From: Jan Kara <jack@suse.cz>
Date: Fri, 31 May 2013 23:37:56 +0000 (-0400)
Subject: ext4: fix overflows in SEEK_HOLE, SEEK_DATA implementations
X-Git-Tag: omap-for-v3.11/fixes-for-merge-window~83^2~62
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e7293fd146846e2a44d29e0477e0860c60fb856b;p=pandora-kernel.git

ext4: fix overflows in SEEK_HOLE, SEEK_DATA implementations

ext4_lblk_t is just u32 so multiplying it by blocksize can easily
overflow for files larger than 4 GB. Fix that by properly typing the
block offsets before shifting.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>
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