netdev - Re: [PATCH] net: Replace strlcpy 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] [thread-next>] [day] [month] [year] [list]

Message-ID: <ZKQrGaJzNlLse+js@corigine.com>
Date: Tue, 4 Jul 2023 15:22:17 +0100
From: Simon Horman <simon.horman@...igine.com>
To: Azeem Shaikh <azeemshaikh38@...il.com>
Cc: "David S. Miller" <davem@...emloft.net>,
	linux-hardening@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
	linux-kernel@...r.kernel.org, David Ahern <dsahern@...nel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Kees Cook <keescook@...omium.org>, netdev@...r.kernel.org
Subject: Re: [PATCH] net: Replace strlcpy with strscpy

On Mon, Jul 03, 2023 at 05:58:40PM +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: Simon Horman <simon.horman@...igine.com>