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From: Kees Cook <keescook@chromium.org>
To: Dinh Nguyen <dinguyen@kernel.org>
Cc: Azeem Shaikh <azeemshaikh38@gmail.com>,
	linux-hardening@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] nios2: Replace all non-returning strlcpy with strscpy
Date: Tue, 20 Jun 2023 13:15:15 -0700	[thread overview]
Message-ID: <202306201313.C425BCB@keescook> (raw)
In-Reply-To: <45ed31e0-9ecd-56ea-c0d4-3c68a3fd8cf5@kernel.org>

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@gmail.com>
> > 
> > Reviewed-by: Kees Cook <keescook@chromium.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!

-Kees

-- 
Kees Cook

  reply	other threads:[~2023-06-20 20:16 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-30 16:23 [PATCH] nios2: Replace all non-returning strlcpy with strscpy Azeem Shaikh
2023-05-30 23:20 ` Kees Cook
2023-06-13 22:15   ` Dinh Nguyen
2023-06-20 20:15     ` Kees Cook [this message]
2023-06-20 22:27       ` Dinh Nguyen
2023-06-21  0:14         ` Kees Cook

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