netdev - Re: [patch] net: mv643xx_eth: potential NULL dereference in probe()

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Date:	Wed, 13 Nov 2013 09:24:20 +0100
From:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
To:	Dan Carpenter <dan.carpenter@...cle.com>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
CC:	netdev@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [patch] net: mv643xx_eth: potential NULL dereference in probe()

On 11/13/13 08:52, Dan Carpenter wrote:
> We assume that "mp->phy" can be NULL a couple lines before the
> dereference.
>
> Fixes: 1cce16d37d0f ('net: mv643xx_eth: Add missing phy_addr_set in DT mode')
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>

> diff --git a/drivers/net/ethernet/marvell/mv643xx_eth.c b/drivers/net/ethernet/marvell/mv643xx_eth.c
> index 00cd36e..e7905d9 100644
> --- a/drivers/net/ethernet/marvell/mv643xx_eth.c
> +++ b/drivers/net/ethernet/marvell/mv643xx_eth.c
> @@ -2890,7 +2890,8 @@ static int mv643xx_eth_probe(struct platform_device *pdev)
>   					 PHY_INTERFACE_MODE_GMII);
>   		if (!mp->phy)
>   			err = -ENODEV;
> -		phy_addr_set(mp, mp->phy->addr);
> +		else
> +			phy_addr_set(mp, mp->phy->addr);
>   	} else if (pd->phy_addr != MV643XX_ETH_PHY_NONE) {
>   		mp->phy = phy_scan(mp, pd->phy_addr);
>
>

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