X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=block%2Fbio.c;h=9c64edac75d5055896516efc9dc28c43d41f673d;hb=9fa72f250436aadfae7019afb10b8b2596fd73b3;hp=cea6758155878ddb681c6c0a63b92d9951dc7937;hpb=ea531d28a2979d52be83959a6e22cb67d516b3b9;p=mirror_ubuntu-bionic-kernel.git

diff --git a/block/bio.c b/block/bio.c
index cea675815587..9c64edac75d5 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -156,7 +156,7 @@ out:
 
 unsigned int bvec_nr_vecs(unsigned short idx)
 {
-	return bvec_slabs[idx].nr_vecs;
+	return bvec_slabs[--idx].nr_vecs;
 }
 
 void bvec_free(mempool_t *pool, struct bio_vec *bv, unsigned int idx)
@@ -1316,8 +1316,11 @@ struct bio *bio_copy_user_iov(struct request_queue *q,
 			}
 		}
 
-		if (bio_add_pc_page(q, bio, page, bytes, offset) < bytes)
+		if (bio_add_pc_page(q, bio, page, bytes, offset) < bytes) {
+			if (!map_data)
+				__free_page(page);
 			break;
+		}
 
 		len -= bytes;
 		offset = 0;
@@ -1338,7 +1341,8 @@ struct bio *bio_copy_user_iov(struct request_queue *q,
 		if (ret)
 			goto cleanup;
 	} else {
-		zero_fill_bio(bio);
+		if (bmd->is_our_pages)
+			zero_fill_bio(bio);
 		iov_iter_advance(iter, bio->bi_iter.bi_size);
 	}