linux-kernel - Re: [PATCH net v4] net/ncsi: handle overflow when incrementing mac address

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Message-ID: <20190423184433.764674b8@cakuba.netronome.com>
Date:   Tue, 23 Apr 2019 18:44:33 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     Tao Ren <taoren@...com>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Maxim Mikityanskiy <maximmi@...lanox.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Samuel Mendoza-Jonas <sam@...dozajonas.com>,
        Joel Stanley <joel@....id.au>,
        Andrew Jeffery <andrew@...id.au>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "openbmc@...ts.ozlabs.org" <openbmc@...ts.ozlabs.org>
Subject: Re: [PATCH net v4] net/ncsi: handle overflow when incrementing mac
 address

On Wed, 24 Apr 2019 01:43:32 +0000, Tao Ren wrote:
> Previously BMC's MAC address is calculated by simply adding 1 to the
> last byte of network controller's MAC address, and it produces incorrect
> result when network controller's MAC address ends with 0xFF.
> 
> The problem can be fixed by calling eth_addr_inc() function to increment
> MAC address; besides, the MAC address is also validated before assigning
> to BMC.
> 
> Fixes: cb10c7c0dfd9 ("net/ncsi: Add NCSI Broadcom OEM command")
> Signed-off-by: Tao Ren <taoren@...com>

Acked-by: Jakub Kicinski <jakub.kicinski@...ronome.com>