bpf_kfunc_call_test_mem_len_fail2
bpf_kfunc_call_test_mem_len_fail2(&b, -1);
BTF_ID_FLAGS(func, bpf_kfunc_call_test_mem_len_fail2)
void bpf_kfunc_call_test_mem_len_fail2(__u64 *mem, int len) __ksym;