tree 776d75b5cd1712d43feecc698b855173ed6ee57f
parent 37986f63c81bf23c856f65fc5e4830550e7f3d5b
author Phillip Lougher <phillip@lougher.demon.co.uk> 1306206921 +0100
committer Phillip Lougher <phillip@lougher.demon.co.uk> 1306344092 +0100

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>