diff --git a/block/blk-map.c b/block/blk-map.c
index 8584babf3ea0..6c6f0ef1407b 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -344,7 +344,8 @@ static int bio_map_user_iov(struct request *rq, struct iov_iter *iter,
 	return 0;
 
  out_unmap:
-	bio_release_pages(bio, false);
+	if (bio->bi_vcnt)
+		bio_release_pages(bio, false);
 	blk_mq_map_bio_put(bio);
 	return ret;
 }