Re: [PATCH v4 4/4] selftest: Taint kernel when test module loaded

From: kernel test robot <lkp@intel.com>
To: David Gow <davidgow@google.com>,
	Brendan Higgins <brendanhiggins@google.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Jonathan Corbet <corbet@lwn.net>,
	Andrew Morton <akpm@linux-foundation.org>,
	Kees Cook <keescook@chromium.org>,
	Shuah Khan <skhan@linuxfoundation.org>, Greg KH <greg@kroah.com>,
	Luis Chamberlain <mcgrof@kernel.org>,
	Masahiro Yamada <masahiroy@kernel.org>
Cc: kbuild-all@lists.01.org,
	Linux Memory Management List <linux-mm@kvack.org>,
	David Gow <davidgow@google.com>,
	"Guilherme G . Piccoli" <gpiccoli@igalia.com>,
	Sebastian Reichel <sre@kernel.org>,
	John Ogness <john.ogness@linutronix.de>,
	Joe Fradley <joefradley@google.com>,
	Daniel Latypov <dlatypov@google.com>,
	kunit-dev@googlegroups.com, linux-kselftest@vger.kernel.org,
	linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
	Jani Nikula <jani.nikula@linux.intel.com>,
	Lucas De Marchi <lucas.demarchi@intel.com>,
	Aaron Tomlin <atomlin@redhat.com>,
	linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org,
	Michal Marek <michal.lkml@markovi.net>,
	Nick Desaulniers <ndesaulniers@google.com>,
	linux-kbuild@vger.kernel.org
Subject: Re: [PATCH v4 4/4] selftest: Taint kernel when test module loaded
Date: Sat, 2 Jul 2022 01:37:08 +0800	[thread overview]
Message-ID: <202207020132.SKDpQP9D-lkp@intel.com> (raw)
In-Reply-To: <20220701084744.3002019-4-davidgow@google.com>

Hi David,

I love your patch! Yet something to improve:

[auto build test ERROR on masahiroy-kbuild/for-next]
[also build test ERROR on shuah-kselftest/next linus/master v5.19-rc4 next-20220701]
[cannot apply to mcgrof/modules-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/intel-lab-lkp/linux/commits/David-Gow/panic-Taint-kernel-if-tests-are-run/20220701-164843
base:   https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git for-next
config: alpha-randconfig-r006-20220629 (https://download.01.org/0day-ci/archive/20220702/202207020132.SKDpQP9D-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 11.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/42b6461d6cca4baeeeed474b1400e203057c2b9b
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review David-Gow/panic-Taint-kernel-if-tests-are-run/20220701-164843
        git checkout 42b6461d6cca4baeeeed474b1400e203057c2b9b
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=alpha SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   In file included from lib/test_printf.c:27:
   lib/test_printf.c: In function 'test_printf_init':
>> lib/../tools/testing/selftests/kselftest_module.h:45:19: error: 'TAINT_KUNIT' undeclared (first use in this function)
      45 |         add_taint(TAINT_KUNIT, LOCKDEP_STILL_OK);       \
         |                   ^~~~~~~~~~~
   lib/test_printf.c:801:1: note: in expansion of macro 'KSTM_MODULE_LOADERS'
     801 | KSTM_MODULE_LOADERS(test_printf);
         | ^~~~~~~~~~~~~~~~~~~
   lib/../tools/testing/selftests/kselftest_module.h:45:19: note: each undeclared identifier is reported only once for each function it appears in
      45 |         add_taint(TAINT_KUNIT, LOCKDEP_STILL_OK);       \
         |                   ^~~~~~~~~~~
   lib/test_printf.c:801:1: note: in expansion of macro 'KSTM_MODULE_LOADERS'
     801 | KSTM_MODULE_LOADERS(test_printf);
         | ^~~~~~~~~~~~~~~~~~~

vim +/TAINT_KUNIT +45 lib/../tools/testing/selftests/kselftest_module.h

    40	
    41	#define KSTM_MODULE_LOADERS(__module)			\
    42	static int __init __module##_init(void)			\
    43	{							\
    44		pr_info("loaded.\n");				\
  > 45		add_taint(TAINT_KUNIT, LOCKDEP_STILL_OK);	\
    46		selftest();					\
    47		return kstm_report(total_tests, failed_tests, skipped_tests);	\
    48	}							\
    49	static void __exit __module##_exit(void)		\
    50	{							\
    51		pr_info("unloaded.\n");				\
    52	}							\
    53	module_init(__module##_init);				\
    54	module_exit(__module##_exit)
    55	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp