From: Julia Lawall <julia@diku.dk>
Date: Thu, 27 May 2010 16:10:08 +0000 (+0200)
Subject: USB: host: Eliminate NULL dereference
X-Git-Tag: v2.6.36-rc1~293^2~131
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dc6eb27bdd3d214568f7d77a317c202c10222511;p=pandora-kernel.git

USB: host: Eliminate NULL dereference

The test above allows std to be NULL, so check that std is not NULL before
doing the dereference.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@r exists@
expression E,E1;
identifier f;
statement S1,S2,S3;
@@

if ((E == NULL && ...) || ...)
{
  ... when != if (...) S1 else S2
      when != E = E1
* E->f
  ... when any
}
else S3
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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