
[ 643.414356] FS:
00007f9ca305e8c0(0000) GS:
ffff88023f4c0000(0000) knlGS:
0000000000000000
[ 643.414356] CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
[ 643.414356] CR2:
00007f9ca3071000 CR3:
000000015d01b000 CR4:
00000000000006e0
[ 643.414356] Stack:
[ 643.414356]
ffff88014826fa50 ffffffffa02d655a 000000000000000a ffff88014e2d7c38
[ 643.414356]
0000000000000000 ffff88014826faa8 ffffffffa02b72f3 ffff88014826fab8
[ 643.414356]
00ffffffa03228e4 0000000000000000 0000000000000000 ffff8801bbd4e000
[ 643.414356] Call Trace:
[ 643.414356] [<
ffffffffa02d655a>] btrfs_mark_buffer_dirty+0xdf/0xe5 [btrfs]
[ 643.414356] [<
ffffffffa02b72f3>] btrfs_copy_root+0x18a/0x1d1 [btrfs]
[ 643.414356] [<
ffffffffa0322921>] create_reloc_root+0x72/0x1ba [btrfs]
[ 643.414356] [<
ffffffffa03267c2>] btrfs_init_reloc_root+0x7b/0xa7 [btrfs]
[ 643.414356] [<
ffffffffa02d9e44>] record_root_in_trans+0xdf/0xed [btrfs]
[ 643.414356] [<
ffffffffa02db04e>] btrfs_record_root_in_trans+0x50/0x6a [btrfs]
[ 643.414356] [<
ffffffffa030ad2b>] create_subvol+0x472/0x773 [btrfs]
[ 643.414356] [<
ffffffffa030b406>] btrfs_mksubvol+0x3da/0x463 [btrfs]
[ 643.414356] [<
ffffffffa030b406>] ? btrfs_mksubvol+0x3da/0x463 [btrfs]
[ 643.414356] [<
ffffffff810781ac>] ? preempt_count_add+0x65/0x68
[ 643.414356] [<
ffffffff811a6e97>] ? __mnt_want_write+0x62/0x77
[ 643.414356] [<
ffffffffa030b55d>] btrfs_ioctl_snap_create_transid+0xce/0x187 [btrfs]
[ 643.414356] [<
ffffffffa030b67d>] btrfs_ioctl_snap_create+0x67/0x81 [btrfs]
[ 643.414356] [<
ffffffffa030ecfd>] btrfs_ioctl+0x508/0x20dd [btrfs]
[ 643.414356] [<
ffffffff81293e39>] ? __this_cpu_preempt_check+0x13/0x15
[ 643.414356] [<
ffffffff81155eca>] ? handle_mm_fault+0x976/0x9ab
[ 643.414356] [<
ffffffff81091300>] ? arch_local_irq_save+0x9/0xc
[ 643.414356] [<
ffffffff8119a2b0>] vfs_ioctl+0x18/0x34
[ 643.414356] [<
ffffffff8119a8e8>] do_vfs_ioctl+0x581/0x600
[ 643.414356] [<
ffffffff814b9552>] ? entry_SYSCALL_64_fastpath+0x5/0xa8
[ 643.414356] [<
ffffffff81093fe9>] ? trace_hardirqs_on_caller+0x17b/0x197
[ 643.414356] [<
ffffffff8119a9be>] SyS_ioctl+0x57/0x79
[ 643.414356] [<
ffffffff814b9565>] entry_SYSCALL_64_fastpath+0x18/0xa8
[ 643.414356] [<
ffffffff81091b08>] ? trace_hardirqs_off_caller+0x3f/0xaa
[ 643.414356] Code: 89 83 88 00 00 00 31 c0 5b 41 5c 41 5d 5d c3 55 89 f1 48 c7 c2 98 bc 35 a0 48 89 fe 48 c7 c7 05 be 35 a0 48 89 e5 e8 13 46 dd e0 <0f> 0b 55 89 f1 48 c7 c2 9f d3 35 a0 48 89 fe 48 c7 c7 7a d5 35
[ 643.414356] RIP [<
ffffffffa0352759>] assfail.constprop.41+0x1c/0x1e [btrfs]
[ 643.414356] RSP <
ffff88014826fa28>
[ 643.468267] ---[ end trace
6a1b3fb1a9d7d6e3 ]---
This can be easily reproduced by running xfstests with the integrity
checker enabled.
Fixes:
1ba98d086fe3 (Btrfs: detect corruption when non-root leaf has zero item)
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Liu Bo [Fri, 23 Sep 2016 20:44:44 +0000 (13:44 -0700)]
Btrfs: memset to avoid stale content in btree leaf
commit
851cd173f06045816528176001cf82948282029c upstream.
This is an additional patch to
"Btrfs: memset to avoid stale content in btree node block".
This uses memset to initialize the unused space in a leaf to avoid
potential stale content, which may be incurred by pushing items
between sibling leaves.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Liu Bo [Thu, 15 Sep 2016 02:19:05 +0000 (19:19 -0700)]
Btrfs: kill BUG_ON in run_delayed_tree_ref
commit
02794222c4132ac003e7281fb71f4ec1645ffc87 upstream.
In a corrupted btrfs image, we can come across this BUG_ON and
get an unreponsive system, but if we return errors instead,
its caller can handle everything gracefully by aborting the current
transaction.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Liu Bo [Thu, 15 Sep 2016 00:23:24 +0000 (17:23 -0700)]
Btrfs: improve check_node to avoid reading corrupted nodes
commit
6b722c1747d533ac6d4df110dc8233db46918b65 upstream.
We need to check items in a node to make sure that we're reading
a valid one, otherwise we could get various crashes while processing
delayed_refs.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Liu Bo [Thu, 15 Sep 2016 00:22:57 +0000 (17:22 -0700)]
Btrfs: memset to avoid stale content in btree node block
commit
3eb548ee3a8042d95ad81be254e67a5222c24e03 upstream.
During updating btree, we could push items between sibling
nodes/leaves, for leaves data sections starts reversely from
the end of the block while for nodes we only have key pairs
which are stored one by one from the start of the block.
So we could do try to push key pairs from one node to the next
node right in the tree, and after that, we update the node's
nritems to reflect the correct end while leaving the stale
content in the node. One may intentionally corrupt the fs
image and access the stale content by bumping the nritems and
causes various crashes.
This takes the in-memory @nritems as the correct one and
gets to memset the unused part of a btree node.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Liu Bo [Fri, 2 Sep 2016 19:35:34 +0000 (12:35 -0700)]
Btrfs: fix BUG_ON in btrfs_mark_buffer_dirty
commit
ef85b25e982b5bba1530b936e283ef129f02ab9d upstream.
This can only happen with CONFIG_BTRFS_FS_CHECK_INTEGRITY=y.
Commit
1ba98d0 ("Btrfs: detect corruption when non-root leaf has zero item")
assumes that a leaf is its root when leaf->bytenr == btrfs_root_bytenr(root),
however, we should not use btrfs_root_bytenr(root) since it's mainly got
updated during committing transaction. So the check can fail when doing
COW on this leaf while it is a root.
This changes to use "if (leaf == btrfs_root_node(root))" instead, just like
how we check whether leaf is a root in __btrfs_cow_block().
Fixes:
1ba98d086fe3 (Btrfs: detect corruption when non-root leaf has zero item)
Reported-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Liu Bo [Wed, 24 Aug 2016 00:37:45 +0000 (17:37 -0700)]
Btrfs: check btree node's nritems
commit
053ab70f0604224c7893b43f9d9d5efa283580d6 upstream.
When btree node (level = 1) has nritems which equals to zero,
we can end up with panic due to insert_ptr()'s
BUG_ON(slot > nritems);
where slot is 1 and nritems is 0, as copy_for_split() calls
insert_ptr(.., path->slots[1] + 1, ...);
A invalid value results in the whole mess, this adds the check
for btree's node nritems so that we stop reading block when
when something is wrong.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Liu Bo [Tue, 23 Aug 2016 22:22:58 +0000 (15:22 -0700)]
Btrfs: detect corruption when non-root leaf has zero item
commit
1ba98d086fe3a14d6a31f2f66dbab70c45d00f63 upstream.
Right now we treat leaf which has zero item as a valid one
because we could have an empty tree, that is, a root that is
also a leaf without any item, however, in the same case but
when the leaf is not a root, we can end up with hitting the
BUG_ON(1) in btrfs_extend_item() called by
setup_inline_extent_backref().
This makes us check the situation as a corruption if leaf is
not its own root.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Josef Bacik [Thu, 18 Aug 2016 19:30:06 +0000 (15:30 -0400)]
Btrfs: fix em leak in find_first_block_group
commit
187ee58c62c1d0d238d3dc4835869d33e1869906 upstream.
We need to call free_extent_map() on the em we look up.
Signed-off-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Liu Bo [Thu, 23 Jun 2016 01:31:27 +0000 (18:31 -0700)]
Btrfs: check inconsistence between chunk and block group
commit
6fb37b756acce6d6e045f79c3764206033f617b4 upstream.
With btrfs-corrupt-block, one can drop one chunk item and mounting
will end up with a panic in btrfs_full_stripe_len().
This doesn't not remove the BUG_ON, but instead checks it a bit
earlier when we find the block group item.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Liu Bo [Fri, 3 Jun 2016 19:05:15 +0000 (12:05 -0700)]
Btrfs: add validadtion checks for chunk loading
commit
e06cd3dd7cea50e87663a88acdfdb7ac1c53a5ca upstream.
To prevent fuzzed filesystem images from panic the whole system,
we need various validation checks to refuse to mount such an image
if btrfs finds any invalid value during loading chunks, including
both sys_array and regular chunks.
Note that these checks may not be sufficient to cover all corner cases,
feel free to add more checks.
Reported-by: Vegard Nossum <vegard.nossum@oracle.com>
Reported-by: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Qu Wenruo [Tue, 15 Dec 2015 01:14:37 +0000 (09:14 +0800)]
btrfs: Enhance chunk validation check
commit
f04b772bfc17f502703794f4d100d12155c1a1a9 upstream.
Enhance chunk validation:
1) Num_stripes
We already have such check but it's only in super block sys chunk
array.
Now check all on-disk chunks.
2) Chunk logical
It should be aligned to sector size.
This behavior should be *DOUBLE CHECKED* for 64K sector size like
PPC64 or AArch64.
Maybe we can found some hidden bugs.
3) Chunk length
Same as chunk logical, should be aligned to sector size.
4) Stripe length
It should be power of 2.
5) Chunk type
Any bit out of TYPE_MAS | PROFILE_MASK is invalid.
With all these much restrict rules, several fuzzed image reported in
mail list should no longer cause kernel panic.
Reported-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jeff Mahoney [Wed, 3 Jun 2015 14:55:48 +0000 (10:55 -0400)]
btrfs: cleanup, stop casting for extent_map->lookup everywhere
commit
95617d69326ce386c95e33db7aeb832b45ee9f8f upstream.
Overloading extent_map->bdev to struct map_lookup * might have started out
as a means to an end, but it's a pattern that's used all over the place
now. Let's get rid of the casting and just add a union instead.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kailang Yang [Wed, 9 Jan 2019 09:05:24 +0000 (17:05 +0800)]
ALSA: hda/realtek - Disable headset Mic VREF for headset mode of ALC225
commit
d1dd42110d2727e81b9265841a62bc84c454c3a2 upstream.
Disable Headset Mic VREF for headset mode of ALC225.
This will be controlled by coef bits of headset mode functions.
[ Fixed a compile warning and code simplification -- tiwai ]
Signed-off-by: Kailang Yang <kailang@realtek.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Greg Kroah-Hartman [Sun, 13 Jan 2019 09:05:34 +0000 (10:05 +0100)]
Linux 4.4.170
Lubomir Rintel [Fri, 16 Nov 2018 16:23:47 +0000 (17:23 +0100)]
power: supply: olpc_battery: correct the temperature units
commit
ed54ffbe554f0902689fd6d1712bbacbacd11376 upstream.
