From: Yi Zou <yi.zou@intel.com>
Date: Tue, 14 Aug 2012 23:06:43 +0000 (-0700)
Subject: target: fix NULL pointer dereference bug alloc_page() fails to get memory
X-Git-Tag: v3.2.29~58
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=077bfcc044b6ec6f780bc53b206dd1ba10aa2cd3;p=pandora-kernel.git

target: fix NULL pointer dereference bug alloc_page() fails to get memory

commit d0e27c88d795fb9647153063ec48051fd84e1731 upstream.

I am hitting this bug when the target is low in memory that fails the
alloc_page() for the newly submitted command. This is a sort of off-by-one
bug causing NULL pointer dereference in __free_page() since 'i' here is
really the counter of total pages that have been successfully allocated here.

Signed-off-by: Yi Zou <yi.zou@intel.com>
Cc: Andy Grover <agrover@redhat.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Open-FCoE.org <devel@open-fcoe.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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