From: Lukas Czerner <lczerner@redhat.com>
Date: Mon, 22 Oct 2012 22:01:19 +0000 (-0400)
Subject: ext4: Avoid underflow in ext4_trim_fs()
X-Git-Tag: v3.7-rc3~47^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5de35e8d5c02d271c20e18337e01bc20e6ef472e;p=pandora-kernel.git

ext4: Avoid underflow in ext4_trim_fs()

Currently if len argument in ext4_trim_fs() is smaller than one block,
the 'end' variable underflow. Avoid that by returning EINVAL if len is
smaller than file system block.

Also remove useless unlikely().

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@vger.kernel.org
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