According to [1] and [2], the temperature values are in tenths of degree
Celsius. Exposing the Celsius value makes the battery appear on fire:
$ upower -i /org/freedesktop/UPower/devices/battery_olpc_battery
...
temperature: 236.9 degrees C
Tested on OLPC XO-1 and OLPC XO-1.75 laptops.
[1] include/linux/power_supply.h
[2] Documentation/power/power_supply_class.txt
Fixes:
fb972873a767 ("[BATTERY] One Laptop Per Child power/battery driver")
Cc: stable@vger.kernel.org
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alexander Shishkin [Wed, 19 Dec 2018 15:19:22 +0000 (17:19 +0200)]
intel_th: msu: Fix an off-by-one in attribute store
commit
ec5b5ad6e272d8d6b92d1007f79574919862a2d2 upstream.
The 'nr_pages' attribute of the 'msc' subdevices parses a comma-separated
list of window sizes, passed from userspace. However, there is a bug in
the string parsing logic wherein it doesn't exclude the comma character
from the range of characters as it consumes them. This leads to an
out-of-bounds access given a sufficiently long list. For example:
> # echo 8,8,8,8 > /sys/bus/intel_th/devices/0-msc0/nr_pages
> ==================================================================
> BUG: KASAN: slab-out-of-bounds in memchr+0x1e/0x40
> Read of size 1 at addr
ffff8803ffcebcd1 by task sh/825
>
> CPU: 3 PID: 825 Comm: npktest.sh Tainted: G W 4.20.0-rc1+
> Call Trace:
> dump_stack+0x7c/0xc0
> print_address_description+0x6c/0x23c
> ? memchr+0x1e/0x40
> kasan_report.cold.5+0x241/0x308
> memchr+0x1e/0x40
> nr_pages_store+0x203/0xd00 [intel_th_msu]
Fix this by accounting for the comma character.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Fixes:
ba82664c134ef ("intel_th: Add Memory Storage Unit driver")
Cc: stable@vger.kernel.org # v4.4+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Christian Borntraeger [Wed, 12 Dec 2018 13:45:18 +0000 (14:45 +0100)]
genwqe: Fix size check
commit
fdd669684655c07dacbdb0d753fd13833de69a33 upstream.
Calling the test program genwqe_cksum with the default buffer size of
2MB triggers the following kernel warning on s390:
WARNING: CPU: 30 PID: 9311 at mm/page_alloc.c:3189 __alloc_pages_nodemask+0x45c/0xbe0
CPU: 30 PID: 9311 Comm: genwqe_cksum Kdump: loaded Not tainted 3.10.0-957.el7.s390x #1
task:
00000005e5d13980 ti:
00000005e7c6c000 task.ti:
00000005e7c6c000
Krnl PSW :
0704c00180000000 00000000002780ac (__alloc_pages_nodemask+0x45c/0xbe0)
R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 EA:3
Krnl GPRS:
00000000002932b8 0000000000b73d7c 0000000000000010 0000000000000009
0000000000000041 00000005e7c6f9b8 0000000000000001 00000000000080d0
0000000000000000 0000000000b70500 0000000000000001 0000000000000000
0000000000b70528 00000000007682c0 0000000000277df2 00000005e7c6f9a0
Krnl Code:
000000000027809e:
de7195001000 ed 1280(114,%r9),0(%r1)
00000000002780a4:
a774fead brc 7,277dfe
#
00000000002780a8:
a7f40001 brc 15,2780aa
>
00000000002780ac:
92011000 mvi 0(%r1),1
00000000002780b0:
a7f4fea7 brc 15,277dfe
00000000002780b4:
9101c6b6 tm 1718(%r12),1
00000000002780b8:
a784ff3a brc 8,277f2c
00000000002780bc:
a7f4fe2e brc 15,277d18
Call Trace:
([<
0000000000277df2>] __alloc_pages_nodemask+0x1a2/0xbe0)
[<
000000000013afae>] s390_dma_alloc+0xfe/0x310
[<
000003ff8065f362>] __genwqe_alloc_consistent+0xfa/0x148 [genwqe_card]
[<
000003ff80658f7a>] genwqe_mmap+0xca/0x248 [genwqe_card]
[<
00000000002b2712>] mmap_region+0x4e2/0x778
[<
00000000002b2c54>] do_mmap+0x2ac/0x3e0
[<
0000000000292d7e>] vm_mmap_pgoff+0xd6/0x118
[<
00000000002b081c>] SyS_mmap_pgoff+0xdc/0x268
[<
00000000002b0a34>] SyS_old_mmap+0x8c/0xb0
[<
000000000074e518>] sysc_tracego+0x14/0x1e
[<
000003ffacf87dc6>] 0x3ffacf87dc6
turns out the check in __genwqe_alloc_consistent uses "> MAX_ORDER"
while the mm code uses ">= MAX_ORDER". Fix genwqe.
Cc: stable@vger.kernel.org
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Frank Haverkamp <haver@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Yan, Zheng [Thu, 29 Nov 2018 03:22:50 +0000 (11:22 +0800)]
ceph: don't update importing cap's mseq when handing cap export
commit
3c1392d4c49962a31874af14ae9ff289cb2b3851 upstream.
Updating mseq makes client think importer mds has accepted all prior
cap messages and importer mds knows what caps client wants. Actually
some cap messages may have been dropped because of mseq mismatch.
If mseq is left untouched, importing cap's mds_wanted later will get
reset by cap import message.
Cc: stable@vger.kernel.org
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sohil Mehta [Wed, 21 Nov 2018 23:29:33 +0000 (15:29 -0800)]
iommu/vt-d: Handle domain agaw being less than iommu agaw
commit
3569dd07aaad71920c5ea4da2d5cc9a167c1ffd4 upstream.
The Intel IOMMU driver opportunistically skips a few top level page
tables from the domain paging directory while programming the IOMMU
context entry. However there is an implicit assumption in the code that
domain's adjusted guest address width (agaw) would always be greater
than IOMMU's agaw.
The IOMMU capabilities in an upcoming platform cause the domain's agaw
to be lower than IOMMU's agaw. The issue is seen when the IOMMU supports
both 4-level and 5-level paging. The domain builds a 4-level page table
based on agaw of 2. However the IOMMU's agaw is set as 3 (5-level). In
this case the code incorrectly tries to skip page page table levels.
This causes the IOMMU driver to avoid programming the context entry. The
fix handles this case and programs the context entry accordingly.
Fixes:
de24e55395698 ("iommu/vt-d: Simplify domain_context_mapping_one")
Cc: <stable@vger.kernel.org>
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Reported-by: Ramos Falcon, Ernesto R <ernesto.r.ramos.falcon@intel.com>
Tested-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Signed-off-by: Sohil Mehta <sohil.mehta@intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dominique Martinet [Mon, 5 Nov 2018 08:52:48 +0000 (09:52 +0100)]
9p/net: put a lower bound on msize
commit
574d356b7a02c7e1b01a1d9cba8a26b3c2888f45 upstream.
If the requested msize is too small (either from command line argument
or from the server version reply), we won't get any work done.
If it's *really* too small, nothing will work, and this got caught by
syzbot recently (on a new kmem_cache_create_usercopy() call)
Just set a minimum msize to 4k in both code paths, until someone
complains they have a use-case for a smaller msize.
We need to check in both mount option and server reply individually
because the msize for the first version request would be unchecked
with just a global check on clnt->msize.
Link: http://lkml.kernel.org/r/1541407968-31350-1-git-send-email-asmadeus@codewreck.org
Reported-by: syzbot+0c1d61e4db7db94102ca@syzkaller.appspotmail.com
Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Latchesar Ionkov <lucho@ionkov.net>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Larry Finger [Mon, 19 Nov 2018 18:01:24 +0000 (20:01 +0200)]
b43: Fix error in cordic routine
commit
8ea3819c0bbef57a51d8abe579e211033e861677 upstream.
The cordic routine for calculating sines and cosines that was added in
commit
6f98e62a9f1b ("b43: update cordic code to match current specs")
contains an error whereby a quantity declared u32 can in fact go negative.
This problem was detected by Priit Laes who is switching b43 to use the
routine in the library functions of the kernel.
Fixes:
986504540306 ("b43: make cordic common (LP-PHY and N-PHY need it)")
Reported-by: Priit Laes <plaes@plaes.org>
Cc: Rafał Miłecki <zajec5@gmail.com>
Cc: Stable <stable@vger.kernel.org> # 2.6.34
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Priit Laes <plaes@plaes.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Andreas Gruenbacher [Tue, 4 Dec 2018 14:06:27 +0000 (15:06 +0100)]
gfs2: Fix loop in gfs2_rbm_find
commit
2d29f6b96d8f80322ed2dd895bca590491c38d34 upstream.
Fix the resource group wrap-around logic in gfs2_rbm_find that commit
e579ed4f44 broke. The bug can lead to unnecessary repeated scanning of the
same bitmaps; there is a risk that future changes will turn this into an
endless loop.
Fixes:
e579ed4f44 ("GFS2: Introduce rbm field bii")
Cc: stable@vger.kernel.org # v3.13+
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vasily Averin [Thu, 15 Nov 2018 10:18:56 +0000 (13:18 +0300)]
dlm: memory leaks on error path in dlm_user_request()
commit
d47b41aceeadc6b58abc9c7c6485bef7cfb75636 upstream.
According to comment in dlm_user_request() ua should be freed
in dlm_free_lkb() after successful attach to lkb.
However ua is attached to lkb not in set_lock_args() but later,
inside request_lock().
Fixes
597d0cae0f99 ("[DLM] dlm: user locks")
Cc: stable@kernel.org # 2.6.19
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vasily Averin [Thu, 15 Nov 2018 10:18:24 +0000 (13:18 +0300)]
dlm: lost put_lkb on error path in receive_convert() and receive_unlock()
commit
c0174726c3976e67da8649ac62cae43220ae173a upstream.
Fixes
6d40c4a708e0 ("dlm: improve error and debug messages")
Cc: stable@kernel.org # 3.5
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vasily Averin [Thu, 15 Nov 2018 10:18:18 +0000 (13:18 +0300)]
dlm: possible memory leak on error path in create_lkb()
commit
23851e978f31eda8b2d01bd410d3026659ca06c7 upstream.
Fixes
3d6aa675fff9 ("dlm: keep lkbs in idr")
Cc: stable@kernel.org # 3.1
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vasily Averin [Thu, 15 Nov 2018 10:15:05 +0000 (13:15 +0300)]
dlm: fixed memory leaks after failed ls_remove_names allocation
commit
b982896cdb6e6a6b89d86dfb39df489d9df51e14 upstream.
If allocation fails on last elements of array need to free already
allocated elements.
v2: just move existing out_rsbtbl label to right place
Fixes
789924ba635f ("dlm: fix race between remove and lookup")
Cc: stable@kernel.org # 3.6
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Hui Peng [Tue, 25 Dec 2018 23:11:52 +0000 (18:11 -0500)]
ALSA: usb-audio: Fix an out-of-bound read in create_composite_quirks
commit
cbb2ebf70daf7f7d97d3811a2ff8e39655b8c184 upstream.
In `create_composite_quirk`, the terminating condition of for loops is
`quirk->ifnum < 0`. So any composite quirks should end with `struct
snd_usb_audio_quirk` object with ifnum < 0.
for (quirk = quirk_comp->data; quirk->ifnum >= 0; ++quirk) {
.....
}
the data field of Bower's & Wilkins PX headphones usb device device quirks
do not end with {.ifnum = -1}, wihch may result in out-of-bound read.
This Patch fix the bug by adding an ending quirk object.
Fixes:
240a8af929c7 ("ALSA: usb-audio: Add a quirck for B&W PX headphones")
Signed-off-by: Hui Peng <benquike@163.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Takashi Iwai [Wed, 19 Dec 2018 11:36:27 +0000 (12:36 +0100)]
ALSA: usb-audio: Avoid access before bLength check in build_audio_procunit()
commit
f4351a199cc120ff9d59e06d02e8657d08e6cc46 upstream.
The parser for the processing unit reads bNrInPins field before the
bLength sanity check, which may lead to an out-of-bound access when a
malformed descriptor is given. Fix it by assignment after the bLength
check.
