linux-hardening - Re: [PATCH] nios2: Replace all non-returning strlcpy with strscpy

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Date:   Tue, 13 Jun 2023 17:15:41 -0500
From:   Dinh Nguyen <dinguyen@...nel.org>
To:     Kees Cook <keescook@...omium.org>,
        Azeem Shaikh <azeemshaikh38@...il.com>
Cc:     linux-hardening@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] nios2: Replace all non-returning strlcpy with strscpy



On 5/30/23 18:20, Kees Cook wrote:
> On Tue, May 30, 2023 at 04:23:58PM +0000, Azeem Shaikh wrote:
>> strlcpy() reads the entire source buffer first.
>> This read may exceed the destination size limit.
>> This is both inefficient and can lead to linear read
>> overflows if a source string is not NUL-terminated [1].
>> In an effort to remove strlcpy() completely [2], replace
>> strlcpy() here with strscpy().
>> No return values were used, so direct replacement is safe.
>>
>> [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy
>> [2] https://github.com/KSPP/linux/issues/89
>>
>> Signed-off-by: Azeem Shaikh <azeemshaikh38@...il.com>
> 
> Reviewed-by: Kees Cook <keescook@...omium.org>
> 

Applied!

Thanks,
Dinh