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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

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