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Date:   Fri, 16 Apr 2021 12:53:36 -0700
From:   Kees Cook <keescook@chromium.org>
To:     "Gustavo A. R. Silva" <gustavoars@kernel.org>
Cc:     Vlad Yasevich <vyasevich@gmail.com>,
        Neil Horman <nhorman@tuxdriver.com>,
        Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>,
        "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>, linux-sctp@vger.kernel.org,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-hardening@vger.kernel.org
Subject: Re: [PATCH][next] sctp: Fix out-of-bounds warning in
 sctp_process_asconf_param()
Message-ID: <202104161249.D889C975D9@keescook>
References: <20210416191236.GA589296@embeddedor>
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In-Reply-To: <20210416191236.GA589296@embeddedor>
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On Fri, Apr 16, 2021 at 02:12:36PM -0500, Gustavo A. R. Silva wrote:
> Fix the following out-of-bounds warning:
> 
> net/sctp/sm_make_chunk.c:3150:4: warning: 'memcpy' offset [17, 28] from the object at 'addr' is out of the bounds of referenced subobject 'v4' with type 'struct sockaddr_in' at offset 0 [-Warray-bounds]
> 
> This helps with the ongoing efforts to globally enable -Warray-bounds
> and get us closer to being able to tighten the FORTIFY_SOURCE routines
> on memcpy().
> 
> Link: https://github.com/KSPP/linux/issues/109
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>

Yup!

Reviewed-by: Kees Cook <keescook@chromium.org>

-- 
Kees Cook