From: Dmitry Monakhov <dmonakhov@openvz.org>
Date: Sun, 13 Apr 2014 19:41:13 +0000 (-0400)
Subject: ext4: always check ext4_ext_find_extent result
X-Git-Tag: omap-for-v3.16/soc-signed~31^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a18ed359bdddcded4f97ff5e2f07793ff9336913;p=pandora-kernel.git

ext4: always check ext4_ext_find_extent result

Where are some places where logic guaranties us that extent we are
searching exits, but this may not be true due to on-disk data
corruption. If such corruption happens we must prevent possible
null pointer dereferences.

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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