From: Kees Cook <keescook@chromium.org>
To: Azeem Shaikh <azeemshaikh38@gmail.com>
Cc: Russell King <linux@armlinux.org.uk>,
linux-hardening@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
"Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>,
Linus Walleij <linus.walleij@linaro.org>,
Amit Daniel Kachhap <amit.kachhap@arm.com>,
Ard Biesheuvel <ardb@kernel.org>
Subject: Re: [PATCH] ARM: Replace all non-returning strlcpy with strscpy
Date: Tue, 30 May 2023 16:17:22 -0700 [thread overview]
Message-ID: <202305301617.FD31A8E9B1@keescook> (raw)
In-Reply-To: <20230530155501.222213-1-azeemshaikh38@gmail.com>
On Tue, May 30, 2023 at 03:55:01PM +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>
--
Kees Cook
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next prev parent reply other threads:[~2023-05-30 23:17 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-30 15:55 [PATCH] ARM: Replace all non-returning strlcpy with strscpy Azeem Shaikh
2023-05-30 23:17 ` Kees Cook [this message]
2023-05-31 13:29 ` Linus Walleij
2023-06-01 8:35 ` Ard Biesheuvel
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