linux-hardening - Re: [PATCH net-next 0/3] virtchnl: fix fake 1-elem arrays

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Message-ID: <a8466f4b-f773-4d0a-f22b-34c83a7aa942@intel.com>
Date:   Thu, 3 Aug 2023 17:55:43 +0200
From:   Alexander Lobakin <aleksander.lobakin@...el.com>
To:     "David S. Miller" <davem@...emloft.net>
CC:     Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Larysa Zaremba <larysa.zaremba@...el.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Kees Cook <keescook@...omium.org>, <netdev@...r.kernel.org>,
        <linux-hardening@...r.kernel.org>,
        <intel-wired-lan@...ts.osuosl.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next 0/3] virtchnl: fix fake 1-elem arrays

From: Alexander Lobakin <aleksander.lobakin@...el.com>
Date: Fri, 28 Jul 2023 17:52:04 +0200

> 6.5-rc1 started spitting warning splats when composing virtchnl
> messages, precisely on virtchnl_rss_key and virtchnl_lut:
> 
> [   84.167709] memcpy: detected field-spanning write (size 52) of single
> field "vrk->key" at drivers/net/ethernet/intel/iavf/iavf_virtchnl.c:1095
> (size 1)
> [   84.169915] WARNING: CPU: 3 PID: 11 at drivers/net/ethernet/intel/
> iavf/iavf_virtchnl.c:1095 iavf_set_rss_key+0x123/0x140 [iavf]

(tender ping :D)

Thanks,
Olek