linux-kernel - Re: [PATCH v2] staging: qlge: Replace strncpy with strscpy

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Message-ID: <ZSRMKoL1ljRM01Hq@babbage>
Date:   Mon, 9 Oct 2023 19:53:30 +0100
From:   Ricardo Lopes <ricardoapl.dev@...il.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     manishc@...vell.com, GR-Linux-NIC-Dev@...vell.com,
        coiby.xu@...il.com, justinstitt@...gle.com,
        linux-hardening@...r.kernel.org, gregkh@...uxfoundation.org,
        netdev@...r.kernel.org, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] staging: qlge: Replace strncpy with strscpy

On Mon, Oct 09, 2023 at 09:44:37AM -0700, Kees Cook wrote:
> Thanks for working on this! Doing these replacements needs analysis of
> several issues that should be described in the commit log:
> 
> - is the destination an %NUL-terminated string? (strncpy can produce
>   non-%NUL-terminated strings and sometimes this is intentional.)
> 
> - is the source %NUL-terminated? (Sometimes strncpy is used when memcpy,
>   kmemdup_nul, or other things should be used.)
> 
> - does the destination need to be %NUL padded? (strncpy does this
>   padding, but it isn't always obvious if it's needed.) When padding is
>   needed, strscpy_pad() should be used.

Thank you for the feedback Kees, I really appreciate it

Regards,

Ricardo Lopes