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

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Message-ID: <40af3815-b0ee-e96f-f7a8-9f0fe9f938d0@kernel.org>
Date:   Tue, 20 Jun 2023 17:27:29 -0500
From:   Dinh Nguyen <dinguyen@...nel.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Azeem Shaikh <azeemshaikh38@...il.com>,
        linux-hardening@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] nios2: Replace all non-returning strlcpy with strscpy



On 6/20/23 15:15, Kees Cook wrote:
> On Tue, Jun 13, 2023 at 05:15:41PM -0500, Dinh Nguyen wrote:
>>
>>
>> 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 for taking this patch! I just wanted to double-check, though; I
> haven't seen it show up in -next yet. Is this still queued?
> 
> Thanks!

I've queued it for v6.5. Do you need it in v6.4?

Dinh