6.10-stable review patch. If anyone has any objections, please let me know.
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From: Jason Gunthorpe jgg@nvidia.com
[ 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: bd529dbb661d ("iommufd: Add a nested HW pagetable object") Link: https://patch.msgid.link/r/0-v1-c8770519edde+1a-iommufd_nesting_ops_jgg@nvid... Reviewed-by: Nicolin Chen nicolinc@nvidia.com Signed-off-by: Jason Gunthorpe jgg@nvidia.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iommu/iommufd/hw_pagetable.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/iommufd/hw_pagetable.c b/drivers/iommu/iommufd/hw_pagetable.c index a9f1fe44c4c0b..21f0d8cbd7aad 100644 --- a/drivers/iommu/iommufd/hw_pagetable.c +++ b/drivers/iommu/iommufd/hw_pagetable.c @@ -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(