This is a note to let you know that I've just added the patch titled
iommu/vt-d: Fix identity map bounds in si_domain_init()
to the 6.6-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:
iommu-vt-d-fix-identity-map-bounds-in-si_domain_init.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 891dfa570e8f0b630fa3da3d69f0dd25d232fa76
Author: Jon Pan-Doh <pandoh@xxxxxxxxxx>
Date: Tue Jul 9 16:49:13 2024 -0700
iommu/vt-d: Fix identity map bounds in si_domain_init()
[ Upstream commit 31000732d56b43765d51e08cccb68818fbc0032c ]
Intel IOMMU operates on inclusive bounds (both generally aas well as
iommu_domain_identity_map()). Meanwhile, for_each_mem_pfn_range() uses
exclusive bounds for end_pfn. This creates an off-by-one error when
switching between the two.
Fixes: c5395d5c4a82 ("intel-iommu: Clean up iommu_domain_identity_map()")
Signed-off-by: Jon Pan-Doh <pandoh@xxxxxxxxxx>
Tested-by: Sudheer Dantuluri <dantuluris@xxxxxxxxxx>
Suggested-by: Gary Zibrat <gzibrat@xxxxxxxxxx>
Reviewed-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
Link: https://lore.kernel.org/r/20240709234913.2749386-1-pandoh@xxxxxxxxxx
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 744e4e6b8d72d..9918af222c516 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -2411,7 +2411,7 @@ static int __init si_domain_init(int hw)
for_each_mem_pfn_range(i, nid, &start_pfn, &end_pfn, NULL) {
ret = iommu_domain_identity_map(si_domain,
mm_to_dma_pfn_start(start_pfn),
- mm_to_dma_pfn_end(end_pfn));
+ mm_to_dma_pfn_end(end_pfn-1));
if (ret)
return ret;
}
