X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=block%2Fblk-map.c;h=2990447f45e913f7aa968ddc3979ea7b1a027a80;hb=0b271ef4521756010675b1611bef20fd3096790d;hp=4849fa36161eb697b47b08efa27af085b58bed3c;hpb=6b425660f45cdea177fe95388e081afa947b1506;p=mirror_ubuntu-bionic-kernel.git

diff --git a/block/blk-map.c b/block/blk-map.c
index 4849fa36161e..2990447f45e9 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -217,8 +217,14 @@ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq,
 		return PTR_ERR(bio);
 
 	if (bio->bi_size != len) {
+		/*
+		 * Grab an extra reference to this bio, as bio_unmap_user()
+		 * expects to be able to drop it twice as it happens on the
+		 * normal IO completion path
+		 */
+		bio_get(bio);
 		bio_endio(bio, 0);
-		bio_unmap_user(bio);
+		__blk_rq_unmap_user(bio);
 		return -EINVAL;
 	}