Hi Christoph,
On Thu, 15 Apr 2021 07:44:59 +0100, Christoph Hellwig
wrote:
> > *
> > * Returns 0 on success and < 0 on error.
> > @@ -28,6 +28,9 @@ int iommu_sva_alloc_pasid(struct mm_struct *mm,
> > ioasid_t min, ioasid_t max) int ret = 0;
> > ioasid_t pasid;
> >
> > + if (mm != cur
> *
> * Returns 0 on success and < 0 on error.
> @@ -28,6 +28,9 @@ int iommu_sva_alloc_pasid(struct mm_struct *mm, ioasid_t
> min, ioasid_t max)
> int ret = 0;
> ioasid_t pasid;
>
> + if (mm != current->mm)
> + return -EINVAL;
> +
Why not remove the parameter ent
The mm parameter in iommu_sva_bind_device() is intended for privileged
process perform bind() on behalf of other processes. This use case has
yet to be materialized, let alone potential security implications of
adding kernel hooks without explicit user consent.
In addition, with the agreement that
