diff -uparN gpdb-6.16.2/src/backend/utils/resgroup/test/resgroup_test.c gpdb-6.16.2_patched/src/backend/utils/resgroup/test/resgroup_test.c
--- gpdb-6.16.2/src/backend/utils/resgroup/test/resgroup_test.c	2021-06-03 15:24:57.000000000 +0800
+++ gpdb-6.16.2_patched/src/backend/utils/resgroup/test/resgroup_test.c	2021-07-14 09:37:25.907086232 +0800
@@ -73,6 +73,7 @@ static void
 test__CpusetToBitset_bad_arguments(void **state)
 {
 	char cpuset[200];
+        memset(cpuset, 0, sizeof(cpuset));
 	assert_true(!CpusetToBitset(NULL, -1));
 	assert_true(!CpusetToBitset(cpuset, -1));
 	assert_true(!CpusetToBitset(cpuset, 200));