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mm, hugetlb: do not use a page in page cache for cow optimization
[platform/adaptation/renesas_rcar/renesas_kernel.git]
/
mm
/
huge_memory.c
diff --git
a/mm/huge_memory.c
b/mm/huge_memory.c
index
8b7fc20
..
963e14c
100644
(file)
--- a/
mm/huge_memory.c
+++ b/
mm/huge_memory.c
@@
-2296,6
+2296,8
@@
static void collapse_huge_page(struct mm_struct *mm,
goto out;
vma = find_vma(mm, address);
+ if (!vma)
+ goto out;
hstart = (vma->vm_start + ~HPAGE_PMD_MASK) & HPAGE_PMD_MASK;
hend = vma->vm_end & HPAGE_PMD_MASK;
if (address < hstart || address + HPAGE_PMD_SIZE > hend)