netdev - net: check before dereferencing netdev

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Date:   Fri, 28 Jun 2019 18:34:58 +0200
From:   Matteo Croce <mcroce@...hat.com>
To:     stable@...r.kernel.org, Sasha Levin <sashal@...nel.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Josh Elsasser <jelsasser@...neta.com>,
        netdev <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: net: check before dereferencing netdev_ops during busy poll

Hi,

Is there any reason for this panic fix not being applied in stable?

https://lore.kernel.org/netdev/20180313053248.13654-1-jelsasser@appneta.com/T/

It seems that linux 4.9.184 has the bug too.

Regards,
-- 
Matteo Croce
per aspera ad upstream