diff -ruN pmdk/src/examples/libpmem2/unsafe_shutdown/unsafe_shutdown.c pmdk-1.12.1/src/examples/libpmem2/unsafe_shutdown/unsafe_shutdown.c
--- pmdk/src/examples/libpmem2/unsafe_shutdown/unsafe_shutdown.c	2022-11-17 17:53:30.000000000 +0800
+++ pmdk-1.12.1/src/examples/libpmem2/unsafe_shutdown/unsafe_shutdown.c	2022-12-04 21:30:57.093856024 +0800
@@ -636,8 +636,8 @@
 		return 1;
 	}
 
-	struct user_data *data;
-	size_t size;
+	struct user_data *data = NULL;
+	size_t size = 0;
 	enum pool_state state = pool_access_data(pool, (void **)&data, &size);
 
 	int ret = 1;
diff -ruN pmdk/src/examples/librpmem/hello.c pmdk-1.12.1/src/examples/librpmem/hello.c
--- pmdk/src/examples/librpmem/hello.c	2022-11-17 17:53:30.000000000 +0800
+++ pmdk-1.12.1/src/examples/librpmem/hello.c	2022-12-04 21:30:57.093856024 +0800
@@ -41,6 +41,7 @@
 {
 	hello->lang = lang;
 	strncpy(hello->str, hello_str[hello->lang], STR_SIZE);
+	hello->str[STR_SIZE-1] = '\0';
 }
 
 static void