[PATCH] mm: as the same logic with queue_pages_range

[Edward AD <eadavis@xxxxxxxx>]

Only dealwith queue_pages_range locked vmas.

Signed-off-by: Edward AD <eadavis@xxxxxxxx>
---
 mm/mempolicy.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 42b5567e3773..13050b968479 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1342,6 +1342,8 @@ static long do_mbind(unsigned long start, unsigned long len,
 	vma_iter_init(&vmi, mm, start);
 	prev = vma_prev(&vmi);
 	for_each_vma_range(vmi, vma, end) {
+		if (!vma || start < vma->vm_start)
+			continue;
 		err = mbind_range(&vmi, vma, &prev, start, end, new);
 		if (err)
 			break;
-- 
2.25.1