The patch titled
reiserfs: possible null pointer dereference during resize
has been added to the -mm tree. Its filename is
reiserfs-possible-null-pointer-dereference-during-resize.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: reiserfs: possible null pointer dereference during resize
From: Dmitriy Monakhov <dmonakhov@xxxxx>
sb_read may return NULL, let's explicitly check it.
If so free new bitmap blocks array, after this we may safely exit as it done
above during bitmap allocation.
Signed-off-by: Dmitriy Monakhov <dmonakhov@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/reiserfs/resize.c | 4 ++++
1 file changed, 4 insertions(+)
diff -puN fs/reiserfs/resize.c~reiserfs-possible-null-pointer-dereference-during-resize fs/reiserfs/resize.c
--- a/fs/reiserfs/resize.c~reiserfs-possible-null-pointer-dereference-during-resize
+++ a/fs/reiserfs/resize.c
@@ -131,6 +131,10 @@ int reiserfs_resize(struct super_block *
/* don't use read_bitmap_block since it will cache
* the uninitialized bitmap */
bh = sb_bread(s, i * s->s_blocksize * 8);
+ if (!bh) {
+ vfree(bitmap);
+ return -EIO;
+ }
memset(bh->b_data, 0, sb_blocksize(sb));
reiserfs_test_and_set_le_bit(0, bh->b_data);
reiserfs_cache_bitmap_metadata(s, bh, bitmap + i);
_
Patches currently in -mm which might be from dmonakhov@xxxxx are
freevxfs-possible-null-pointer-dereference-fix.patch
reiserfs-possible-null-pointer-dereference-during-resize.patch
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
