linux-kernel - Re: [PATCH v2] net: usb: rtl8150: prevent set_ethernet

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Date:   Fri, 02 Oct 2020 15:38:49 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     anant.thazhemadam@...il.com
Cc:     linux-kernel-mentees@...ts.linuxfoundation.org,
        syzbot+abbc768b560c84d92fd3@...kaller.appspotmail.com,
        petkan@...leusys.com, kuba@...nel.org, linux-usb@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] net: usb: rtl8150: prevent set_ethernet_addr from
 setting uninit address

From: Anant Thazhemadam <anant.thazhemadam@...il.com>
Date: Fri, 2 Oct 2020 17:04:13 +0530

> But this patch is about ensuring that an uninitialized variable's
> value (whatever that may be) is not set as the ethernet address
> blindly (without any form of checking if get_registers() worked
> as expected, or not).

Right, and if you are going to check for errors then you have to
handle the error properly.

And the proper way to handle this error is to set a random ethernet
address on the device.