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Groups > linux.kernel > #1413281

[PATCH] iommu/vt-d: fix overflow of iommu->domains array

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The valid range of did in get_iommu_domain(*iommu, did)
is 0..cap_ndoms(iommu->cap), so don't exceed that
range in free_all_cpu_cached_iovas().

Signed-off-by: Jan Niehusmann <jan@gondor.com>
---
 drivers/iommu/intel-iommu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index a644d0c..82989d4 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -4600,7 +4600,7 @@ static void free_all_cpu_cached_iovas(unsigned int cpu)
 		if (!iommu)
 			continue;
 
-		for (did = 0; did < 0xffff; did++) {
+		for (did = 0; did < cap_ndoms(iommu->cap); did++) {
 			domain = get_iommu_domain(iommu, did);
 
 			if (!domain)
-- 
2.1.4

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Suspend broken on Thinkpad x201s since 4.7-rc1 Jan Niehusmann <jan@gondor.com> - 2016-06-02 13:10 +0200
  [PATCH] iommu/vt-d: fix overflow of iommu->domains array Jan Niehusmann <jan@gondor.com> - 2016-06-03 17:00 +0200

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