Re: [PATCH] scsi: pm8001: pm8001_hwi.c: Fix for possible null pointer dereference

From: Tomas Henzl
Date: Wed May 28 2014 - 07:38:56 EST


On 05/28/2014 01:28 PM, Christoph Hellwig wrote:
> On Sun, May 18, 2014 at 06:14:00PM +0200, Rickard Strandqvist wrote:
>> There is otherwise a risk of a possible null pointer dereference.
>>
>> Was largely found by using a static code analysis program called cppcheck.
> I can't see how dev->lldd_dev would be NULL here.

The analysis program likely can't know that, the reason for this report
it that dev->lldd_dev is tested for not being null several lines below -
http://lxr.free-electrons.com/source/drivers/scsi/pm8001/pm8001_hwi.c#L4447
So the other option is to remove this^ test.

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