From: Joerg Roedel <jroe...@suse.de>
Make sure that we are skipping over large PTEs while walking
the page-table tree.
Cc: sta...@kernel.org
Fixes: 5c34c403b723 ("iommu/amd: Fix memory leak in free_pagetable")
Signed-off-by: Joerg Roedel <jroe...@suse.de>
---
drivers/iommu/amd_iommu.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 79892d2..45532ff 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -1749,9 +1749,15 @@ static void free_pt_##LVL (unsigned long __pt)
\
pt = (u64 *)__pt; \
\
for (i = 0; i < 512; ++i) { \
+ /* PTE present? */ \
if (!IOMMU_PTE_PRESENT(pt[i])) \
continue; \
\
+ /* Large PTE? */ \
+ if (IOMMU_PTE_MODE(pt[i]) == 0 || \
+ IOMMU_PTE_MODE(pt[i]) == 7) \
+ continue; \
+ \
p = (unsigned long)IOMMU_PTE_PAGE(pt[i]); \
FN(p); \
} \
--
1.9.1
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