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

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Message-ID: <36eac3a4-bca9-4648-9154-7a0561476f9f@collabora.com>
Date: Sat, 30 Dec 2023 12:20:03 +0500
From: Muhammad Usama Anjum <usama.anjum@...labora.com>
To: Richard Fitzgerald <rf@...nsource.cirrus.com>, brendan.higgins@...ux.dev,
 davidgow@...gle.com, rmoar@...gle.com
Cc: Muhammad Usama Anjum <usama.anjum@...labora.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 12/18/23 8:17 PM, Richard Fitzgerald 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")
Reviewed-by: Muhammad Usama Anjum <usama.anjum@...labora.com>

> ---
>  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)

-- 
BR,
Muhammad Usama Anjum