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dan Carpenter [Tue, 8 Jan 2019 07:43:30 +0000 (10:43 +0300)]
ALSA: cs46xx: Potential NULL dereference in probe
commit
1524f4e47f90b27a3ac84efbdd94c63172246a6f upstream.
The "chip->dsp_spos_instance" can be NULL on some of the ealier error
paths in snd_cs46xx_create().
Reported-by: "Yavuz, Tuba" <tuba@ece.ufl.edu>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Eric Biggers [Mon, 7 Jan 2019 23:15:59 +0000 (15:15 -0800)]
crypto: x86/chacha20 - avoid sleeping with preemption disabled
In chacha20-simd, clear the MAY_SLEEP flag in the blkcipher_desc to
prevent sleeping with preemption disabled, under kernel_fpu_begin().
This was fixed upstream incidentally by a large refactoring,
commit
9ae433bc79f9 ("crypto: chacha20 - convert generic and x86
versions to skcipher"). But syzkaller easily trips over this when
running on older kernels, as it's easily reachable via AF_ALG.
Therefore, this patch makes the minimal fix for older kernels.
Fixes:
c9320b6dcb89 ("crypto: chacha20 - Add a SSSE3 SIMD variant for x86_64")
Cc: linux-crypto@vger.kernel.org
Cc: Martin Willi <martin@strongswan.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vasily Averin [Mon, 24 Dec 2018 11:44:42 +0000 (14:44 +0300)]
sunrpc: use SVC_NET() in svcauth_gss_* functions
commit
b8be5674fa9a6f3677865ea93f7803c4212f3e10 upstream.
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vasily Averin [Wed, 28 Nov 2018 08:45:57 +0000 (11:45 +0300)]
sunrpc: fix cache_head leak due to queued request
commit
4ecd55ea074217473f94cfee21bb72864d39f8d7 upstream.
After commit
d202cce8963d, an expired cache_head can be removed from the
cache_detail's hash.
However, the expired cache_head may be waiting for a reply from a
previously submitted request. Such a cache_head has an increased
refcounter and therefore it won't be freed after cache_put(freeme).
Because the cache_head was removed from the hash it cannot be found
during cache_clean() and can be leaked forever, together with stalled
cache_request and other taken resources.
In our case we noticed it because an entry in the export cache was
holding a reference on a filesystem.
Fixes
d202cce8963d ("sunrpc: never return expired entries in sunrpc_cache_lookup")
Cc: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>
Cc: stable@kernel.org # 2.6.35
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dan Williams [Fri, 28 Dec 2018 08:34:54 +0000 (00:34 -0800)]
mm, devm_memremap_pages: kill mapping "System RAM" support
commit
06489cfbd915ff36c8e36df27f1c2dc60f97ca56 upstream.
Given the fact that devm_memremap_pages() requires a percpu_ref that is
torn down by devm_memremap_pages_release() the current support for mapping
RAM is broken.
Support for remapping "System RAM" has been broken since the beginning and
there is no existing user of this this code path, so just kill the support
and make it an explicit error.
This cleanup also simplifies a follow-on patch to fix the error path when
setting a devm release action for devm_memremap_pages_release() fails.
Link: http://lkml.kernel.org/r/154275557997.76910.14689813630968180480.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: "Jérôme Glisse" <jglisse@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dan Williams [Fri, 28 Dec 2018 08:34:50 +0000 (00:34 -0800)]
mm, devm_memremap_pages: mark devm_memremap_pages() EXPORT_SYMBOL_GPL
commit
808153e1187fa77ac7d7dad261ff476888dcf398 upstream.
devm_memremap_pages() is a facility that can create struct page entries
for any arbitrary range and give drivers the ability to subvert core
aspects of page management.
Specifically the facility is tightly integrated with the kernel's memory
hotplug functionality. It injects an altmap argument deep into the
architecture specific vmemmap implementation to allow allocating from
specific reserved pages, and it has Linux specific assumptions about page
structure reference counting relative to get_user_pages() and
get_user_pages_fast(). It was an oversight and a mistake that this was
not marked EXPORT_SYMBOL_GPL from the outset.
Again, devm_memremap_pagex() exposes and relies upon core kernel internal
assumptions and will continue to evolve along with 'struct page', memory
hotplug, and support for new memory types / topologies. Only an in-kernel
GPL-only driver is expected to keep up with this ongoing evolution. This
interface, and functionality derived from this interface, is not suitable
for kernel-external drivers.
Link: http://lkml.kernel.org/r/154275557457.76910.16923571232582744134.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: "Jérôme Glisse" <jglisse@redhat.com>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: Logan Gunthorpe <logang@deltatee.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Michal Hocko [Fri, 28 Dec 2018 08:38:01 +0000 (00:38 -0800)]
hwpoison, memory_hotplug: allow hwpoisoned pages to be offlined
commit
b15c87263a69272423771118c653e9a1d0672caa upstream.
We have received a bug report that an injected MCE about faulty memory
prevents memory offline to succeed on 4.4 base kernel. The underlying
reason was that the HWPoison page has an elevated reference count and the
migration keeps failing. There are two problems with that. First of all
it is dubious to migrate the poisoned page because we know that accessing
that memory is possible to fail. Secondly it doesn't make any sense to
migrate a potentially broken content and preserve the memory corruption
over to a new location.
Oscar has found out that 4.4 and the current upstream kernels behave
slightly differently with his simply testcase
===
int main(void)
{
int ret;
int i;
int fd;
char *array = malloc(4096);
char *array_locked = malloc(4096);
fd = open("/tmp/data", O_RDONLY);
read(fd, array, 4095);
for (i = 0; i < 4096; i++)
array_locked[i] = 'd';
ret = mlock((void *)PAGE_ALIGN((unsigned long)array_locked), sizeof(array_locked));
if (ret)
perror("mlock");
sleep (20);
ret = madvise((void *)PAGE_ALIGN((unsigned long)array_locked), 4096, MADV_HWPOISON);
if (ret)
perror("madvise");
for (i = 0; i < 4096; i++)
array_locked[i] = 'd';
return 0;
}
===
+ offline this memory.
In 4.4 kernels he saw the hwpoisoned page to be returned back to the LRU
list
kernel: [<
ffffffff81019ac9>] dump_trace+0x59/0x340
kernel: [<
ffffffff81019e9a>] show_stack_log_lvl+0xea/0x170
kernel: [<
ffffffff8101ac71>] show_stack+0x21/0x40
kernel: [<
ffffffff8132bb90>] dump_stack+0x5c/0x7c
kernel: [<
ffffffff810815a1>] warn_slowpath_common+0x81/0xb0
kernel: [<
ffffffff811a275c>] __pagevec_lru_add_fn+0x14c/0x160
kernel: [<
ffffffff811a2eed>] pagevec_lru_move_fn+0xad/0x100
kernel: [<
ffffffff811a334c>] __lru_cache_add+0x6c/0xb0
kernel: [<
ffffffff81195236>] add_to_page_cache_lru+0x46/0x70
kernel: [<
ffffffffa02b4373>] extent_readpages+0xc3/0x1a0 [btrfs]
kernel: [<
ffffffff811a16d7>] __do_page_cache_readahead+0x177/0x200
kernel: [<
ffffffff811a18c8>] ondemand_readahead+0x168/0x2a0
kernel: [<
ffffffff8119673f>] generic_file_read_iter+0x41f/0x660
kernel: [<
ffffffff8120e50d>] __vfs_read+0xcd/0x140
kernel: [<
ffffffff8120e9ea>] vfs_read+0x7a/0x120
kernel: [<
ffffffff8121404b>] kernel_read+0x3b/0x50
kernel: [<
ffffffff81215c80>] do_execveat_common.isra.29+0x490/0x6f0
kernel: [<
ffffffff81215f08>] do_execve+0x28/0x30
kernel: [<
ffffffff81095ddb>] call_usermodehelper_exec_async+0xfb/0x130
kernel: [<
ffffffff8161c045>] ret_from_fork+0x55/0x80
And that latter confuses the hotremove path because an LRU page is
attempted to be migrated and that fails due to an elevated reference
count. It is quite possible that the reuse of the HWPoisoned page is some
kind of fixed race condition but I am not really sure about that.
With the upstream kernel the failure is slightly different. The page
doesn't seem to have LRU bit set but isolate_movable_page simply fails and
do_migrate_range simply puts all the isolated pages back to LRU and
therefore no progress is made and scan_movable_pages finds same set of
pages over and over again.
Fix both cases by explicitly checking HWPoisoned pages before we even try
to get reference on the page, try to unmap it if it is still mapped. As
explained by Naoya:
: Hwpoison code never unmapped those for no big reason because
: Ksm pages never dominate memory, so we simply didn't have strong
: motivation to save the pages.
Also put WARN_ON(PageLRU) in case there is a race and we can hit LRU
HWPoison pages which shouldn't happen but I couldn't convince myself about
that. Naoya has noted the following:
: Theoretically no such gurantee, because try_to_unmap() doesn't have a
: guarantee of success and then memory_failure() returns immediately
: when hwpoison_user_mappings fails.
: Or the following code (comes after hwpoison_user_mappings block) also impli=
: es
: that the target page can still have PageLRU flag.
:
: /*
: * Torn down by someone else?
: */
: if (PageLRU(p) && !PageSwapCache(p) && p->mapping =3D=3D NULL) {
: action_result(pfn, MF_MSG_TRUNCATED_LRU, MF_IGNORED);
: res =3D -EBUSY;
: goto out;
: }
:
: So I think it's OK to keep "if (WARN_ON(PageLRU(page)))" block in
: current version of your patch.
Link: http://lkml.kernel.org/r/20181206120135.14079-1-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Oscar Salvador <osalvador@suse.com>
Debugged-by: Oscar Salvador <osalvador@suse.com>
Tested-by: Oscar Salvador <osalvador@suse.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David Herrmann [Tue, 8 Jan 2019 12:58:52 +0000 (13:58 +0100)]
fork: record start_time late
commit
7b55851367136b1efd84d98fea81ba57a98304cf upstream.
This changes the fork(2) syscall to record the process start_time after
initializing the basic task structure but still before making the new
process visible to user-space.
Technically, we could record the start_time anytime during fork(2). But
this might lead to scenarios where a start_time is recorded long before
a process becomes visible to user-space. For instance, with
userfaultfd(2) and TLS, user-space can delay the execution of fork(2)
for an indefinite amount of time (and will, if this causes network
access, or similar).
By recording the start_time late, it much closer reflects the point in
time where the process becomes live and can be observed by other
processes.
Lastly, this makes it much harder for user-space to predict and control
the start_time they get assigned. Previously, user-space could fork a
process and stall it in copy_thread_tls() before its pid is allocated,
but after its start_time is recorded. This can be misused to later-on
cycle through PIDs and resume the stalled fork(2) yielding a process
that has the same pid and start_time as a process that existed before.
This can be used to circumvent security systems that identify processes
by their pid+start_time combination.
Even though user-space was always aware that start_time recording is
flaky (but several projects are known to still rely on start_time-based
identification), changing the start_time to be recorded late will help
mitigate existing attacks and make it much harder for user-space to
control the start_time a process gets assigned.
Reported-by: Jann Horn <jannh@google.com>
Signed-off-by: Tom Gundersen <teg@jklm.no>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Steffen Maier [Thu, 6 Dec 2018 16:31:20 +0000 (17:31 +0100)]
scsi: zfcp: fix posting too many status read buffers leading to adapter shutdown
commit
60a161b7e5b2a252ff0d4c622266a7d8da1120ce upstream.
Suppose adapter (open) recovery is between opened QDIO queues and before
(the end of) initial posting of status read buffers (SRBs). This time
window can be seconds long due to FSF_PROT_HOST_CONNECTION_INITIALIZING
causing by design looping with exponential increase sleeps in the function
performing exchange config data during recovery
[zfcp_erp_adapter_strat_fsf_xconf()]. Recovery triggered by local link up.
Suppose an event occurs for which the FCP channel would send an unsolicited
notification to zfcp by means of a previously posted SRB. We saw it with
local cable pull (link down) in multi-initiator zoning with multiple
NPIV-enabled subchannels of the same shared FCP channel.
