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| author | Phillip Lougher <phillip@lougher.demon.co.uk> | 2011-05-24 04:05:22 +0100 |
|---|---|---|
| committer | Phillip Lougher <phillip@lougher.demon.co.uk> | 2011-05-25 18:21:32 +0100 |
| commit | 37986f63c81bf23c856f65fc5e4830550e7f3d5b (patch) | |
| tree | aafcc2078b469fb8fdb6e43255e136fcc7059dc9 /fs/squashfs/xattr.h | |
| parent | 6f04864515365e135adc9f1cee4ac1251bb0ed35 (diff) | |
Squashfs: add sanity checks to id reading at mount time
Fsfuzzer generates corrupted filesystems which throw a warn_on in
kmalloc. One of these is due to a corrupted superblock no_ids 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 id table
structures.
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
Diffstat (limited to 'fs/squashfs/xattr.h')
| -rw-r--r-- | fs/squashfs/xattr.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/squashfs/xattr.h b/fs/squashfs/xattr.h index b634efce4bd..9b3dd6c4c1f 100644 --- a/fs/squashfs/xattr.h +++ b/fs/squashfs/xattr.h @@ -31,6 +31,7 @@ static inline __le64 *squashfs_read_xattr_id_table(struct super_block *sb, u64 start, u64 *xattr_table_start, int *xattr_ids) { ERROR("Xattrs in filesystem, these will be ignored\n"); + *xattr_table_start = start; return ERR_PTR(-ENOTSUPP); } |