From c99068d6839cca6297826cdf3a72eba6a60b6a3f Mon Sep 17 00:00:00 2001 From: Li Zhijian Date: Fri, 17 Dec 2021 17:29:55 +0800 Subject: [PATCH] kselftest: signal all child processes [ Upstream commit 92d25637a3a45904292c93f1863c6bbda4e3e38f ] We have some many cases that will create child process as well, such as pidfd_wait. Previously, we will signal/kill the parent process when it is time out, but this signal will not be sent to its child process. In such case, if child process doesn't terminate itself, ksefltest framework will hang forever. Here we group all its child processes so that kill() can signal all of them in timeout. Fixed change log: Shuah Khan Suggested-by: yang xu Signed-off-by: Li Zhijian Acked-by: Christian Brauner Signed-off-by: Shuah Khan Signed-off-by: Sasha Levin --- tools/testing/selftests/kselftest_harness.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h index 79a182cfa43ad..78e59620d28de 100644 --- a/tools/testing/selftests/kselftest_harness.h +++ b/tools/testing/selftests/kselftest_harness.h @@ -875,7 +875,8 @@ static void __timeout_handler(int sig, siginfo_t *info, void *ucontext) } t->timed_out = true; - kill(t->pid, SIGKILL); + // signal process group + kill(-(t->pid), SIGKILL); } void __wait_for_test(struct __test_metadata *t) @@ -985,6 +986,7 @@ void __run_test(struct __fixture_metadata *f, ksft_print_msg("ERROR SPAWNING TEST CHILD\n"); t->passed = 0; } else if (t->pid == 0) { + setpgrp(); t->fn(t, variant); if (t->skip) _exit(255); -- 2.30.2