As soon as zfcp_erp_adapter_strategy_open_fsf() starts posting the initial
status read buffers from within the adapter's ERP thread, the channel does
send an unsolicited notification.
Since v2.6.27 commit
d26ab06ede83 ("[SCSI] zfcp: receiving an unsolicted
status can lead to I/O stall"), zfcp_fsf_status_read_handler() schedules
adapter->stat_work to re-fill the just consumed SRB from a work item.
Now the ERP thread and the work item post SRBs in parallel. Both contexts
call the helper function zfcp_status_read_refill(). The tracking of
missing (to be posted / re-filled) SRBs is not thread-safe due to separate
atomic_read() and atomic_dec(), in order to depend on posting
success. Hence, both contexts can see
atomic_read(&adapter->stat_miss) == 1. One of the two contexts posts
one too many SRB. Zfcp gets QDIO_ERROR_SLSB_STATE on the output queue
(trace tag "qdireq1") leading to zfcp_erp_adapter_shutdown() in
zfcp_qdio_handler_error().
An obvious and seemingly clean fix would be to schedule stat_work from the
ERP thread and wait for it to finish. This would serialize all SRB
re-fills. However, we already have another work item wait on the ERP
thread: adapter->scan_work runs zfcp_fc_scan_ports() which calls
zfcp_fc_eval_gpn_ft(). The latter calls zfcp_erp_wait() to wait for all the
open port recoveries during zfcp auto port scan, but in fact it waits for
any pending recovery including an adapter recovery. This approach leads to
a deadlock. [see also v3.19 commit
18f87a67e6d6 ("zfcp: auto port scan
resiliency"); v2.6.37 commit
d3e1088d6873
("[SCSI] zfcp: No ERP escalation on gpn_ft eval");
v2.6.28 commit
fca55b6fb587
("[SCSI] zfcp: fix deadlock between wq triggered port scan and ERP")
fixing v2.6.27 commit
c57a39a45a76
("[SCSI] zfcp: wait until adapter is finished with ERP during auto-port");
v2.6.27 commit
cc8c282963bd
("[SCSI] zfcp: Automatically attach remote ports")]
Instead make the accounting of missing SRBs atomic for parallel execution
in both the ERP thread and adapter->stat_work.
Signed-off-by: Steffen Maier <maier@linux.ibm.com>
Fixes:
d26ab06ede83 ("[SCSI] zfcp: receiving an unsolicted status can lead to I/O stall")
Cc: <stable@vger.kernel.org> #2.6.27+
Reviewed-by: Jens Remus <jremus@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tony Lindgren [Tue, 4 Dec 2018 21:52:49 +0000 (13:52 -0800)]
Input: omap-keypad - fix idle configuration to not block SoC idle states
[ Upstream commit
e2ca26ec4f01486661b55b03597c13e2b9c18b73 ]
With PM enabled, I noticed that pressing a key on the droid4 keyboard will
block deeper idle states for the SoC. Let's fix this by using IRQF_ONESHOT
and stop constantly toggling the device OMAP4_KBD_IRQENABLE register as
suggested by Dmitry Torokhov <dmitry.torokhov@gmail.com>.
From the hardware point of view, looks like we need to manage the registers
for OMAP4_KBD_IRQENABLE and OMAP4_KBD_WAKEUPENABLE together to avoid
blocking deeper SoC idle states. And with toggling of OMAP4_KBD_IRQENABLE
register now gone with IRQF_ONESHOT, also the SoC idle state problem is
gone during runtime. We still also need to clear OMAP4_KBD_WAKEUPENABLE in
omap4_keypad_close() though to pair it with omap4_keypad_open() to prevent
blocking deeper SoC idle states after rmmod omap4-keypad.
Reported-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Dan Carpenter [Thu, 1 Nov 2018 05:25:30 +0000 (08:25 +0300)]
scsi: bnx2fc: Fix NULL dereference in error handling
[ Upstream commit
9ae4f8420ed7be4b13c96600e3568c144d101a23 ]
If "interface" is NULL then we can't release it and trying to will only
lead to an Oops.
Fixes:
aea71a024914 ("[SCSI] bnx2fc: Introduce interface structure for each vlan interface")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Benjamin Poirier [Mon, 5 Nov 2018 08:00:53 +0000 (17:00 +0900)]
xfrm: Fix bucket count reported to userspace
[ Upstream commit
ca92e173ab34a4f7fc4128bd372bd96f1af6f507 ]
sadhcnt is reported by `ip -s xfrm state count` as "buckets count", not the
hash mask.
Fixes:
28d8909bc790 ("[XFRM]: Export SAD info.")
Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Qian Cai [Fri, 14 Dec 2018 22:17:20 +0000 (14:17 -0800)]
checkstack.pl: fix for aarch64
[ Upstream commit
f1733a1d3cd32a9492f4cf866be37bb46e10163d ]
There is actually a space after "sp," like this,
ffff2000080813c8:
a9bb7bfd stp x29, x30, [sp, #-80]!
Right now, checkstack.pl isn't able to print anything on aarch64,
because it won't be able to match the stating objdump line of a function
due to this missing space. Hence, it displays every stack as zero-size.
After this patch, checkpatch.pl is able to match the start of a
function's objdump, and is then able to calculate each function's stack
correctly.
Link: http://lkml.kernel.org/r/20181207195843.38528-1-cai@lca.pw
Signed-off-by: Qian Cai <cai@lca.pw>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Peter Hutterer [Wed, 5 Dec 2018 23:03:36 +0000 (09:03 +1000)]
Input: restore EV_ABS ABS_RESERVED
[ Upstream commit
c201e3808e0e4be9b98d192802085a9f491bd80c ]
ABS_RESERVED was added in
d9ca1c990a7 and accidentally removed as part of
ffe0e7cf290f5c9 when the high-resolution scrolling code was removed.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Martin Kepplinger <martin.kepplinger@ginzinger.com>
Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Anson Huang [Tue, 4 Dec 2018 03:17:45 +0000 (03:17 +0000)]
ARM: imx: update the cpu power up timing setting on i.mx6sx
[ Upstream commit
1e434b703248580b7aaaf8a115d93e682f57d29f ]
The sw2iso count should cover ARM LDO ramp-up time,
the MAX ARM LDO ramp-up time may be up to more than
100us on some boards, this patch sets sw2iso to 0xf
(~384us) which is the reset value, and it is much
more safe to cover different boards, since we have
observed that some customer boards failed with current
setting of 0x2.
Fixes:
05136f0897b5 ("ARM: imx: support arm power off in cpuidle for i.mx6sx")
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Paul Mackerras [Mon, 26 Nov 2018 22:01:54 +0000 (09:01 +1100)]
powerpc: Fix COFF zImage booting on old powermacs
[ Upstream commit
5564597d51c8ff5b88d95c76255e18b13b760879 ]
Commit
6975a783d7b4 ("powerpc/boot: Allow building the zImage wrapper
as a relocatable ET_DYN", 2011-04-12) changed the procedure descriptor
at the start of crt0.S to have a hard-coded start address of 0x500000
rather than a reference to _zimage_start, presumably because having
a reference to a symbol introduced a relocation which is awkward to
handle in a position-independent executable. Unfortunately, what is
at 0x500000 in the COFF image is not the first instruction, but the
procedure descriptor itself, that is, a word containing 0x500000,
which is not a valid instruction. Hence, booting a COFF zImage
results in a "DEFAULT CATCH!, code=
FFF00700" message from Open
Firmware.
This fixes the problem by (a) putting the procedure descriptor in the
data section and (b) adding a branch to _zimage_start as the first
instruction in the program.
Fixes:
6975a783d7b4 ("powerpc/boot: Allow building the zImage wrapper as a relocatable ET_DYN")
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Lukas Wunner [Thu, 29 Nov 2018 14:14:49 +0000 (15:14 +0100)]
spi: bcm2835: Unbreak the build of esoteric configs
commit
29bdedfd9cf40e59456110ca417a8cb672ac9b92 upstream.
Commit
e82b0b382845 ("spi: bcm2835: Fix race on DMA termination") broke
the build with COMPILE_TEST=y on arches whose cmpxchg() requires 32-bit
operands (xtensa, older arm ISAs).
Fix by changing the dma_pending flag's type from bool to unsigned int.
Fixes:
e82b0b382845 ("spi: bcm2835: Fix race on DMA termination")
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: Frank Pavlic <f.pavlic@kunbus.de>
Cc: Martin Sperl <kernel@martin.sperl.org>
Cc: Noralf Trønnes <noralf@tronnes.org>
Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vitaly Kuznetsov [Thu, 25 Jan 2018 15:37:07 +0000 (16:37 +0100)]
x86/kvm/vmx: do not use vm-exit instruction length for fast MMIO when running nested
commit
d391f1207067268261add0485f0f34503539c5b0 upstream.
I was investigating an issue with seabios >= 1.10 which stopped working
for nested KVM on Hyper-V. The problem appears to be in
handle_ept_violation() function: when we do fast mmio we need to skip
the instruction so we do kvm_skip_emulated_instruction(). This, however,
depends on VM_EXIT_INSTRUCTION_LEN field being set correctly in VMCS.
However, this is not the case.
Intel's manual doesn't mandate VM_EXIT_INSTRUCTION_LEN to be set when
EPT MISCONFIG occurs. While on real hardware it was observed to be set,
some hypervisors follow the spec and don't set it; we end up advancing
IP with some random value.
I checked with Microsoft and they confirmed they don't fill
VM_EXIT_INSTRUCTION_LEN on EPT MISCONFIG.
Fix the issue by doing instruction skip through emulator when running
nested.
Fixes:
68c3b4d1676d870f0453c31d5a52e7e65c7448ae
Suggested-by: Radim Krčmář <rkrcmar@redhat.com>
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
[mhaboustak: backport to 4.9.y]
Signed-off-by: Mike Haboustak <haboustak@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Georgy A Bystrenin [Fri, 21 Dec 2018 06:11:42 +0000 (00:11 -0600)]
CIFS: Fix error mapping for SMB2_LOCK command which caused OFD lock problem
commit
9a596f5b39593414c0ec80f71b94a226286f084e upstream.
While resolving a bug with locks on samba shares found a strange behavior.
When a file locked by one node and we trying to lock it from another node
it fail with errno 5 (EIO) but in that case errno must be set to
(EACCES | EAGAIN).
This isn't happening when we try to lock file second time on same node.
In this case it returns EACCES as expected.
Also this issue not reproduces when we use SMB1 protocol (vers=1.0 in
mount options).
Further investigation showed that the mapping from status_to_posix_error
is different for SMB1 and SMB2+ implementations.
For SMB1 mapping is [NT_STATUS_LOCK_NOT_GRANTED to ERRlock]
(See fs/cifs/netmisc.c line 66)
but for SMB2+ mapping is [STATUS_LOCK_NOT_GRANTED to -EIO]
(see fs/cifs/smb2maperror.c line 383)
Quick changes in SMB2+ mapping from EIO to EACCES has fixed issue.
BUG: https://bugzilla.kernel.org/show_bug.cgi?id=201971
Signed-off-by: Georgy A Bystrenin <gkot@altlinux.org>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Huacai Chen [Thu, 15 Nov 2018 07:53:56 +0000 (15:53 +0800)]
MIPS: Align kernel load address to 64KB
commit
bec0de4cfad21bd284dbddee016ed1767a5d2823 upstream.
KEXEC needs the new kernel's load address to be aligned on a page
boundary (see sanity_check_segment_list()), but on MIPS the default
vmlinuz load address is only explicitly aligned to 16 bytes.
Since the largest PAGE_SIZE supported by MIPS kernels is 64KB, increase
the alignment calculated by calc_vmlinuz_load_addr to 64KB.
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/21131/
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <james.hogan@mips.com>
Cc: Steven J . Hill <Steven.Hill@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: <stable@vger.kernel.org> # 2.6.36+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Huacai Chen [Thu, 15 Nov 2018 07:53:54 +0000 (15:53 +0800)]
MIPS: Ensure pmd_present() returns false after pmd_mknotpresent()
commit
92aa0718c9fa5160ad2f0e7b5bffb52f1ea1e51a upstream.
