From: Jaegeuk Kim <jaegeuk@kernel.org>
Date: Mon, 8 Sep 2014 17:59:43 +0000 (-0700)
Subject: f2fs: fix negative value for lseek offset
X-Git-Tag: fixes-for-v3.18-merge-window~8^2~31
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0b4c5afde9b57c08b55d26725d228d5314cfc57a;p=pandora-kernel.git

f2fs: fix negative value for lseek offset

If application throws negative value of lseek with SEEK_DATA|SEEK_HOLE,
previous f2fs went into BUG_ON in get_dnode_of_data, which was reported
by Tommi Rantala.

He could make a simple code to detect this having:
	lseek(fd, -17595150933902LL, SEEK_DATA);

This patch should resolve that bug.

Reported-by: Tommi Rentala <tt.rantala@gmail.com>
[Jaegeuk Kim: relocate the condition as suggested by Chao]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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