On Mon, Apr 26, 2021 at 11:06:08AM -0700, Sargun Dhillon wrote:
> +TEST(user_notification_signal_wait_killable)
> +{
> + pid_t pid;
> + long ret;
> + int status, listener, sk_pair[2];
> + struct seccomp_notif req = {
> + .flags = SECCOMP_USER_NOTIF_FLAG_WAIT_KILLABLE,
> + };
> + struct seccomp_notif_resp resp = {};
> + char c;
> +
> + ret = prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0);
> + ASSERT_EQ(0, ret) {
> + TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
> + }
> +
> + ASSERT_EQ(socketpair(PF_LOCAL, SOCK_SEQPACKET, 0, sk_pair), 0);
> + ASSERT_EQ(fcntl(sk_pair[0], F_SETFL, O_NONBLOCK), 0);
> +
> + listener = user_notif_syscall(__NR_gettid,
> + SECCOMP_FILTER_FLAG_NEW_LISTENER);
> + ASSERT_GE(listener, 0);
> +
> + pid = fork();
> + ASSERT_GE(pid, 0);
> +
> + if (pid == 0) {
> + close(sk_pair[0]);
> + handled = sk_pair[1];
> + if (signal(SIGUSR1, signal_handler) == SIG_ERR) {
I think here you want a write(handled, "x", 1), right?
Tycho
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