commit 4ca82dabc9fbf7bc5322aa54d802cb3cb7b125c5
author Minchan Kim <minchan@kernel.org> Thu Apr 13 14:56:35 2017 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> Thu Apr 13 18:24:21 2017 -0700
tree d1bdc863cfecc1caa2153006fdcc71f1f3637171
parent 045c7a3f53d9403b62d396b6d051c4be5044cdb4

zram: fix operator precedence to get offset

In zram_rw_page, the logic to get offset is wrong by operator precedence
(i.e., "<<" is higher than "&").  With wrong offset, zram can corrupt
the user's data.  This patch fixes it.

Fixes: 8c7f01025 ("zram: implement rw_page operation of zram")
Link: http://lkml.kernel.org/r/1492042622-12074-1-git-send-email-minchan@kernel.org
Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>