On Thu, Jun 11, 2015 at 09:43:27AM +0200, Joerg Roedel wrote:
> On Wed, Jun 10, 2015 at 06:39:20PM +0300, Dan Carpenter wrote:
> > Hello Joerg Roedel,
> >
> > The patch b61238c4a5e1: "iommu/amd: Implement dm_region call-backs"
> > from May 28, 2015, leads to the following static checker warning:
> >
> > drivers/iommu/amd_iommu.c:3153 amd_iommu_get_dm_regions()
> > error: potential null dereference 'region'. (kzalloc returns null)
>
> Thanks for the report, I added a check for the return value and folded
> it back into the original patch.
>
> What static checker do you use, btw?
I'm using Smatch.
The ERR_PTR stuff requires that you run
smatch_scripts/build_kernel_data.sh
At the start and that takes a couple hours.
regards,
dan carpenter
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