From: Luis Henriques <luis.henriques@canonical.com>
Date: Wed, 11 Jul 2012 21:02:10 +0000 (-0700)
Subject: ocfs2: fix NULL pointer dereference in __ocfs2_change_file_space()
X-Git-Tag: v3.5-rc7~23^2~23
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a4e08d001f2e50bb8b3c4eebadcf08e5535f02ee;p=pandora-kernel.git

ocfs2: fix NULL pointer dereference in __ocfs2_change_file_space()

As ocfs2_fallocate() will invoke __ocfs2_change_file_space() with a NULL
as the first parameter (file), it may trigger a NULL pointer dereferrence
due to a missing check.

Addresses http://bugs.launchpad.net/bugs/1006012

Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Reported-by: Bret Towe <magnade@gmail.com>
Tested-by: Bret Towe <magnade@gmail.com>
Cc: Sunil Mushran <sunil.mushran@oracle.com>
Acked-by: Joel Becker <jlbec@evilplan.org>
Acked-by: Mark Fasheh <mfasheh@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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