The patch titled
rmap: resurrect page_address_in_vma anon_vma check
has been added to the -mm tree. Its filename is
rmap-resurrect-page_address_in_vma-anon_vma-check.patch
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------------------------------------------------------
Subject: rmap: resurrect page_address_in_vma anon_vma check
From: Andrea Arcangeli <aarcange@xxxxxxxxxx>
With root anon-vma it's trivial to keep doing the usual check as in
old-anon-vma code.
Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Signed-off-by: Rik van Riel <riel@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/rmap.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff -puN mm/rmap.c~rmap-resurrect-page_address_in_vma-anon_vma-check mm/rmap.c
--- a/mm/rmap.c~rmap-resurrect-page_address_in_vma-anon_vma-check
+++ a/mm/rmap.c
@@ -367,9 +367,10 @@ vma_address(struct page *page, struct vm
*/
unsigned long page_address_in_vma(struct page *page, struct vm_area_struct *vma)
{
- if (PageAnon(page))
- ;
- else if (page->mapping && !(vma->vm_flags & VM_NONLINEAR)) {
+ if (PageAnon(page)) {
+ if (vma->anon_vma->root != page_anon_vma(page)->root)
+ return -EFAULT;
+ } else if (page->mapping && !(vma->vm_flags & VM_NONLINEAR)) {
if (!vma->vm_file ||
vma->vm_file->f_mapping != page->mapping)
return -EFAULT;
_
Patches currently in -mm which might be from aarcange@xxxxxxxxxx are
linux-next.patch
hugetlb-call-mmu-notifiers-on-hugepage-cow.patch
define-madv_hugepage.patch
mmap-remove-unnecessary-lock-from-__vma_link.patch
rmap-always-add-new-vmas-at-the-end.patch
ksm-fix-ksm-swapin-time-optimization.patch
rmap-always-use-anon_vma-root-pointer.patch
rmap-resurrect-page_address_in_vma-anon_vma-check.patch
add-anon_vma-bug-checks.patch
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