This patch is borrowed from ARM64 to ensure pmd_present() returns false
after pmd_mknotpresent(). This is needed for THP.
References:
5bb1cc0ff9a6 ("arm64: Ensure pmd_present() returns false after pmd_mknotpresent()")
Reviewed-by: James Hogan <jhogan@kernel.org>
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/21135/
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <james.hogan@mips.com>
Cc: Steven J . Hill <Steven.Hill@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: <stable@vger.kernel.org> # 3.8+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Hans Verkuil [Fri, 9 Nov 2018 13:37:44 +0000 (08:37 -0500)]
media: vivid: free bitmap_cap when updating std/timings/etc.
commit
560ccb75c2caa6b1039dec1a53cd2ef526f5bf03 upstream.
When vivid_update_format_cap() is called it should free any overlay
bitmap since the compose size will change.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reported-by: syzbot+0cc8e3cc63ca373722c6@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org> # for v3.18 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Macpaul Lin [Wed, 19 Dec 2018 04:11:03 +0000 (12:11 +0800)]
cdc-acm: fix abnormal DATA RX issue for Mediatek Preloader.
commit
eafb27fa5283599ce6c5492ea18cf636a28222bb upstream.
Mediatek Preloader is a proprietary embedded boot loader for loading
Little Kernel and Linux into device DRAM.
This boot loader also handle firmware update. Mediatek Preloader will be
enumerated as a virtual COM port when the device is connected to Windows
or Linux OS via CDC-ACM class driver. When the USB enumeration has been
done, Mediatek Preloader will send out handshake command "READY" to PC
actively instead of waiting command from the download tool.
Since Linux 4.12, the commit "tty: reset termios state on device
registration" (
93857edd9829e144acb6c7e72d593f6e01aead66) causes Mediatek
Preloader receiving some abnoraml command like "READYXX" as it sent.
This will be recognized as an incorrect response. The behavior change
also causes the download handshake fail. This change only affects
subsequent connects if the reconnected device happens to get the same minor
number.
By disabling the ECHO termios flag could avoid this problem. However, it
cannot be done by user space configuration when download tool open
/dev/ttyACM0. This is because the device running Mediatek Preloader will
send handshake command "READY" immediately once the CDC-ACM driver is
ready.
This patch wants to fix above problem by introducing "DISABLE_ECHO"
property in driver_info. When Mediatek Preloader is connected, the
CDC-ACM driver could disable ECHO flag in termios to avoid the problem.
Signed-off-by: Macpaul Lin <macpaul.lin@mediatek.com>
Cc: stable@vger.kernel.org
Reviewed-by: Johan Hovold <johan@kernel.org>
Acked-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Lukas Wunner [Thu, 8 Nov 2018 07:06:10 +0000 (08:06 +0100)]
spi: bcm2835: Avoid finishing transfer prematurely in IRQ mode
commit
56c1723426d3cfd4723bfbfce531d7b38bae6266 upstream.
The IRQ handler bcm2835_spi_interrupt() first reads as much as possible
from the RX FIFO, then writes as much as possible to the TX FIFO.
Afterwards it decides whether the transfer is finished by checking if
the TX FIFO is empty.
If very few bytes were written to the TX FIFO, they may already have
been transmitted by the time the FIFO's emptiness is checked. As a
result, the transfer will be declared finished and the chip will be
reset without reading the corresponding received bytes from the RX FIFO.
The odds of this happening increase with a high clock frequency (such
that the TX FIFO drains quickly) and either passing "threadirqs" on the
command line or enabling CONFIG_PREEMPT_RT_BASE (such that the IRQ
handler may be preempted between filling the TX FIFO and checking its
emptiness).
Fix by instead checking whether rx_len has reached zero, which means
that the transfer has been received in full. This is also more
efficient as it avoids one bus read access per interrupt. Note that
bcm2835_spi_transfer_one_poll() likewise uses rx_len to determine
whether the transfer has finished.
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Fixes:
e34ff011c70e ("spi: bcm2835: move to the transfer_one driver model")
Cc: stable@vger.kernel.org # v4.1+
Cc: Mathias Duckeck <m.duckeck@kunbus.de>
Cc: Frank Pavlic <f.pavlic@kunbus.de>
Cc: Martin Sperl <kernel@martin.sperl.org>
Cc: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Lukas Wunner [Thu, 8 Nov 2018 07:06:10 +0000 (08:06 +0100)]
spi: bcm2835: Fix book-keeping of DMA termination
commit
dbc944115eed48af110646992893dc43321368d8 upstream.
If submission of a DMA TX transfer succeeds but submission of the
corresponding RX transfer does not, the BCM2835 SPI driver terminates
the TX transfer but neglects to reset the dma_pending flag to false.
Thus, if the next transfer uses interrupt mode (because it is shorter
than BCM2835_SPI_DMA_MIN_LENGTH) and runs into a timeout,
dmaengine_terminate_all() will be called both for TX (once more) and
for RX (which was never started in the first place). Fix it.
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Fixes:
3ecd37edaa2a ("spi: bcm2835: enable dma modes for transfers meeting certain conditions")
Cc: stable@vger.kernel.org # v4.2+
Cc: Mathias Duckeck <m.duckeck@kunbus.de>
Cc: Frank Pavlic <f.pavlic@kunbus.de>
Cc: Martin Sperl <kernel@martin.sperl.org>
Cc: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Lukas Wunner [Thu, 8 Nov 2018 07:06:10 +0000 (08:06 +0100)]
spi: bcm2835: Fix race on DMA termination
commit
e82b0b3828451c1cd331d9f304c6078fcd43b62e upstream.
If a DMA transfer finishes orderly right when spi_transfer_one_message()
determines that it has timed out, the callbacks bcm2835_spi_dma_done()
and bcm2835_spi_handle_err() race to call dmaengine_terminate_all(),
potentially leading to double termination.
Prevent by atomically changing the dma_pending flag before calling
dmaengine_terminate_all().
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Fixes:
3ecd37edaa2a ("spi: bcm2835: enable dma modes for transfers meeting certain conditions")
Cc: stable@vger.kernel.org # v4.2+
Cc: Mathias Duckeck <m.duckeck@kunbus.de>
Cc: Frank Pavlic <f.pavlic@kunbus.de>
Cc: Martin Sperl <kernel@martin.sperl.org>
Cc: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Theodore Ts'o [Wed, 19 Dec 2018 19:07:58 +0000 (14:07 -0500)]
ext4: force inode writes when nfsd calls commit_metadata()
commit
fde872682e175743e0c3ef939c89e3c6008a1529 upstream.
Some time back, nfsd switched from calling vfs_fsync() to using a new
commit_metadata() hook in export_operations(). If the file system did
not provide a commit_metadata() hook, it fell back to using
sync_inode_metadata(). Unfortunately doesn't work on all file
systems. In particular, it doesn't work on ext4 due to how the inode
gets journalled --- the VFS writeback code will not always call
ext4_write_inode().
So we need to provide our own ext4_nfs_commit_metdata() method which
calls ext4_write_inode() directly.
Google-Bug-Id:
121195940
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
ruippan (潘睿) [Tue, 4 Dec 2018 06:04:12 +0000 (01:04 -0500)]
ext4: fix EXT4_IOC_GROUP_ADD ioctl
commit
e647e29196b7f802f8242c39ecb7cc937f5ef217 upstream.
Commit
e2b911c53584 ("ext4: clean up feature test macros with
predicate functions") broke the EXT4_IOC_GROUP_ADD ioctl. This was
not noticed since only very old versions of resize2fs (before
e2fsprogs 1.42) use this ioctl. However, using a new kernel with an
enterprise Linux userspace will cause attempts to use online resize to
fail with "No reserved GDT blocks".
Fixes:
e2b911c53584 ("ext4: clean up feature test macros with predicate...")
Cc: stable@kernel.org # v4.4
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: ruippan (潘睿) <ruippan@tencent.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Maurizio Lombardi [Tue, 4 Dec 2018 05:06:53 +0000 (00:06 -0500)]
ext4: missing unlock/put_page() in ext4_try_to_write_inline_data()
commit
132d00becb31e88469334e1e62751c81345280e0 upstream.
In case of error, ext4_try_to_write_inline_data() should unlock
and release the page it holds.
Fixes:
f19d5870cbf7 ("ext4: add normal write support for inline data")
Cc: stable@kernel.org # 3.8
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Pan Bian [Tue, 4 Dec 2018 04:28:02 +0000 (23:28 -0500)]
ext4: fix possible use after free in ext4_quota_enable
commit
61157b24e60fb3cd1f85f2c76a7b1d628f970144 upstream.
The function frees qf_inode via iput but then pass qf_inode to
lockdep_set_quota_inode on the failure path. This may result in a
use-after-free bug. The patch frees df_inode only when it is never used.
Fixes:
daf647d2dd5 ("ext4: add lockdep annotations for i_data_sem")
Cc: stable@kernel.org # 4.6
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ben Hutchings [Sun, 11 Nov 2018 18:45:24 +0000 (18:45 +0000)]
perf pmu: Suppress potential format-truncation warning
commit
11a64a05dc649815670b1be9fe63d205cb076401 upstream.
Depending on which functions are inlined in util/pmu.c, the snprintf()
calls in perf_pmu__parse_{scale,unit,per_pkg,snapshot}() might trigger a
warning:
util/pmu.c: In function 'pmu_aliases':
util/pmu.c:178:31: error: '%s' directive output may be truncated writing up to 255 bytes into a region of size between 0 and 4095 [-Werror=format-truncation=]
snprintf(path, PATH_MAX, "%s/%s.unit", dir, name);
^~
I found this when trying to build perf from Linux 3.16 with gcc 8.
However I can reproduce the problem in mainline if I force
__perf_pmu__new_alias() to be inlined.
Suppress this by using scnprintf() as has been done elsewhere in perf.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20181111184524.fux4taownc6ndbx6@decadent.org.uk
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sean Christopherson [Thu, 20 Dec 2018 22:21:08 +0000 (14:21 -0800)]
KVM: x86: Use jmp to invoke kvm_spurious_fault() from .fixup
commit
e81434995081fd7efb755fd75576b35dbb0850b1 upstream.
____kvm_handle_fault_on_reboot() provides a generic exception fixup
handler that is used to cleanly handle faults on VMX/SVM instructions
during reboot (or at least try to). If there isn't a reboot in
progress, ____kvm_handle_fault_on_reboot() treats any exception as
fatal to KVM and invokes kvm_spurious_fault(), which in turn generates
a BUG() to get a stack trace and die.
When it was originally added by commit
4ecac3fd6dc2 ("KVM: Handle
virtualization instruction #UD faults during reboot"), the "call" to
kvm_spurious_fault() was handcoded as PUSH+JMP, where the PUSH'd value
is the RIP of the faulting instructing.
The PUSH+JMP trickery is necessary because the exception fixup handler
code lies outside of its associated function, e.g. right after the
function. An actual CALL from the .fixup code would show a slightly
bogus stack trace, e.g. an extra "random" function would be inserted
into the trace, as the return RIP on the stack would point to no known
function (and the unwinder will likely try to guess who owns the RIP).
Unfortunately, the JMP was replaced with a CALL when the macro was
reworked to not spin indefinitely during reboot (commit
b7c4145ba2eb
"KVM: Don't spin on virt instruction faults during reboot"). This
causes the aforementioned behavior where a bogus function is inserted
into the stack trace, e.g. my builds like to blame free_kvm_area().
Revert the CALL back to a JMP. The changelog for commit
b7c4145ba2eb
("KVM: Don't spin on virt instruction faults during reboot") contains
nothing that indicates the switch to CALL was deliberate. This is
backed up by the fact that the PUSH <insn RIP> was left intact.
Note that an alternative to the PUSH+JMP magic would be to JMP back
to the "real" code and CALL from there, but that would require adding
a JMP in the non-faulting path to avoid calling kvm_spurious_fault()
and would add no value, i.e. the stack trace would be the same.
