diff --git a/drivers/gpu/drm/drm_stub.c b/drivers/gpu/drm/drm_stub.c
index 63575e2fa882493461bf2b0aba217e4be15bcc01..d1ad57450df1543af9cc502a281b23661075b331 100644
--- a/drivers/gpu/drm/drm_stub.c
+++ b/drivers/gpu/drm/drm_stub.c
@@ -156,6 +156,9 @@ static void drm_master_destroy(struct kref *kref)
 		master->unique_len = 0;
 	}
 
+	kfree(dev->devname);
+	dev->devname = NULL;
+
 	list_for_each_entry_safe(pt, next, &master->magicfree, head) {
 		list_del(&pt->head);
 		drm_ht_remove_item(&master->magiclist, &pt->hash_item);