diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index aede1be4dc0c..49bf8e11c11c 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -348,6 +348,7 @@ static void jffs2_kill_sb(struct super_block *sb)
 		jffs2_stop_garbage_collect_thread(c);
 	kill_mtd_super(sb);
 	kfree(c);
+	memset(&c, 0, sizeof(struct jffs2_sb_info));
 }
 
 static struct file_system_type jffs2_fs_type = {