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authorPhillip Lougher <phillip@lougher.demon.co.uk>2011-05-24 04:33:34 +0100
committerPhillip Lougher <phillip@lougher.demon.co.uk>2011-05-25 18:21:33 +0100
commit1cac63cc9b2ff0d16ab2d16232b1a6ee8676a47b (patch)
tree31ee36dac4a1b351c153058ffa0799a959ba0272 /fs/squashfs/squashfs.h
parentac51a0a7139aa93bf1176b701c86fa3d2bdf6106 (diff)
downloadlinux-next-1cac63cc9b2ff0d16ab2d16232b1a6ee8676a47b.tar.gz
Squashfs: add sanity checks to fragment reading at mount time
Fsfuzzer generates corrupted filesystems which throw a warn_on in kmalloc. One of these is due to a corrupted superblock fragments field. Fix this by checking that the number of bytes to be read (and allocated) does not extend into the next filesystem structure. Also add a couple of other sanity checks of the mount-time fragment table structures. Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
Diffstat (limited to 'fs/squashfs/squashfs.h')
-rw-r--r--fs/squashfs/squashfs.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/squashfs/squashfs.h b/fs/squashfs/squashfs.h
index 3b705f137ebb..647b81b477d4 100644
--- a/fs/squashfs/squashfs.h
+++ b/fs/squashfs/squashfs.h
@@ -57,7 +57,7 @@ extern __le64 *squashfs_read_inode_lookup_table(struct super_block *, u64, u64,
/* fragment.c */
extern int squashfs_frag_lookup(struct super_block *, unsigned int, u64 *);
extern __le64 *squashfs_read_fragment_index_table(struct super_block *,
- u64, unsigned int);
+ u64, u64, unsigned int);
/* id.c */
extern int squashfs_get_id(struct super_block *, unsigned int, unsigned int *);