linux-kernel - [PATCH v5 08/10] seccomp: Enhance test_harness with an assert step mechanism

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Date:   Wed, 22 Feb 2017 02:26:30 +0100
From:   Mickaël Salaün <mic@...ikod.net>
To:     linux-kernel@...r.kernel.org
Cc:     Mickaël Salaün <mic@...ikod.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Andy Lutomirski <luto@...capital.net>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Casey Schaufler <casey@...aufler-ca.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        David Drysdale <drysdale@...gle.com>,
        "David S . Miller" <davem@...emloft.net>,
        "Eric W . Biederman" <ebiederm@...ssion.com>,
        James Morris <james.l.morris@...cle.com>,
        Jann Horn <jann@...jh.net>, Jonathan Corbet <corbet@....net>,
        Matthew Garrett <mjg59@...f.ucam.org>,
        Michael Kerrisk <mtk.manpages@...il.com>,
        Kees Cook <keescook@...omium.org>,
        Paul Moore <paul@...l-moore.com>,
        Sargun Dhillon <sargun@...gun.me>,
        "Serge E . Hallyn" <serge@...lyn.com>,
        Shuah Khan <shuah@...nel.org>, Tejun Heo <tj@...nel.org>,
        Thomas Graf <tgraf@...g.ch>, Will Drewry <wad@...omium.org>,
        kernel-hardening@...ts.openwall.com, linux-api@...r.kernel.org,
        linux-security-module@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH v5 08/10] seccomp: Enhance test_harness with an assert step mechanism

This is useful to return an information about the error without being
able to write to TH_LOG_STREAM.

Helpers from test_harness.h may be useful outside of the seccomp
directory.

Signed-off-by: Mickaël Salaün <mic@...ikod.net>
Cc: Andy Lutomirski <luto@...capital.net>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Kees Cook <keescook@...omium.org>
Cc: Shuah Khan <shuah@...nel.org>
Cc: Will Drewry <wad@...omium.org>
---
 tools/testing/selftests/seccomp/test_harness.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/seccomp/test_harness.h b/tools/testing/selftests/seccomp/test_harness.h
index a786c69c7584..77e407663e06 100644
--- a/tools/testing/selftests/seccomp/test_harness.h
+++ b/tools/testing/selftests/seccomp/test_harness.h
@@ -397,7 +397,7 @@ struct __test_metadata {
 	const char *name;
 	void (*fn)(struct __test_metadata *);
 	int termsig;
-	int passed;
+	__s8 passed;
 	int trigger; /* extra handler after the evaluation */
 	struct __test_metadata *prev, *next;
 };
@@ -476,6 +476,12 @@ void __run_test(struct __test_metadata *t)
 					"instead of by signal (code: %d)\n",
 					t->name,
 					WEXITSTATUS(status));
+			} else if (t->passed < 0) {
+				fprintf(TH_LOG_STREAM,
+					"%s: Failed at step #%d\n",
+					t->name,
+					t->passed * -1);
+				t->passed = 0;
 			}
 		} else if (WIFSIGNALED(status)) {
 			t->passed = 0;
-- 
2.11.0