linux-hardening - Re: [PATCH] selftests: rtc: rtctest: Do not open-code TEST_HARNESS

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Message-ID: <202405181335.00B6D2F@keescook>
Date: Sat, 18 May 2024 13:36:41 -0700
From: Kees Cook <keescook@...omium.org>
To: Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc: Shuah Khan <shuah@...nel.org>, Masahiro Yamada <masahiroy@...nel.org>,
	linux-rtc@...r.kernel.org, linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH] selftests: rtc: rtctest: Do not open-code
 TEST_HARNESS_MAIN

On Sat, May 18, 2024 at 10:23:54PM +0200, Alexandre Belloni wrote:
> On 17/05/2024 17:16:58-0700, Kees Cook wrote:
> > Argument processing is specific to the test harness code. Any optional
> > information needs to be passed via environment variables. Move alternate
> > path to the RTC_DEV environment variable. Also do not open-code
> > TEST_HARNESS_MAIN because its definition may change.
> 
> Th main issue doing that is that this breaks the main use case of
> rtctest as /dev/rtc1 is usually the main target for those tests. Having
> the RTC_DEV environment variable only documented n this commit message
> is definitively not enough, I'm going to have to handle zillion of
> complaints that this is not working anymore.

Hm, maybe switch the default to /dev/rtc1? Maybe there's a better way to
integrate arguments into a test runner. Right now the core harness code
is doing the argument parsing...

-- 
Kees Cook