From: Tony Battersby <tonyb@cybernetics.com>
Date: Mon, 8 Dec 2014 22:20:52 +0000 (-0500)
Subject: scsi: fix random memory corruption with scsi-mq + T10 PI
X-Git-Tag: omap-for-v3.19/fixes-rc1~11^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=120bb3e1e36da9c1ae6b978c825a28b944a5d7c5;p=pandora-kernel.git

scsi: fix random memory corruption with scsi-mq + T10 PI

This fixes random memory corruption triggered when all three of the
following are true:

* scsi-mq enabled
* T10 Protection Information (DIF) enabled
* SCSI host with sg_tablesize > SCSI_MAX_SG_SEGMENTS (128)

The symptoms of this bug are unpredictable memory corruption, BUG()s,
oopses, lockups, etc., any of which may appear to be completely
unrelated to the root cause.

Cc: <stable@vger.kernel.org> # 3.17.x, 3.18.x
Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Reviewed-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---

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