linux-hardening - Re: [PATCH] sparc64: Replace all non-returning strlcpy with strscpy

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Message-Id: <168676716423.1877080.11129946294131048538.b4-ty@chromium.org>
Date:   Wed, 14 Jun 2023 11:26:06 -0700
From:   Kees Cook <keescook@...omium.org>
To:     davem@...emloft.net, azeemshaikh38@...il.com
Cc:     Kees Cook <keescook@...omium.org>, linux-kernel@...r.kernel.org,
        sparclinux@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH] sparc64: Replace all non-returning strlcpy with strscpy

On Tue, 30 May 2023 16:30:01 +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.
> 
> [...]

Build tested with GCC 12 with 32-bit and 64-bit defconfigs.

Applied to for-next/hardening, thanks!

[1/1] sparc64: Replace all non-returning strlcpy with strscpy
      https://git.kernel.org/kees/c/7136be35e71c

-- 
Kees Cook