Re: [PATCH v2] iommufd/selftest: Remove MOCK_IOMMUPT_AMDV1 format

[Jason Gunthorpe <jgg@ziepe.ca>]

On Mon, Mar 30, 2026 at 09:26:09AM +0000, Pranjal Shrivastava wrote:
> syzbot found that allocating a mock domain with AMDV1 format could
> cause a WARN_ON because the selftest enabled DYNAMIC_TOP without
> providing the required driver_ops.
> 
> The AMDV1 format in the selftest was a placeholder and was not actually
> used by any of the existing selftests. Instead of adding dummy
> driver_ops to satisfy the requirements of a format we don't currently
> test, remove the AMDV1 format option from the selftest.
> 
> The MOCK_IOMMUPT_DEFAULT and MOCK_IOMMUPT_HUGE formats are unaffected as
> they use the amdv1_mock variant which does not enable DYNAMIC_TOP.
> 
> Fixes: dcd6a011a8d5 ("iommupt: Add map_pages op")
> Reported-by: syzbot+453eb7add07c3767adab@syzkaller.appspotmail.com
> Closes: https://lore.kernel.org/all/69c1d50b.a70a0220.3cae05.0001.GAE@google.com/
> Signed-off-by: Pranjal Shrivastava <praan@google.com>
> ---
>  drivers/iommu/iommufd/iommufd_test.h |  1 -
>  drivers/iommu/iommufd/selftest.c     | 31 ----------------------------
>  2 files changed, 32 deletions(-)

Applied to for-next

Thanks,
Jason