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

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BugLink: https://bugs.launchpad.net/bugs/2089340

[ Upstream commit 73183ad6ea51029d04b098286dcee98d715015f1 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Portia Stephens <portia.stephens@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Jason Gunthorpe
2024-08-29 10:19:59 -03:00
committed by Mehmet Basaran
parent eb0538f610
commit ca12a1abd7
1 changed files with 2 additions and 1 deletions
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drivers/iommu/iommufd/hw_pagetable.c
+2 -1
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@@ -215,7 +215,8 @@ iommufd_hwpt_nested_alloc(struct iommufd_ctx *ictx,
if (flags || !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(