udmabuf: use EBADFD in case we didn't got a memfd

Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20180911134216.9760-10-kraxel@redhat.com

drivers/dma-buf/udmabuf.c

@@ -154,14 +154,17 @@ static long udmabuf_create(const struct udmabuf_create_list *head,
 
 	pgbuf = 0;
 	for (i = 0; i < head->count; i++) {
+		ret = -EBADFD;
 		memfd = fget(list[i].memfd);
 		if (!memfd)
 			goto err;
 		if (!shmem_mapping(file_inode(memfd)->i_mapping))
 			goto err;
 		seals = memfd_fcntl(memfd, F_GET_SEALS, 0);
-		if (seals == -EINVAL ||
-		    (seals & SEALS_WANTED) != SEALS_WANTED ||
+		if (seals == -EINVAL)
+			goto err;
+		ret = -EINVAL;
+		if ((seals & SEALS_WANTED) != SEALS_WANTED ||
 		    (seals & SEALS_DENIED) != 0)
 			goto err;
 		pgoff = list[i].offset >> PAGE_SHIFT;