From: Kees Cook <keescook@chromium.org>
To: Azeem Shaikh <azeemshaikh38@gmail.com>
Cc: "Sumit Semwal" <sumit.semwal@linaro.org>,
linux-hardening@vger.kernel.org,
"Gustavo Padovan" <gustavo@padovan.org>,
linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org,
linux-kernel@vger.kernel.org,
"Christian König" <christian.koenig@amd.com>,
linaro-mm-sig@lists.linaro.org
Subject: Re: [PATCH] dma-buf/sw_sync: Replace all non-returning strlcpy with strscpy
Date: Tue, 23 May 2023 10:21:59 -0700 [thread overview]
Message-ID: <202305231021.1AF1342BF@keescook> (raw)
In-Reply-To: <20230523021943.2406847-1-azeemshaikh38@gmail.com>
On Tue, May 23, 2023 at 02:19:43AM +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
next prev parent reply other threads:[~2023-05-23 17:22 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-23 2:19 [PATCH] dma-buf/sw_sync: Replace all non-returning strlcpy with strscpy Azeem Shaikh
2023-05-23 17:21 ` Kees Cook [this message]
2023-05-24 10:39 ` Sumit Semwal
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