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;