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 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu