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| author | Phillip Lougher <phillip@lougher.demon.co.uk> | 2011-05-24 07:33:34 +0400 |
|---|---|---|
| committer | Phillip Lougher <phillip@lougher.demon.co.uk> | 2011-05-25 21:21:33 +0400 |
| commit | 1cac63cc9b2ff0d16ab2d16232b1a6ee8676a47b (patch) | |
| tree | 31ee36dac4a1b351c153058ffa0799a959ba0272 /fs/squashfs/squashfs.h | |
| parent | ac51a0a7139aa93bf1176b701c86fa3d2bdf6106 (diff) | |
| download | linux-1cac63cc9b2ff0d16ab2d16232b1a6ee8676a47b.tar.xz | |
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.h | 2 |
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 *); |