Using CALL:
------------[ cut here ]------------
kernel BUG at /home/sean/go/src/kernel.org/linux/arch/x86/kvm/x86.c:356!
invalid opcode: 0000 [#1] SMP
CPU: 4 PID: 1057 Comm: qemu-system-x86 Not tainted 4.20.0-rc6+ #75
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
RIP: 0010:kvm_spurious_fault+0x5/0x10 [kvm]
Code: <0f> 0b 66 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 41 55 49 89 fd 41
RSP: 0018:
ffffc900004bbcc8 EFLAGS:
00010046
RAX:
0000000000000000 RBX:
0000000000000000 RCX:
ffffffffffffffff
RDX:
0000000000000000 RSI:
0000000000000000 RDI:
0000000000000000
RBP:
ffff888273fd8000 R08:
00000000000003e8 R09:
0000000000000000
R10:
0000000000000000 R11:
0000000000000784 R12:
ffffc90000371fb0
R13:
0000000000000000 R14:
000000026d763cf4 R15:
ffff888273fd8000
FS:
00007f3d69691700(0000) GS:
ffff888277800000(0000) knlGS:
0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
CR2:
000055f89bc56fe0 CR3:
0000000271a5a001 CR4:
0000000000362ee0
Call Trace:
free_kvm_area+0x1044/0x43ea [kvm_intel]
? vmx_vcpu_run+0x156/0x630 [kvm_intel]
? kvm_arch_vcpu_ioctl_run+0x447/0x1a40 [kvm]
? kvm_vcpu_ioctl+0x368/0x5c0 [kvm]
? kvm_vcpu_ioctl+0x368/0x5c0 [kvm]
? __set_task_blocked+0x38/0x90
? __set_current_blocked+0x50/0x60
? __fpu__restore_sig+0x97/0x490
? do_vfs_ioctl+0xa1/0x620
? __x64_sys_futex+0x89/0x180
? ksys_ioctl+0x66/0x70
? __x64_sys_ioctl+0x16/0x20
? do_syscall_64+0x4f/0x100
? entry_SYSCALL_64_after_hwframe+0x44/0xa9
Modules linked in: vhost_net vhost tap kvm_intel kvm irqbypass bridge stp llc
---[ end trace
9775b14b123b1713 ]---
Using JMP:
------------[ cut here ]------------
kernel BUG at /home/sean/go/src/kernel.org/linux/arch/x86/kvm/x86.c:356!
invalid opcode: 0000 [#1] SMP
CPU: 6 PID: 1067 Comm: qemu-system-x86 Not tainted 4.20.0-rc6+ #75
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
RIP: 0010:kvm_spurious_fault+0x5/0x10 [kvm]
Code: <0f> 0b 66 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 41 55 49 89 fd 41
RSP: 0018:
ffffc90000497cd0 EFLAGS:
00010046
RAX:
0000000000000000 RBX:
0000000000000000 RCX:
ffffffffffffffff
RDX:
0000000000000000 RSI:
0000000000000000 RDI:
0000000000000000
RBP:
ffff88827058bd40 R08:
00000000000003e8 R09:
0000000000000000
R10:
0000000000000000 R11:
0000000000000784 R12:
ffffc90000369fb0
R13:
0000000000000000 R14:
00000003c8fc6642 R15:
ffff88827058bd40
FS:
00007f3d7219e700(0000) GS:
ffff888277900000(0000) knlGS:
0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
CR2:
00007f3d64001000 CR3:
0000000271c6b004 CR4:
0000000000362ee0
Call Trace:
vmx_vcpu_run+0x156/0x630 [kvm_intel]
? kvm_arch_vcpu_ioctl_run+0x447/0x1a40 [kvm]
? kvm_vcpu_ioctl+0x368/0x5c0 [kvm]
? kvm_vcpu_ioctl+0x368/0x5c0 [kvm]
? __set_task_blocked+0x38/0x90
? __set_current_blocked+0x50/0x60
? __fpu__restore_sig+0x97/0x490
? do_vfs_ioctl+0xa1/0x620
? __x64_sys_futex+0x89/0x180
? ksys_ioctl+0x66/0x70
? __x64_sys_ioctl+0x16/0x20
? do_syscall_64+0x4f/0x100
? entry_SYSCALL_64_after_hwframe+0x44/0xa9
Modules linked in: vhost_net vhost tap kvm_intel kvm irqbypass bridge stp llc
---[ end trace
f9daedb85ab3ddba ]---
Fixes:
b7c4145ba2eb ("KVM: Don't spin on virt instruction faults during reboot")
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Patrick Dreyer [Sun, 23 Dec 2018 18:06:35 +0000 (10:06 -0800)]
Input: elan_i2c - add ACPI ID for touchpad in ASUS Aspire F5-573G
commit
7db54c89f0b30a101584e09d3729144e6170059d upstream.
This adds ELAN0501 to the ACPI table to support Elan touchpad found in ASUS
Aspire F5-573G.
Signed-off-by: Patrick Dreyer <Patrick.Dreyer@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jia-Ju Bai [Tue, 18 Dec 2018 12:04:25 +0000 (20:04 +0800)]
usb: r8a66597: Fix a possible concurrency use-after-free bug in r8a66597_endpoint_disable()
commit
c85400f886e3d41e69966470879f635a2b50084c upstream.
The function r8a66597_endpoint_disable() and r8a66597_urb_enqueue() may
be concurrently executed.
The two functions both access a possible shared variable "hep->hcpriv".
This shared variable is freed by r8a66597_endpoint_disable() via the
call path:
r8a66597_endpoint_disable
kfree(hep->hcpriv) (line 1995 in Linux-4.19)
This variable is read by r8a66597_urb_enqueue() via the call path:
r8a66597_urb_enqueue
spin_lock_irqsave(&r8a66597->lock)
init_pipe_info
enable_r8a66597_pipe
pipe = hep->hcpriv (line 802 in Linux-4.19)
The read operation is protected by a spinlock, but the free operation
is not protected by this spinlock, thus a concurrency use-after-free bug
may occur.
To fix this bug, the spin-lock and spin-unlock function calls in
r8a66597_endpoint_disable() are moved to protect the free operation.
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jörgen Storvist [Fri, 21 Dec 2018 13:40:44 +0000 (14:40 +0100)]
USB: serial: option: add Fibocom NL678 series
commit
4b2c01ad902ec02fa962b233decd2f14be3714ba upstream.
Added USB serial option driver support for Fibocom NL678 series cellular
module: VID 2cb7 and PIDs 0x0104 and 0x0105.
Reserved network and ADB interfaces.
T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=2cb7 ProdID=0104 Rev=03.10
S: Manufacturer=Fibocom
S: Product=Fibocom NL678-E Modem
S: SerialNumber=
12345678
C: #Ifs= 6 Cfg#= 1 Atr=a0 MxPwr=500mA
I: If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
I: If#= 1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I: If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I: If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I: If#= 4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=qmi_wwan
I: If#= 5 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=42 Prot=01 Driver=(none)
T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 3 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=2cb7 ProdID=0105 Rev=03.10
S: Manufacturer=Fibocom
S: Product=Fibocom NL678-E Modem
S: SerialNumber=
12345678
C: #Ifs= 7 Cfg#= 1 Atr=a0 MxPwr=500mA
I: If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
I: If#= 1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I: If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I: If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I: If#= 4 Alt= 0 #EPs= 1 Cls=02(commc) Sub=06 Prot=00 Driver=cdc_ether
I: If#= 5 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether
I: If#= 6 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=42 Prot=01 Driver=(none)
Signed-off-by: Jörgen Storvist <jorgen.storvist@gmail.com>
Cc: stable <stable@vger.kernel.org>
Acked-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Scott Chen [Thu, 13 Dec 2018 11:01:47 +0000 (06:01 -0500)]
USB: serial: pl2303: add ids for Hewlett-Packard HP POS pole displays
commit
8d503f206c336677954160ac62f0c7d9c219cd89 upstream.
Add device ids to pl2303 for the HP POS pole displays:
LM920: 03f0:026b
TD620: 03f0:0956
LD960TA: 03f0:4439
LD220TA: 03f0:4349
LM940: 03f0:5039
Signed-off-by: Scott Chen <scott@labau.com.tw>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sameer Pujar [Wed, 26 Dec 2018 10:34:49 +0000 (16:04 +0530)]
ALSA: hda/tegra: clear pending irq handlers
commit
63d2a9ec310d8bcc955574220d4631aa55c1a80c upstream.
Even after disabling interrupts on the module, it could be possible
that irq handlers are still running. System hang is seen during
suspend path. It was found that, there were pending writes on the
HDA bus and clock was disabled by that time.
Above mentioned issue is fixed by clearing any pending irq handlers
before disabling clocks and returning from hda suspend.
Suggested-by: Mohan Kumar <mkumard@nvidia.com>
Suggested-by: Dara Ramesh <dramesh@nvidia.com>
Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mantas Mikulėnas [Sun, 16 Dec 2018 13:44:47 +0000 (15:44 +0200)]
ALSA: hda: add mute LED support for HP EliteBook 840 G4
commit
40906ebe3af6a48457151b3c6726b480f6a6cb13 upstream.
Tested with 4.19.9.
v2: Changed from CXT_FIXUP_MUTE_LED_GPIO to CXT_FIXUP_HP_DOCK because
that's what the existing fixups for EliteBooks use.
Signed-off-by: Mantas Mikulėnas <grawity@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Gustavo A. R. Silva [Wed, 12 Dec 2018 17:20:49 +0000 (11:20 -0600)]
ALSA: emux: Fix potential Spectre v1 vulnerabilities
commit
4aea96f4237cea0c51a8bc87c0db31f0f932f1f0 upstream.
info.mode and info.port are indirectly controlled by user-space,
hence leading to a potential exploitation of the Spectre variant 1
vulnerability.
These issues were detected with the help of Smatch:
sound/synth/emux/emux_hwdep.c:72 snd_emux_hwdep_misc_mode() warn: potential spectre issue 'emu->portptrs[i]->ctrls' [w] (local cap)
sound/synth/emux/emux_hwdep.c:75 snd_emux_hwdep_misc_mode() warn: potential spectre issue 'emu->portptrs' [w] (local cap)
sound/synth/emux/emux_hwdep.c:75 snd_emux_hwdep_misc_mode() warn: potential spectre issue 'emu->portptrs[info.port]->ctrls' [w] (local cap)
Fix this by sanitizing both info.mode and info.port before using them
to index emu->portptrs[i]->ctrls, emu->portptrs[info.port]->ctrls and
emu->portptrs.
Notice that given that speculation windows are large, the policy is
to kill the speculation on the first load and not worry if it can be
completed with a dependent load/store [1].
[1] https://marc.info/?l=linux-kernel&m=
152449131114778&w=2
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Cc: stable@vger.kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Gustavo A. R. Silva [Wed, 12 Dec 2018 21:36:28 +0000 (15:36 -0600)]
ALSA: pcm: Fix potential Spectre v1 vulnerability
commit
94ffb030b6d31ec840bb811be455dd2e26a4f43e upstream.
stream is indirectly controlled by user-space, hence leading to
a potential exploitation of the Spectre variant 1 vulnerability.
This issue was detected with the help of Smatch:
sound/core/pcm.c:140 snd_pcm_control_ioctl() warn: potential spectre issue 'pcm->streams' [r] (local cap)
Fix this by sanitizing stream before using it to index pcm->streams
Notice that given that speculation windows are large, the policy is
to kill the speculation on the first load and not worry if it can be
completed with a dependent load/store [1].
[1] https://marc.info/?l=linux-kernel&m=
152449131114778&w=2
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Cc: stable@vger.kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Gustavo A. R. Silva [Tue, 18 Dec 2018 17:52:16 +0000 (11:52 -0600)]
ALSA: emu10k1: Fix potential Spectre v1 vulnerabilities
commit
5ae4f61f012a097df93de2285070ec8e34716d29 upstream.
ipcm->substream is indirectly controlled by user-space, hence leading to
a potential exploitation of the Spectre variant 1 vulnerability.
This issue was detected with the help of Smatch:
sound/pci/emu10k1/emufx.c:1031 snd_emu10k1_ipcm_poke() warn: potential spectre issue 'emu->fx8010.pcm' [r] (local cap)
sound/pci/emu10k1/emufx.c:1075 snd_emu10k1_ipcm_peek() warn: potential spectre issue 'emu->fx8010.pcm' [r] (local cap)
Fix this by sanitizing ipcm->substream before using it to index emu->fx8010.pcm
Notice that given that speculation windows are large, the policy is
to kill the speculation on the first load and not worry if it can be
completed with a dependent load/store [1].
[1] https://marc.info/?l=linux-kernel&m=
152449131114778&w=2
Cc: stable@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Gustavo A. R. Silva [Tue, 18 Dec 2018 17:18:34 +0000 (11:18 -0600)]
ALSA: rme9652: Fix potential Spectre v1 vulnerability
commit
0b84304ef5da92add8dc75a1b07879c5374cdb05 upstream.
info->channel is indirectly controlled by user-space, hence leading to
a potential exploitation of the Spectre variant 1 vulnerability.
This issue was detected with the help of Smatch:
sound/pci/rme9652/hdsp.c:4100 snd_hdsp_channel_info() warn: potential spectre issue 'hdsp->channel_map' [r] (local cap)
Fix this by sanitizing info->channel before using it to index hdsp->channel_map
Notice that given that speculation windows are large, the policy is
to kill the speculation on the first load and not worry if it can be
completed with a dependent load/store [1].
Also, notice that I refactored the code a bit in order to get rid of the
following checkpatch warning:
ERROR: do not use assignment in if condition
FILE: sound/pci/rme9652/hdsp.c:4103:
if ((mapped_channel = hdsp->channel_map[info->channel]) < 0)
[1] https://marc.info/?l=linux-kernel&m=
152449131114778&w=2
Cc: stable@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Deepa Dinamani [Fri, 28 Dec 2018 02:55:09 +0000 (18:55 -0800)]
sock: Make sock->sk_stamp thread-safe
[ Upstream commit
3a0ed3e9619738067214871e9cb826fa23b2ddb9 ]
Al Viro mentioned (Message-ID
<
20170626041334.GZ10672@ZenIV.linux.org.uk>)
that there is probably a race condition
lurking in accesses of sk_stamp on 32-bit machines.
sock->sk_stamp is of type ktime_t which is always an s64.
On a 32 bit architecture, we might run into situations of
unsafe access as the access to the field becomes non atomic.
Use seqlocks for synchronization.
This allows us to avoid using spinlocks for readers as
readers do not need mutual exclusion.
Another approach to solve this is to require sk_lock for all
modifications of the timestamps. The current approach allows
for timestamps to have their own lock: sk_stamp_lock.
This allows for the patch to not compete with already
existing critical sections, and side effects are limited
to the paths in the patch.
The addition of the new field maintains the data locality
optimizations from
commit
9115e8cd2a0c ("net: reorganize struct sock for better data
locality")
Note that all the instances of the sk_stamp accesses
are either through the ioctl or the syscall recvmsg.
Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Lorenzo Bianconi [Wed, 19 Dec 2018 22:23:00 +0000 (23:23 +0100)]
gro_cell: add napi_disable in gro_cells_destroy
[ Upstream commit
8e1da73acded4751a93d4166458a7e640f37d26c ]
Add napi_disable routine in gro_cells_destroy since starting from
commit
c42858eaf492 ("gro_cells: remove spinlock protecting receive
queues") gro_cell_poll and gro_cells_destroy can run concurrently on
napi_skbs list producing a kernel Oops if the tunnel interface is
removed while gro_cell_poll is running. The following Oops has been
triggered removing a vxlan device while the interface is receiving
traffic
[ 5628.948853] BUG: unable to handle kernel NULL pointer dereference at
0000000000000008
[ 5628.949981] PGD 0 P4D 0
[ 5628.950308] Oops: 0002 [#1] SMP PTI
[ 5628.950748] CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.20.0-rc6+ #41
[ 5628.952940] RIP: 0010:gro_cell_poll+0x49/0x80
[ 5628.955615] RSP: 0018:
ffffc9000004fdd8 EFLAGS:
00010202
[ 5628.956250] RAX:
0000000000000000 RBX:
ffffe8ffffc08150 RCX:
0000000000000000
[ 5628.957102] RDX:
0000000000000000 RSI:
ffff88802356bf00 RDI:
ffffe8ffffc08150
[ 5628.957940] RBP:
0000000000000026 R08:
0000000000000000 R09:
0000000000000000
[ 5628.958803] R10:
0000000000000001 R11:
0000000000000000 R12:
0000000000000040
[ 5628.959661] R13:
ffffe8ffffc08100 R14:
0000000000000000 R15:
0000000000000040
[ 5628.960682] FS:
0000000000000000(0000) GS:
ffff88803ea00000(0000) knlGS:
0000000000000000
[ 5628.961616] CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
[ 5628.962359] CR2:
0000000000000008 CR3:
000000000221c000 CR4:
00000000000006b0
[ 5628.963188] DR0:
0000000000000000 DR1:
0000000000000000 DR2:
0000000000000000
[ 5628.964034] DR3:
0000000000000000 DR6:
00000000fffe0ff0 DR7:
0000000000000400
[ 5628.964871] Call Trace:
[ 5628.965179] net_rx_action+0xf0/0x380
[ 5628.965637] __do_softirq+0xc7/0x431
[ 5628.966510] run_ksoftirqd+0x24/0x30
[ 5628.966957] smpboot_thread_fn+0xc5/0x160
[ 5628.967436] kthread+0x113/0x130
[ 5628.968283] ret_from_fork+0x3a/0x50
[ 5628.968721] Modules linked in:
[ 5628.969099] CR2:
0000000000000008
[ 5628.969510] ---[ end trace
9d9dedc7181661fe ]---
[ 5628.970073] RIP: 0010:gro_cell_poll+0x49/0x80
[ 5628.972965] RSP: 0018:
ffffc9000004fdd8 EFLAGS:
00010202
[ 5628.973611] RAX:
0000000000000000 RBX:
ffffe8ffffc08150 RCX:
0000000000000000
[ 5628.974504] RDX:
0000000000000000 RSI:
ffff88802356bf00 RDI:
ffffe8ffffc08150
[ 5628.975462] RBP:
0000000000000026 R08:
0000000000000000 R09:
0000000000000000
[ 5628.976413] R10:
0000000000000001 R11:
0000000000000000 R12:
0000000000000040
[ 5628.977375] R13:
ffffe8ffffc08100 R14:
0000000000000000 R15:
0000000000000040
[ 5628.978296] FS:
0000000000000000(0000) GS:
ffff88803ea00000(0000) knlGS:
0000000000000000
[ 5628.979327] CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
[ 5628.980044] CR2:
0000000000000008 CR3:
000000000221c000 CR4:
00000000000006b0
[ 5628.980929] DR0:
0000000000000000 DR1:
0000000000000000 DR2:
0000000000000000
[ 5628.981736] DR3:
0000000000000000 DR6:
00000000fffe0ff0 DR7:
0000000000000400
[ 5628.982409] Kernel panic - not syncing: Fatal exception in interrupt
[ 5628.983307] Kernel Offset: disabled
Fixes:
c42858eaf492 ("gro_cells: remove spinlock protecting receive queues")
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Juergen Gross [Tue, 18 Dec 2018 15:06:19 +0000 (16:06 +0100)]
xen/netfront: tolerate frags with no data
[ Upstream commit
d81c5054a5d1d4999c7cdead7636b6cd4af83d36 ]
At least old Xen net backends seem to send frags with no real data
sometimes. In case such a fragment happens to occur with the frag limit
already reached the frontend will BUG currently even if this situation
is easily recoverable.
Modify the BUG_ON() condition accordingly.
Tested-by: Dietmar Hahn <dietmar.hahn@ts.fujitsu.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jorgen Hansen [Tue, 18 Dec 2018 08:34:06 +0000 (00:34 -0800)]
VSOCK: Send reset control packet when socket is partially bound
[ Upstream commit
a915b982d8f5e4295f64b8dd37ce753874867e88 ]
If a server side socket is bound to an address, but not in the listening
state yet, incoming connection requests should receive a reset control
packet in response. However, the function used to send the reset
silently drops the reset packet if the sending socket isn't bound
to a remote address (as is the case for a bound socket not yet in
the listening state). This change fixes this by using the src
of the incoming packet as destination for the reset packet in
this case.
Fixes:
d021c344051a ("VSOCK: Introduce VM Sockets")
Reviewed-by: Adit Ranadive <aditr@vmware.com>
Reviewed-by: Vishnu Dasa <vdasa@vmware.com>
Signed-off-by: Jorgen Hansen <jhansen@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jason Wang [Thu, 13 Dec 2018 02:53:37 +0000 (10:53 +0800)]
vhost: make sure used idx is seen before log in vhost_add_used_n()
[ Upstream commit
841df922417eb82c835e93d4b93eb6a68c99d599 ]
We miss a write barrier that guarantees used idx is updated and seen
before log. This will let userspace sync and copy used ring before
used idx is update. Fix this by adding a barrier before log_write().
Fixes:
8dd014adfea6f ("vhost-net: mergeable buffers support")
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Xin Long [Mon, 10 Dec 2018 10:00:52 +0000 (18:00 +0800)]
sctp: initialize sin6_flowinfo for ipv6 addrs in sctp_inet6addr_event
[ Upstream commit
4a2eb0c37b4759416996fbb4c45b932500cf06d3 ]
syzbot reported a kernel-infoleak, which is caused by an uninitialized
field(sin6_flowinfo) of addr->a.v6 in sctp_inet6addr_event().
The call trace is as below:
BUG: KMSAN: kernel-infoleak in _copy_to_user+0x19a/0x230 lib/usercopy.c:33
CPU: 1 PID: 8164 Comm: syz-executor2 Not tainted 4.20.0-rc3+ #95
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x32d/0x480 lib/dump_stack.c:113
kmsan_report+0x12c/0x290 mm/kmsan/kmsan.c:683
kmsan_internal_check_memory+0x32a/0xa50 mm/kmsan/kmsan.c:743
kmsan_copy_to_user+0x78/0xd0 mm/kmsan/kmsan_hooks.c:634
_copy_to_user+0x19a/0x230 lib/usercopy.c:33
copy_to_user include/linux/uaccess.h:183 [inline]
sctp_getsockopt_local_addrs net/sctp/socket.c:5998 [inline]
sctp_getsockopt+0x15248/0x186f0 net/sctp/socket.c:7477
sock_common_getsockopt+0x13f/0x180 net/core/sock.c:2937
__sys_getsockopt+0x489/0x550 net/socket.c:1939
__do_sys_getsockopt net/socket.c:1950 [inline]
__se_sys_getsockopt+0xe1/0x100 net/socket.c:1947
__x64_sys_getsockopt+0x62/0x80 net/socket.c:1947
do_syscall_64+0xcf/0x110 arch/x86/entry/common.c:291
entry_SYSCALL_64_after_hwframe+0x63/0xe7
sin6_flowinfo is not really used by SCTP, so it will be fixed by simply
setting it to 0.
The issue exists since very beginning.
Thanks Alexander for the reproducer provided.
Reported-by: syzbot+ad5d327e6936a2e284be@syzkaller.appspotmail.com
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Willem de Bruijn [Sat, 22 Dec 2018 21:53:45 +0000 (16:53 -0500)]
packet: validate address length if non-zero
[ Upstream commit
6b8d95f1795c42161dc0984b6863e95d6acf24ed ]
Validate packet socket address length if a length is given. Zero
length is equivalent to not setting an address.
Fixes:
99137b7888f4 ("packet: validate address length")
Reported-by: Ido Schimmel <idosch@idosch.org>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Willem de Bruijn [Fri, 21 Dec 2018 17:06:59 +0000 (12:06 -0500)]
packet: validate address length
[ Upstream commit
99137b7888f4058087895d035d81c6b2d31015c5 ]
Packet sockets with SOCK_DGRAM may pass an address for use in
dev_hard_header. Ensure that it is of sufficient length.
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cong Wang [Sat, 29 Dec 2018 21:56:38 +0000 (13:56 -0800)]
netrom: fix locking in nr_find_socket()
[ Upstream commit
7314f5480f3e37e570104dc5e0f28823ef849e72 ]
nr_find_socket(), nr_find_peer() and nr_find_listener() lock the
sock after finding it in the global list. However, the call path
requires BH disabled for the sock lock consistently.
