VMA and its address bounds checks are too late in this function.
They must have been verified earlier in the page fault sequence.
Hence just remove them.
Suggested-by: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Anshuman Khandual <khandual@xxxxxxxxxxxxxxxxxx>
---
mm/mempolicy.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 618ab12..3509b84 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -2172,17 +2172,12 @@ int mpol_misplaced(struct page *page, struct vm_area_struct *vma, unsigned long
int polnid = -1;
int ret = -1;
- BUG_ON(!vma);
-
pol = get_vma_policy(vma, addr);
if (!(pol->flags & MPOL_F_MOF))
goto out;
switch (pol->mode) {
case MPOL_INTERLEAVE:
- BUG_ON(addr >= vma->vm_end);
- BUG_ON(addr < vma->vm_start);
-
pgoff = vma->vm_pgoff;
pgoff += (addr - vma->vm_start) >> PAGE_SHIFT;
polnid = offset_il_node(pol, vma, pgoff);
--
1.8.5.2
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