Re: [Xen-devel] [PATCH for-4.13] xen/xsm: flask: Prevent NULL deference in flask_assign_{, dt}device()

[Jürgen Groß <jgross@xxxxxxxx>]

On 04.10.19 18:42, Julien Grall wrote:
> flask_assign_{, dt}device() may be used to check whether you can test if
> a device is assigned. In this case, the domain will be NULL.
>
> However, flask_iommu_resource_use_perm() will be called and may end up
> to deference a NULL pointer. This can be prevented by moving the call
> after we check the validity for the domain pointer.
>
> Coverity-ID: 1486741
> Fixes: 71e617a6b8 ('use is_iommu_enabled() where appropriate...')
> Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
Release-acked-by: Juergen Gross <jgross@xxxxxxxx>


Juergen

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