From: Mahesh Rajashekhara <Mahesh.Rajashekhara@pmcs.com>
Date: Thu, 31 Oct 2013 08:31:02 +0000 (+0530)
Subject: aacraid: prevent invalid pointer dereference
X-Git-Tag: v3.13-rc1~32
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b4789b8e6be3151a955ade74872822f30e8cd914;p=pandora-kernel.git

aacraid: prevent invalid pointer dereference

It appears that driver runs into a problem here if fibsize is too small
because we allocate user_srbcmd with fibsize size only but later we
access it until user_srbcmd->sg.count to copy it over to srbcmd.

It is not correct to test (fibsize < sizeof(*user_srbcmd)) because this
structure already includes one sg element and this is not needed for
commands without data.  So, we would recommend to add the following
(instead of test for fibsize == 0).

Signed-off-by: Mahesh Rajashekhara <Mahesh.Rajashekhara@pmcs.com>
Reported-by: Nico Golde <nico@ngolde.de>
Reported-by: Fabian Yamaguchi <fabs@goesec.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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