This is a note to let you know that I've just added the patch titled
iommufd: Check the domain owner of the parent before creating a nesting domain
to the 6.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
iommufd-check-the-domain-owner-of-the-parent-before-.patch
and it can be found in the queue-6.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 1af9daaec78844b588a655baf73f5b58cbec13e5
Author: Jason Gunthorpe <jgg@xxxxxxxx>
Date: Thu Aug 29 10:19:59 2024 -0300
iommufd: Check the domain owner of the parent before creating a nesting domain
[ 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@xxxxxxxxxx
Reviewed-by: Nicolin Chen <nicolinc@xxxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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(
