linux-hardening - 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