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

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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: bd529dbb66 ("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: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Jason Gunthorpe 2024-08-29 10:19:59 -03:00
parent 76889bbaab
commit 73183ad6ea
1 changed files with 2 additions and 1 deletions
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3
drivers/iommu/iommufd/hw_pagetable.c
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@ -225,7 +225,8 @@ iommufd_hwpt_nested_alloc(struct iommufd_ctx *ictx,
if ((flags & ~IOMMU_HWPT_FAULT_ID_VALID) || if ((flags & ~IOMMU_HWPT_FAULT_ID_VALID) ||
!user_data->len || !ops->domain_alloc_user) !user_data->len || !ops->domain_alloc_user)
return ERR_PTR(-EOPNOTSUPP); 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); return ERR_PTR(-EINVAL);
hwpt_nested = __iommufd_object_alloc( hwpt_nested = __iommufd_object_alloc(