From: Kees Cook <keescook@chromium.org>
To: Azeem Shaikh <azeemshaikh38@gmail.com>
Cc: linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org,
linux-fsdevel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Lorenzo Stoakes <lstoakes@gmail.com>, Baoquan He <bhe@redhat.com>,
David Hildenbrand <david@redhat.com>,
Liu Shixin <liushixin2@huawei.com>,
Kefeng Wang <wangkefeng.wang@huawei.com>
Subject: Re: [PATCH] procfs: Replace all non-returning strlcpy with strscpy
Date: Thu, 11 May 2023 09:25:48 -0700 [thread overview]
Message-ID: <202305110925.22DF454F7F@keescook> (raw)
In-Reply-To: <20230510212457.3491385-1-azeemshaikh38@gmail.com>
On Wed, May 10, 2023 at 09:24:57PM +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
prev parent reply other threads:[~2023-05-11 16:25 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-10 21:24 [PATCH] procfs: Replace all non-returning strlcpy with strscpy Azeem Shaikh
2023-05-11 16:25 ` Kees Cook [this message]
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