Commit 73183ad6 authored by Jason Gunthorpe's avatar Jason Gunthorpe
Browse files

iommufd: Check the domain owner of the parent before creating a nesting domain 

This check was missed, before we can pass a struct iommu_domain to a
driver callback we need to validate that the domain was created by that
driver.

Fixes: bd529dbb ("iommufd: Add a nested HW pagetable object")
Link: https://patch.msgid.link/r/0-v1-c8770519edde+1a-iommufd_nesting_ops_jgg@nvidia.com


Reviewed-by: default avatarNicolin Chen <nicolinc@nvidia.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@nvidia.com>
parent 76889bba

drivers/iommu/iommufd/hw_pagetable.c

+2 −1
Original line number Diff line number Diff line
@@ -225,7 +225,8 @@ iommufd_hwpt_nested_alloc(struct iommufd_ctx *ictx, 
	if ((flags & ~IOMMU_HWPT_FAULT_ID_VALID) ||

	    !user_data->len || !ops->domain_alloc_user)

		return ERR_PTR(-EOPNOTSUPP);

	if (parent->auto_domain || !parent->nest_parent)

	if (parent->auto_domain || !parent->nest_parent ||

	    parent->common.domain->owner != ops)

		return ERR_PTR(-EINVAL);



	hwpt_nested = __iommufd_object_alloc(