netdev - Re: [PATCH net] net: phy: marvell10g: fix null pointer dereference

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Message-Id: <20200811.154331.1038492033389879139.davem@davemloft.net>
Date:   Tue, 11 Aug 2020 15:43:31 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     marek.behun@....cz
Cc:     netdev@...r.kernel.org, maxime.chevallier@...tlin.com,
        andrew@...n.ch, baruch@...s.co.il, rmk+kernel@...linux.org.uk
Subject: Re: [PATCH net] net: phy: marvell10g: fix null pointer dereference

From: Marek Behún <marek.behun@....cz>
Date: Mon, 10 Aug 2020 17:01:58 +0200

> Commit c3e302edca24 ("net: phy: marvell10g: fix temperature sensor on 2110")
> added a check for PHY ID via phydev->drv->phy_id in a function which is
> called by devres at a time when phydev->drv is already set to null by
> phy_remove function.
> 
> This null pointer dereference can be triggered via SFP subsystem with a
> SFP module containing this Marvell PHY. When the SFP interface is put
> down, the SFP subsystem removes the PHY.
> 
> Fixes: c3e302edca24 ("net: phy: marvell10g: fix temperature sensor on 2110")
> Signed-off-by: Marek Behún <marek.behun@....cz>

Applied and queued up for -stable, thank you.