diff --git a/block/blk-map.c b/block/blk-map.c
index b5fd1d8574615e..8e0b67875a0c85 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -460,6 +460,17 @@ static void bio_copy_kern_endio_read(struct bio *bio)
 	bio_copy_kern_endio(bio);
 }
 
+static bool blk_kern_needs_copy(void *kbuf, unsigned int len)
+{
+#ifdef CONFIG_LKL
+	char *buf = kbuf;
+
+	return !virt_addr_valid(buf) || !virt_addr_valid(buf + len - 1);
+#else
+	return false;
+#endif
+}
+
 /**
  *	bio_copy_kern	-	copy kernel address into bio
  *	@q: the struct request_queue for the bio
@@ -772,7 +783,7 @@ int blk_rq_map_kern(struct request_queue *q, struct request *rq, void *kbuf,
 		return -EINVAL;
 
 	if (!blk_rq_aligned(q, addr, len) || object_is_on_stack(kbuf) ||
-	    blk_queue_may_bounce(q))
+	    blk_kern_needs_copy(kbuf, len) || blk_queue_may_bounce(q))
 		bio = bio_copy_kern(q, kbuf, len, gfp_mask, reading);
 	else
 		bio = bio_map_kern(q, kbuf, len, gfp_mask);