linux-kernel - Re: [PATCH net-next v1 1/1] net: phy: at803x: fix NULL pointer dereference on AR9331 PHY

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Message-ID: <YqsyRxNsG3AYrfnX@lunn.ch>
Date:   Thu, 16 Jun 2022 15:38:15 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     Heiner Kallweit <hkallweit1@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, kernel@...gutronix.de,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH net-next v1 1/1] net: phy: at803x: fix NULL pointer
 dereference on AR9331 PHY

On Thu, Jun 16, 2022 at 01:31:05PM +0200, Oleksij Rempel wrote:
> Latest kernel will explode on the PHY interrupt config, since it depends
> now on allocated priv. So, run probe to allocate priv to fix it.
> 
> Fixes: 3265f4218878 ("net: phy: at803x: add fiber support")
> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
> ---
>  drivers/net/phy/at803x.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c
> index 6a467e7817a6..b72a807f2e03 100644
> --- a/drivers/net/phy/at803x.c
> +++ b/drivers/net/phy/at803x.c
> @@ -2072,6 +2072,8 @@ static struct phy_driver at803x_driver[] = {
>  	/* ATHEROS AR9331 */
>  	PHY_ID_MATCH_EXACT(ATH9331_PHY_ID),
>  	.name			= "Qualcomm Atheros AR9331 built-in PHY",
> +	.probe			= at803x_probe,
> +	.remove			= at803x_remove,
>  	.suspend		= at803x_suspend,
>  	.resume			= at803x_resume,
>  	.flags			= PHY_POLL_CABLE_TEST,

Is the same change needed for some of the other PHYs? QCA8081?
QCA9561?

	Andrew