X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=block%2Fblk-map.c;h=69953bd97e6597f684803b5064662a13abb8c65b;hb=8d15b6afd86a699e240d181bc48b3a1f6c9025c6;hp=f565e11f465aa145120973bce58ef7ecc192f349;hpb=3e7018def475847418596c76997e0708bacda2c0;p=firefly-linux-kernel-4.4.55.git

diff --git a/block/blk-map.c b/block/blk-map.c
index f565e11f465a..69953bd97e65 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -90,6 +90,9 @@ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq,
 	if (!iter || !iter->count)
 		return -EINVAL;
 
+	if (!iter_is_iovec(iter))
+		return -EINVAL;
+
 	iov_for_each(iov, i, *iter) {
 		unsigned long uaddr = (unsigned long) iov.iov_base;