diff --git a/tools/testing/selftests/bpf/prog_tests/core_reloc.c b/tools/testing/selftests/bpf/prog_tests/core_reloc.c
index 1041d0c593f618729e93cce9fd5abc1730b3e35e..44a9868c70ea08a69877890ea033d48c98bb69b1 100644
--- a/tools/testing/selftests/bpf/prog_tests/core_reloc.c
+++ b/tools/testing/selftests/bpf/prog_tests/core_reloc.c
@@ -881,7 +881,8 @@ void test_core_reloc(void)
 		data = mmap_data;
 
 		memset(mmap_data, 0, sizeof(*data));
-		memcpy(data->in, test_case->input, test_case->input_len);
+		if (test_case->input_len)
+			memcpy(data->in, test_case->input, test_case->input_len);
 		data->my_pid_tgid = my_pid_tgid;
 
 		link = bpf_program__attach_raw_tracepoint(prog, tp_name);