diff options
| author | Joerg Roedel <jroedel@suse.de> | 2015-06-18 10:48:34 +0200 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2015-07-13 08:50:07 -0400 |
| commit | f4edd6d5e39a5340b6c01dce0fbd5e2d61427973 (patch) | |
| tree | a9fad1654cf8495da8b209edcaa5df733ff87c8a /drivers/iommu | |
| parent | 8729369484a2c655c5f351ad507e6bf099bc8f5e (diff) | |
iommu/amd: Handle large pages correctly in free_pagetable
[ Upstream commit 0b3fff54bc01e8e6064d222a33e6fa7adabd94cd ]
Make sure that we are skipping over large PTEs while walking
the page-table tree.
Cc: stable@kernel.org
Fixes: 5c34c403b723 ("iommu/amd: Fix memory leak in free_pagetable")
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 505a9adac2d5..fab0ea1a46d1 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -1870,9 +1870,15 @@ 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 (PM_PTE_LEVEL(pt[i]) == 0 || \ + PM_PTE_LEVEL(pt[i]) == 7) \ + continue; \ + \ p = (unsigned long)IOMMU_PTE_PAGE(pt[i]); \ FN(p); \ } \ |