diff options
| author | Andi Kleen <ak@suse.de> | 2005-09-13 14:01:08 +0200 |
|---|---|---|
| committer | Chris Wright <chrisw@osdl.org> | 2005-09-16 18:01:58 -0700 |
| commit | 9c053068c7b8158850d680d8c96f3f11f5804367 (patch) | |
| tree | f9ff24f8f82d168e849bd7131ba21d59e4d707f3 | |
| parent | 81ddd439761f2f2e6837f9746c83864f410a4077 (diff) | |
[PATCH] Fix MPOL_F_VERIFY
There was a pretty bad bug in there that the code would
always check the full VMA, not the range the user requested.
When the VMA to be checked was merged with the previous VMA this
could lead to spurious failures.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Chris Wright <chrisw@osdl.org>
| -rw-r--r-- | mm/mempolicy.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c index b4eababc8198..54b522c7b015 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -333,8 +333,13 @@ check_range(struct mm_struct *mm, unsigned long start, unsigned long end, if (prev && prev->vm_end < vma->vm_start) return ERR_PTR(-EFAULT); if ((flags & MPOL_MF_STRICT) && !is_vm_hugetlb_page(vma)) { + unsigned long endvma = vma->vm_end; + if (endvma > end) + endvma = end; + if (vma->vm_start > start) + start = vma->vm_start; err = check_pgd_range(vma->vm_mm, - vma->vm_start, vma->vm_end, nodes); + start, endvma, nodes); if (err) { first = ERR_PTR(err); break; |