From: Stefan Richter <stefanr@s5r6.in-berlin.de>
Date: Sun, 1 Jul 2007 11:56:03 +0000 (+0200)
Subject: firewire: fw-sbp2: add a boundary check
X-Git-Tag: v2.6.23-rc1~1199^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=332ef3310bc37ff29fd4382d6dfb38a787078091;p=pandora-kernel.git

firewire: fw-sbp2: add a boundary check

Add rudimentary check for the case that the page table overflows due to
merging of s/g elements by the IOMMU.  This would have lead to
overwriting of arbitrary memory.

After this change I expect that an offending command will be
unsuccessfully retried until the scsi_device is taken offline by SCSI
core.  It's a border case and not worth to implement a recovery
strategy.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Acked-by: Kristian Høgsberg <krh@redhat.com>
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