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A couple of minor additional sanity check patches for corrupted information,

Browse source 
and some fixes.  Apart from that there's a minor loop optimisation.
 
 These sanity checks mainly exist to trap maliciously corrupted
 filesystems either through using a deliberately modified mksquashfs,
 or where the user has deliberately chosen to generate uncompressed
 metadata and then corrupted it.
 
 Normally metadata in Squashfs filesystems is compressed, which means
 corruption (either accidental or malicious) is detected when
 trying to decompress the metadata.  So corrupted data does not normally
 get as far as the code paths in question here.
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Merge tag 'squashfs-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-next

Pull squashfs updates from Phillip Lougher:
 "A couple of minor additional sanity check patches for corrupted
  information, and some fixes.  Apart from that there's a minor loop
  optimisation.

  These sanity checks mainly exist to trap maliciously corrupted
  filesystems either through using a deliberately modified mksquashfs,
  or where the user has deliberately chosen to generate uncompressed
  metadata and then corrupted it.

  Normally metadata in Squashfs filesystems is compressed, which means
  corruption (either accidental or malicious) is detected when trying to
  decompress the metadata.  So corrupted data does not normally get as
  far as the code paths in question here"

* tag 'squashfs-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-next:
  Squashfs: add corruption check for type in squashfs_readdir()
  Squashfs: add corruption check in get_dir_index_using_offset()
  Squashfs: fix corruption checks in squashfs_readdir()
  Squashfs: fix corruption checks in squashfs_lookup()
  Squashfs: fix corruption check in get_dir_index_using_name()
  Squashfs: Optimized uncompressed buffer loop
  Squashfs: sanity check information from disk
This commit is contained in:
Linus Torvalds 2013-09-11 12:33:12 -07:00
commit 53bf710832
4 changed files with 27 additions and 14 deletions
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