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| author | Phillip Lougher <phillip@lougher.demon.co.uk> | 2011-05-24 04:15:21 +0100 |
|---|---|---|
| committer | Phillip Lougher <phillip@lougher.demon.co.uk> | 2011-05-25 18:21:32 +0100 |
| commit | ac51a0a7139aa93bf1176b701c86fa3d2bdf6106 (patch) | |
| tree | 776d75b5cd1712d43feecc698b855173ed6ee57f /fs/squashfs/squashfs.h | |
| parent | 37986f63c81bf23c856f65fc5e4830550e7f3d5b (diff) | |
| download | lwn-ac51a0a7139aa93bf1176b701c86fa3d2bdf6106.tar.gz lwn-ac51a0a7139aa93bf1176b701c86fa3d2bdf6106.zip | |
Squashfs: add sanity checks to lookup table reading at mount time
Fsfuzzer generates corrupted filesystems which throw a warn_on in
kmalloc. One of these is due to a corrupted superblock inodes 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 lookup 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 0e3d220defd2..3b705f137ebb 100644 --- a/fs/squashfs/squashfs.h +++ b/fs/squashfs/squashfs.h @@ -51,7 +51,7 @@ extern const struct squashfs_decompressor *squashfs_lookup_decompressor(int); extern void *squashfs_decompressor_init(struct super_block *, unsigned short); /* export.c */ -extern __le64 *squashfs_read_inode_lookup_table(struct super_block *, u64, +extern __le64 *squashfs_read_inode_lookup_table(struct super_block *, u64, u64, unsigned int); /* fragment.c */ |