This is a note to let you know that I've just added the patch titled
iommu/amd: Handle large pages correctly in free_pagetable
to the 3.14-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-amd-handle-large-pages-correctly-in-free_pagetable.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 0b3fff54bc01e8e6064d222a33e6fa7adabd94cd Mon Sep 17 00:00:00 2001
From: Joerg Roedel <jroedel@xxxxxxx>
Date: Thu, 18 Jun 2015 10:48:34 +0200
Subject: iommu/amd: Handle large pages correctly in free_pagetable
From: Joerg Roedel <jroedel@xxxxxxx>
commit 0b3fff54bc01e8e6064d222a33e6fa7adabd94cd upstream.
Make sure that we are skipping over large PTEs while walking
the page-table tree.
Fixes: 5c34c403b723 ("iommu/amd: Fix memory leak in free_pagetable")
Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iommu/amd_iommu.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -1922,9 +1922,15 @@ static void free_pt_##LVL (unsigned long
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); \
} \
Patches currently in stable-queue which might be from jroedel@xxxxxxx are
queue-3.14/iommu-amd-handle-large-pages-correctly-in-free_pagetable.patch
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