linux-kernel - Re: [PATCH 1/3] kunit: add kunit.filter_glob cmdline option to filter suites

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Date:   Mon, 8 Feb 2021 14:12:23 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Daniel Latypov <dlatypov@...gle.com>
Cc:     kbuild@...ts.01.org, Brendan Higgins <brendanhiggins@...gle.com>,
        David Gow <davidgow@...gle.com>, lkp@...el.com,
        kbuild-all@...ts.01.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH 1/3] kunit: add kunit.filter_glob cmdline option to
 filter suites

On Thu, Feb 04, 2021 at 09:30:43AM -0800, Daniel Latypov wrote:
> On Wed, Feb 3, 2021 at 11:13 PM Dan Carpenter <dan.carpenter@...cle.com> wrote:
> >
> > Hi Daniel,
> >
> > url:    https://github.com/0day-ci/linux/commits/Daniel-Latypov/kunit-support-running-subsets-of-test-suites-from/20210204-074405 
> > base:   88bb507a74ea7d75fa49edd421eaa710a7d80598
> > config: x86_64-randconfig-m001-20210202 (attached as .config)
> > compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
> >
> > If you fix the issue, kindly add following tag as appropriate
> > Reported-by: kernel test robot <lkp@...el.com>
> > Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
> >
> > smatch warnings:
> > lib/kunit/executor.c:110 kunit_run_all_tests() error: double free of 'suite_set.start'
> >
> > vim +110 lib/kunit/executor.c
> >
> > 8c0d884986ba22 Brendan Higgins 2020-08-04   96  int kunit_run_all_tests(void)
> > aac35468ca20a3 Alan Maguire    2020-08-04   97  {
> > aac35468ca20a3 Alan Maguire    2020-08-04   98          struct kunit_suite * const * const *suites;
> > aac35468ca20a3 Alan Maguire    2020-08-04   99
> > d5554dd78a454b Daniel Latypov  2021-02-03  100          struct suite_set suite_set = kunit_filter_suites();
> > 45dcbb6f5ef78b Brendan Higgins 2020-08-04  101
> > d5554dd78a454b Daniel Latypov  2021-02-03  102          kunit_print_tap_header(&suite_set);
> > d5554dd78a454b Daniel Latypov  2021-02-03  103
> > d5554dd78a454b Daniel Latypov  2021-02-03  104          for (suites = suite_set.start; suites < suite_set.end; suites++)
> > aac35468ca20a3 Alan Maguire    2020-08-04  105                  __kunit_test_suites_init(*suites);
> > aac35468ca20a3 Alan Maguire    2020-08-04  106
> > d5554dd78a454b Daniel Latypov  2021-02-03  107          if (filter_glob) { /* a copy was made of each array */
> > d5554dd78a454b Daniel Latypov  2021-02-03  108                  for (suites = suite_set.start; suites < suite_set.end; suites++)
> >                                                                      ^^^^^^^^^^^^^^^^^^^^^^^^
> > This will free "suite_set.start" will in the first iteration through the
> > loop
> 
> Ah, the loop is supposed to contain `kfree(*suites)`.
> I'll fix the patch and resend.
> 
> I'm not familiar with conventions but it feels like adding Reported-by
> on the amended patch would almost imply the report suggested the need
> for the ability to filter suites.
> So I'll add an informal attribution in the cover letter.
> 
> Thanks!

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regards,
dan carpenter