OSDN Git Service

virtiofsd: Set up posix_lock hash table for root inode
authorVivek Goyal <vgoyal@redhat.com>
Mon, 7 Dec 2020 19:55:39 +0000 (14:55 -0500)
committerDr. David Alan Gilbert <dgilbert@redhat.com>
Fri, 18 Dec 2020 10:08:24 +0000 (10:08 +0000)
commitad3bfe1bd6d07b086738f0e537a8f3c9b1ab65a6
tree87a9c160a7d7c0f652589056fbbbf0980c571321
parentbebc3c24aa54b747b19112f9199181a49614f44c
virtiofsd: Set up posix_lock hash table for root inode

We setup per inode hash table ->posix_lock to support remote posix locks.
But we forgot to initialize this table for root inode.

Laszlo managed to trigger an issue where he sent a FUSE_FLUSH request for
root inode and lo_flush() found inode with inode->posix_lock NULL and
accessing this table crashed virtiofsd.

May be we can get rid of initializing this hash table for directory
objects completely. But that optimization is for another day.

Reported-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Message-Id: <20201207195539.GB3107@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
tools/virtiofsd/passthrough_ll.c