From: Julia Lawall <julia@diku.dk>
Date: Mon, 22 Mar 2010 08:11:55 +0000 (+0800)
Subject: [ARM] pxa: avoid NULL dereferencing in error handling of ssp.c
X-Git-Tag: v2.6.35-rc1~503^2~1^2~2^2~39
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=077de1ad5ad8b4e08fd8853ae7e4cc628c1a369b;p=pandora-kernel.git

[ARM] pxa: avoid NULL dereferencing in error handling of ssp.c

The assignments of res to the results of the two calls to
platform_get_resource make it impossible to use res in the error handling
code in the arguments to release_mem_region.

The semantic match that finds the former problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r exists@
expression E, E1;
identifier f;
statement S1,S3;
iterator iter;
@@

if ((E == NULL && ...) || ...)
{
 ... when != false ((E == NULL && ...) || ...)
     when != true  ((E != NULL && ...) || ...)
     when != iter(E,...) S1
     when != E = E1
(
 sizeof(E->f)
|
* E->f
)
 ... when any
 return ...;
}
else S3
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
---

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