linux-kernel - Re: [PATCH] selftests:breakpoints: Fix Format String Warning in breakpoint

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Date:   Thu, 30 Nov 2023 14:36:10 -0700
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     angquan yu <angquan21@...il.com>
Cc:     shuah@...nel.org, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH] selftests:breakpoints: Fix Format String Warning in
 breakpoint_test

On 11/28/23 20:57, angquan yu wrote:
> From: angquan yu <angquan21@...il.com>
> 
> This commit resolves a compiler warning regardingthe
> use of non-literal format strings in breakpoint_test.c.
> 
> The functions `ksft_test_result_pass` and `ksft_test_result_fail`
> were previously called with a variable `msg` directly, which could
> potentially lead to format string vulnerabilities.
> 
> Changes made:
> - Modified the calls to `ksft_test_result_pass` and `ksft_test_result_fail`
> by adding a "%s" format specifier. This explicitly declares `msg` as a
> string argument, adhering to safer coding practices and resolving
> the compiler warning.
> 
> This change does not affect the functional behavior of the code but ensures
> better code safety and compliance with recommended C programming standards.
> 
> The previous warning is "breakpoint_test.c:287:17:
> warning: format not a string literal and no format arguments
> [-Wformat-security]
>    287 |                 ksft_test_result_pass(msg);
>        |                 ^~~~~~~~~~~~~~~~~~~~~
> breakpoint_test.c:289:17: warning: format not a string literal
> and no format arguments [-Wformat-security]
>    289 |                 ksft_test_result_fail(msg);
>        |    "
> 
> Signed-off-by: angquan yu <angquan21@...il.com>

Thank you foe the fix. Applied to linux-kselftest next Linux 6.8-rc1

thanks,
-- Shuah