diff options
| author | Andrea Arcangeli <aarcange@redhat.com> | 2010-08-02 20:40:44 +0200 |
|---|---|---|
| committer | Andrea Arcangeli <aarcange@redhat.com> | 2010-08-02 18:43:03 +0000 |
| commit | a79fef2988391b4436f43cd6d5c3a176094fb541 (patch) | |
| tree | c15dbdd687b77286df58505b65a7506f9d49b9d0 | |
| parent | 5e284e4e651b9b70bf704b431422f740c7e26d0d (diff) | |
resurrect the check in page_address_in_vma
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@redhat.com>
| -rw-r--r-- | mm/rmap.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index f56e9b5f7c31..ab6c7d0d9b46 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -363,9 +363,10 @@ vma_address(struct page *page, struct vm_area_struct *vma) */ 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; |