Actually the locking is unnecessary at this point, we can just hold
the sock refcnt to make sure it is not gone after we unlock the global
list, and lock it later only when needed.
Reported-and-tested-by: syzbot+f621cda8b7e598908efa@syzkaller.appspotmail.com
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Eric Dumazet [Wed, 2 Jan 2019 17:20:27 +0000 (09:20 -0800)]
isdn: fix kernel-infoleak in capi_unlocked_ioctl
[ Upstream commit
d63967e475ae10f286dbd35e189cb241e0b1f284 ]
Since capi_ioctl() copies 64 bytes after calling
capi20_get_manufacturer() we need to ensure to not leak
information to user.
BUG: KMSAN: kernel-infoleak in _copy_to_user+0x16b/0x1f0 lib/usercopy.c:32
CPU: 0 PID: 11245 Comm: syz-executor633 Not tainted 4.20.0-rc7+ #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x173/0x1d0 lib/dump_stack.c:113
kmsan_report+0x12e/0x2a0 mm/kmsan/kmsan.c:613
kmsan_internal_check_memory+0x9d4/0xb00 mm/kmsan/kmsan.c:704
kmsan_copy_to_user+0xab/0xc0 mm/kmsan/kmsan_hooks.c:601
_copy_to_user+0x16b/0x1f0 lib/usercopy.c:32
capi_ioctl include/linux/uaccess.h:177 [inline]
capi_unlocked_ioctl+0x1a0b/0x1bf0 drivers/isdn/capi/capi.c:939
do_vfs_ioctl+0xebd/0x2bf0 fs/ioctl.c:46
ksys_ioctl fs/ioctl.c:713 [inline]
__do_sys_ioctl fs/ioctl.c:720 [inline]
__se_sys_ioctl+0x1da/0x270 fs/ioctl.c:718
__x64_sys_ioctl+0x4a/0x70 fs/ioctl.c:718
do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x440019
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:
00007ffdd4659fb8 EFLAGS:
00000213 ORIG_RAX:
0000000000000010
RAX:
ffffffffffffffda RBX:
00000000004002c8 RCX:
0000000000440019
RDX:
0000000020000080 RSI:
00000000c0044306 RDI:
0000000000000003
RBP:
00000000006ca018 R08:
0000000000000000 R09:
00000000004002c8
R10:
0000000000000000 R11:
0000000000000213 R12:
00000000004018a0
R13:
0000000000401930 R14:
0000000000000000 R15:
0000000000000000
Local variable description: ----data.i@capi_unlocked_ioctl
Variable was created at:
capi_ioctl drivers/isdn/capi/capi.c:747 [inline]
capi_unlocked_ioctl+0x82/0x1bf0 drivers/isdn/capi/capi.c:939
do_vfs_ioctl+0xebd/0x2bf0 fs/ioctl.c:46
Bytes 12-63 of 64 are uninitialized
Memory access of size 64 starts at
ffff88807ac5fce8
Data copied to user address
0000000020000080
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Cc: Karsten Keil <isdn@linux-pingi.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cong Wang [Wed, 19 Dec 2018 05:17:44 +0000 (21:17 -0800)]
ipv6: explicitly initialize udp6_addr in udp_sock_create6()
[ Upstream commit
fb24274546310872eeeaf3d1d53799d8414aa0f2 ]
syzbot reported the use of uninitialized udp6_addr::sin6_scope_id.
We can just set ::sin6_scope_id to zero, as tunnels are unlikely
to use an IPv6 address that needs a scope id and there is no
interface to bind in this context.
For net-next, it looks different as we have cfg->bind_ifindex there
so we can probably call ipv6_iface_scope_id().
Same for ::sin6_flowinfo, tunnels don't use it.
Fixes:
8024e02879dd ("udp: Add udp_sock_create for UDP tunnels to open listener socket")
Reported-by: syzbot+c56449ed3652e6720f30@syzkaller.appspotmail.com
Cc: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Willem de Bruijn [Sun, 23 Dec 2018 17:52:18 +0000 (12:52 -0500)]
ieee802154: lowpan_header_create check must check daddr
[ Upstream commit
40c3ff6d5e0809505a067dd423c110c5658c478c ]
Packet sockets may call dev_header_parse with NULL daddr. Make
lowpan_header_ops.create fail.
Fixes:
87a93e4eceb4 ("ieee802154: change needed headroom/tailroom")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Acked-by: Alexander Aring <aring@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tyrel Datwyler [Mon, 31 Dec 2018 21:43:01 +0000 (15:43 -0600)]
ibmveth: fix DMA unmap error in ibmveth_xmit_start error path
[ Upstream commit
756af9c642329d54f048bac2a62f829b391f6944 ]
Commit
33a48ab105a7 ("ibmveth: Fix DMA unmap error") fixed an issue in the
normal code path of ibmveth_xmit_start() that was originally introduced by
Commit
6e8ab30ec677 ("ibmveth: Add scatter-gather support"). This original
fix missed the error path where dma_unmap_page is wrongly called on the
header portion in descs[0] which was mapped with dma_map_single. As a
result a failure to DMA map any of the frags results in a dmesg warning
when CONFIG_DMA_API_DEBUG is enabled.
------------[ cut here ]------------
DMA-API: ibmveth
30000002: device driver frees DMA memory with wrong function
[device address=0x000000000a430000] [size=172 bytes] [mapped as page] [unmapped as single]
WARNING: CPU: 1 PID: 8426 at kernel/dma/debug.c:1085 check_unmap+0x4fc/0xe10
...
<snip>
...
DMA-API: Mapped at:
ibmveth_start_xmit+0x30c/0xb60
dev_hard_start_xmit+0x100/0x450
sch_direct_xmit+0x224/0x490
__qdisc_run+0x20c/0x980
__dev_queue_xmit+0x1bc/0xf20
This fixes the API misuse by unampping descs[0] with dma_unmap_single.
Fixes:
6e8ab30ec677 ("ibmveth: Add scatter-gather support")
Signed-off-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cong Wang [Sat, 29 Dec 2018 21:56:36 +0000 (13:56 -0800)]
ax25: fix a use-after-free in ax25_fillin_cb()
[ Upstream commit
c433570458e49bccea5c551df628d058b3526289 ]
There are multiple issues here:
1. After freeing dev->ax25_ptr, we need to set it to NULL otherwise
we may use a dangling pointer.
2. There is a race between ax25_setsockopt() and device notifier as
reported by syzbot. Close it by holding RTNL lock.
3. We need to test if dev->ax25_ptr is NULL before using it.
Reported-and-tested-by: syzbot+ae6bb869cbed29b29040@syzkaller.appspotmail.com
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Gustavo A. R. Silva [Mon, 10 Dec 2018 18:41:24 +0000 (12:41 -0600)]
ipv4: Fix potential Spectre v1 vulnerability
[ Upstream commit
5648451e30a0d13d11796574919a359025d52cce ]
vr.vifi is indirectly controlled by user-space, hence leading to
a potential exploitation of the Spectre variant 1 vulnerability.
This issue was detected with the help of Smatch:
net/ipv4/ipmr.c:1616 ipmr_ioctl() warn: potential spectre issue 'mrt->vif_table' [r] (local cap)
net/ipv4/ipmr.c:1690 ipmr_compat_ioctl() warn: potential spectre issue 'mrt->vif_table' [r] (local cap)
Fix this by sanitizing vr.vifi before using it to index mrt->vif_table'
Notice that given that speculation windows are large, the policy is
to kill the speculation on the first load and not worry if it can be
completed with a dependent load/store [1].
[1] https://marc.info/?l=linux-kernel&m=
152449131114778&w=2
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Gustavo A. R. Silva [Tue, 11 Dec 2018 20:10:08 +0000 (14:10 -0600)]
ip6mr: Fix potential Spectre v1 vulnerability
[ Upstream commit
69d2c86766da2ded2b70281f1bf242cb0d58a778 ]
vr.mifi is indirectly controlled by user-space, hence leading to
a potential exploitation of the Spectre variant 1 vulnerability.
This issue was detected with the help of Smatch:
net/ipv6/ip6mr.c:1845 ip6mr_ioctl() warn: potential spectre issue 'mrt->vif_table' [r] (local cap)
net/ipv6/ip6mr.c:1919 ip6mr_compat_ioctl() warn: potential spectre issue 'mrt->vif_table' [r] (local cap)
Fix this by sanitizing vr.mifi before using it to index mrt->vif_table'
Notice that given that speculation windows are large, the policy is
to kill the speculation on the first load and not worry if it can be
completed with a dependent load/store [1].
[1] https://marc.info/?l=linux-kernel&m=
152449131114778&w=2
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Gustavo A. R. Silva [Thu, 20 Dec 2018 00:00:15 +0000 (18:00 -0600)]
drm/ioctl: Fix Spectre v1 vulnerabilities
commit
505b5240329b922f21f91d5b5d1e535c805eca6d upstream.
nr is indirectly controlled by user-space, hence leading to a
potential exploitation of the Spectre variant 1 vulnerability.
This issue was detected with the help of Smatch:
drivers/gpu/drm/drm_ioctl.c:805 drm_ioctl() warn: potential spectre issue 'dev->driver->ioctls' [r]
drivers/gpu/drm/drm_ioctl.c:810 drm_ioctl() warn: potential spectre issue 'drm_ioctls' [r] (local cap)
drivers/gpu/drm/drm_ioctl.c:892 drm_ioctl_flags() warn: potential spectre issue 'drm_ioctls' [r] (local cap)
Fix this by sanitizing nr before using it to index dev->driver->ioctls
and drm_ioctls.
Notice that given that speculation windows are large, the policy is
to kill the speculation on the first load and not worry if it can be
completed with a dependent load/store [1].
[1] https://marc.info/?l=linux-kernel&m=
152449131114778&w=2
Cc: stable@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20181220000015.GA18973@embeddedor
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Colin Ian King [Tue, 18 Dec 2018 17:29:56 +0000 (17:29 +0000)]
x86/mtrr: Don't copy uninitialized gentry fields back to userspace
commit
32043fa065b51e0b1433e48d118821c71b5cd65d upstream.
Currently the copy_to_user of data in the gentry struct is copying
uninitiaized data in field _pad from the stack to userspace.
Fix this by explicitly memset'ing gentry to zero, this also will zero any
compiler added padding fields that may be in struct (currently there are
none).
Detected by CoverityScan, CID#200783 ("Uninitialized scalar variable")
Fixes:
b263b31e8ad6 ("x86, mtrr: Use explicit sizing and padding for the 64-bit ioctls")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Tyler Hicks <tyhicks@canonical.com>
Cc: security@kernel.org
Link: https://lkml.kernel.org/r/20181218172956.1440-1-colin.king@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dexuan Cui [Thu, 13 Dec 2018 16:35:43 +0000 (16:35 +0000)]
Drivers: hv: vmbus: Return -EINVAL for the sys files for unopened channels
commit
fc96df16a1ce80cbb3c316ab7d4dc8cd5c2852ce upstream.
Before
98f4c651762c, we returned zeros for unopened channels.
With
98f4c651762c, we started to return random on-stack values.
We'd better return -EINVAL instead.
Fixes:
98f4c651762c ("hv: move ringbuffer bus attributes to dev_groups")
Cc: stable@vger.kernel.org
Cc: K. Y. Srinivasan <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Christophe Leroy [Fri, 7 Dec 2018 13:07:55 +0000 (13:07 +0000)]
gpio: max7301: fix driver for use with CONFIG_VMAP_STACK
commit
abf221d2f51b8ce7b9959a8953f880a8b0a1400d upstream.
spi_read() and spi_write() require DMA-safe memory. When
CONFIG_VMAP_STACK is selected, those functions cannot be used
with buffers on stack.
This patch replaces calls to spi_read() and spi_write() by
spi_write_then_read() which doesn't require DMA-safe buffers.
Fixes:
0c36ec314735 ("gpio: gpio driver for max7301 SPI GPIO expander")
Cc: <stable@vger.kernel.org>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>