diff --git a/mm/memory.c b/mm/memory.c
index 821fcea71a04..ce2ff976fc8d 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -5284,6 +5284,10 @@ retry:
 	if (!vma_is_anonymous(vma))
 		goto inval;
 
+	/* find_mergeable_anon_vma uses adjacent vmas which are not locked */
+	if (!vma->anon_vma)
+		goto inval;
+
 	if (!vma_start_read(vma))
 		goto inval;