linux-kernel - Re: [PATCH] kunit: Fix NULL-dereference in kunit_init

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Message-ID: <CABVgOS=YgpaYg=4Lks8naBqBZVEPhfXC7S1S1=KRe1WAuJLJrw@mail.gmail.com>
Date: Fri, 22 Dec 2023 16:38:10 +0800
From: David Gow <davidgow@...gle.com>
To: Richard Fitzgerald <rf@...nsource.cirrus.com>
Cc: brendan.higgins@...ux.dev, rmoar@...gle.com, 
	linux-kselftest@...r.kernel.org, kunit-dev@...glegroups.com, 
	linux-kernel@...r.kernel.org, patches@...nsource.cirrus.com
Subject: Re: [PATCH] kunit: Fix NULL-dereference in kunit_init_suite() if
 suite->log is NULL

On Mon, 18 Dec 2023 at 23:17, Richard Fitzgerald
<rf@...nsource.cirrus.com> wrote:
>
> suite->log must be checked for NULL before passing it to
> string_stream_clear(). This was done in kunit_init_test() but was missing
> from kunit_init_suite().
>
> Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
> Fixes: 6d696c4695c5 ("kunit: add ability to run tests after boot using debugfs")
> ---

Acked-by: David Gow <davidgow@...gle.com>

Cheers,
-- David


>  lib/kunit/test.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/lib/kunit/test.c b/lib/kunit/test.c
> index e803d998e855..ea7f0913e55a 100644
> --- a/lib/kunit/test.c
> +++ b/lib/kunit/test.c
> @@ -658,7 +658,9 @@ static void kunit_init_suite(struct kunit_suite *suite)
>         kunit_debugfs_create_suite(suite);
>         suite->status_comment[0] = '\0';
>         suite->suite_init_err = 0;
> -       string_stream_clear(suite->log);
> +
> +       if (suite->log)
> +               string_stream_clear(suite->log);
>  }
>
>  bool kunit_enabled(void)
> --
> 2.30.2
>

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