From bd384364c1185ecb01f3b8242c915ccb5921c60d Mon Sep 17 00:00:00 2001
From: Zheng Liu <wenqing.lz@taobao.com>
Date: Sun, 10 Mar 2013 20:48:59 -0400
Subject: [PATCH] ext4: avoid a potential overflow in ext4_es_can_be_merged()

Check the length of an extent to avoid a potential overflow in
ext4_es_can_be_merged().

Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Dmitry Monakhov <dmonakhov@openvz.org>
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Reading git-format-patch failed