[PATCH] fix

[Lorenzo Stoakes]

Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx>
---
 mm/madvise.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/madvise.c b/mm/madvise.c
index 267d8e4adf31..45ea4588e34e 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -1549,6 +1549,7 @@ int madvise_walk_vmas(struct mm_struct *mm, unsigned long start,
 	if (madv_behavior && madv_behavior->lock_mode == MADVISE_VMA_READ_LOCK) {
 		vma = try_vma_read_lock(mm, madv_behavior, start, end);
 		if (vma) {
+			*prev = vma;
 			error = visit(vma, &prev, start, end, arg);
 			vma_end_read(vma);
 			return error;
--
2.49.0