[PATCH] kdump proc vmcore size oveflow fix

A couple of /proc/vmcore data structures overflow with 32bit systems having
memory more than 4G.  This patch fixes those.

Signed-off-by: Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp>
Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
index 7efa73d..20d4b22 100644 (file)
--- a/fs/proc/vmcore.c
+++ b/fs/proc/vmcore.c
@@ -103,8 +103,8 @@ static ssize_t read_vmcore(struct file *file, char __user *buffer,
                                size_t buflen, loff_t *fpos)
 {
        ssize_t acc = 0, tmp;
-       size_t tsz, nr_bytes;
-       u64 start;
+       size_t tsz;
+       u64 start, nr_bytes;
        struct vmcore *curr_m = NULL;
 
        if (buflen == 0 || *fpos >= vmcore_size)

diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index 135871d..4b47a02 100644 (file)
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -79,7 +79,7 @@ struct kcore_list {
 struct vmcore {
        struct list_head list;
        unsigned long long paddr;
-       unsigned long size;
+       unsigned long long size;
        loff_t offset;
 };