linux-kernel - [PATCH RFT v6 7/9] selftests/clone3: Explicitly handle child exits due to signals

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Message-Id: <20240623-clone3-shadow-stack-v6-7-9ee7783b1fb9@kernel.org>
Date: Sun, 23 Jun 2024 12:23:49 +0100
From: Mark Brown <broonie@...nel.org>
To: "Rick P. Edgecombe" <rick.p.edgecombe@...el.com>, 
 Deepak Gupta <debug@...osinc.com>, Szabolcs Nagy <Szabolcs.Nagy@....com>, 
 "H.J. Lu" <hjl.tools@...il.com>, Florian Weimer <fweimer@...hat.com>, 
 Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, 
 Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>, 
 x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>, 
 Peter Zijlstra <peterz@...radead.org>, Juri Lelli <juri.lelli@...hat.com>, 
 Vincent Guittot <vincent.guittot@...aro.org>, 
 Dietmar Eggemann <dietmar.eggemann@....com>, 
 Steven Rostedt <rostedt@...dmis.org>, Ben Segall <bsegall@...gle.com>, 
 Mel Gorman <mgorman@...e.de>, 
 Daniel Bristot de Oliveira <bristot@...hat.com>, 
 Valentin Schneider <vschneid@...hat.com>, 
 Christian Brauner <brauner@...nel.org>, Shuah Khan <shuah@...nel.org>
Cc: linux-kernel@...r.kernel.org, Catalin Marinas <catalin.marinas@....com>, 
 Will Deacon <will@...nel.org>, jannh@...gle.com, bsegall@...gle.com, 
 linux-kselftest@...r.kernel.org, linux-api@...r.kernel.org, 
 Mark Brown <broonie@...nel.org>, Kees Cook <kees@...nel.org>
Subject: [PATCH RFT v6 7/9] selftests/clone3: Explicitly handle child exits
 due to signals

In order to improve diagnostics and allow tests to explicitly look for
signals check to see if the child exited due to a signal and if it did
print the code and return it as a positive value, distinct from the
negative errnos currently returned.

Signed-off-by: Mark Brown <broonie@...nel.org>
---
 tools/testing/selftests/clone3/clone3.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
index e066b201fa64..3b3a08e6a34d 100644
--- a/tools/testing/selftests/clone3/clone3.c
+++ b/tools/testing/selftests/clone3/clone3.c
@@ -111,6 +111,13 @@ static int call_clone3(uint64_t flags, size_t size, enum test_mode test_mode)
 		ksft_print_msg("waitpid() returned %s\n", strerror(errno));
 		return -errno;
 	}
+
+	if (WIFSIGNALED(status)) {
+		ksft_print_msg("Child exited with signal %d\n",
+			       WTERMSIG(status));
+		return WTERMSIG(status);
+	}
+
 	if (!WIFEXITED(status)) {
 		ksft_print_msg("Child did not exit normally, status 0x%x\n",
 			       status);

-- 
2.39.2