Merge drm-misc/drm-misc-next-fixes into drm-misc-fixes

There's a patch left in drm-misc-next-fixes, let's bring it into
drm-misc-fixes.
Signed-off-by: Maxime Ripard <mripard@kernel.org>

tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c

@@ -29,9 +29,11 @@ static int check_vgem(int fd)
 	version.name = name;
 
 	ret = ioctl(fd, DRM_IOCTL_VERSION, &version);
-	if (ret)
+	if (ret || version.name_len != 4)
 		return 0;
 
+	name[4] = '\0';
+
 	return !strcmp(name, "vgem");
 }