From: Bob Copeland <me@bobcopeland.com>
Date: Fri, 15 Aug 2008 07:40:47 +0000 (-0700)
Subject: omfs: fix oops when file metadata is corrupted
X-Git-Tag: v2.6.27-rc4~70
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9419fc1c957d600093baaea247fef23cca3b4e93;p=pandora-kernel.git

omfs: fix oops when file metadata is corrupted

A fuzzed fileystem image failed with OMFS when the extent count was
used in a loop without being checked against the max number of extents.
It also provoked a signed division for an array index that was checked
as if unsigned, leading to index by -1.

omfsck will be updated to fix these cases, in the meantime bail out
gracefully.

Reported-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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