diff options
| author | Phillip Lougher <phillip@lougher.demon.co.uk> | 2011-03-15 22:09:55 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-04-14 16:53:11 -0700 |
| commit | 6f5ff91733db188b0cbcc59482dbc7e20b17d56d (patch) | |
| tree | 7f65f8d6782c98bffe29e2ba7b8539ec91216f08 /lib/kernel_lock.c | |
| parent | 98eec152c36e9544a81fa709d0eb2cf028cf4cdb (diff) | |
Squashfs: handle corruption of directory structure
commit 44cff8a9ee8a974f9e931df910688e7fc1f0b0f9 upstream.
Handle the rare case where a directory metadata block is uncompressed and
corrupted, leading to a kernel oops in directory scanning (memcpy).
Normally corruption is detected at the decompression stage and dealt with
then, however, this will not happen if:
- metadata isn't compressed (users can optionally request no metadata
compression), or
- the compressed metadata block was larger than the original, in which
case the uncompressed version was used, or
- the data was corrupt after decompression
This patch fixes this by adding some sanity checks against known maximum
values.
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'lib/kernel_lock.c')
0 files changed, 0 insertions, 0 deletions