linux-kernel - Re: [PATCH v2 2/2] selftests/lkdtm: Add UBSAN config

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Message-ID: <202201211317.2E858328@keescook>
Date:   Fri, 21 Jan 2022 13:17:33 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Muhammad Usama Anjum <usama.anjum@...labora.com>
Cc:     Shuah Khan <shuah@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        kernel@...labora.com, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] selftests/lkdtm: Add UBSAN config

On Fri, Jan 21, 2022 at 07:51:53PM +0500, Muhammad Usama Anjum wrote:
> UBSAN_BOUNDS and UBSAN_TRAP depend on UBSAN config option.
> merge_config.sh script generates following warnings if parent config
> doesn't have UBSAN config already enabled and UBSAN_BOUNDS/UBSAN_TRAP
> config options don't get added to the parent config.
> 
> Value requested for CONFIG_UBSAN_BOUNDS not in final .config
> Requested value:  CONFIG_UBSAN_BOUNDS=y
> Actual value:
> 
> Value requested for CONFIG_UBSAN_TRAP not in final .config
> Requested value:  CONFIG_UBSAN_TRAP=y
> Actual value:
> 
> Fix this by including UBSAN config.
> 
> Fixes: c75be56e35b2 ("lkdtm/bugs: Add ARRAY_BOUNDS to selftests")
> Signed-off-by: Muhammad Usama Anjum <usama.anjum@...labora.com>

Acked-by: Kees Cook <keescook@...omium.org>

-- 
Kees Cook