From 3b4c5cbf42bda976ab70354e7786a0808265d9d5 Mon Sep 17 00:00:00 2001 From: Sergei Shtylyov Date: Wed, 30 Oct 2013 23:30:19 +0300 Subject: [PATCH] sh_eth: check platform data pointer Check the platform data pointer before dereferencing it and error out of the probe() method if it's NULL. This has additional effect of preventing kernel oops with outdated platform data containing zero PHY address instead (such as on SolutionEngine7710). Signed-off-by: Sergei Shtylyov Acked-by: Simon Horman Signed-off-by: David S. Miller --- drivers/net/ethernet/renesas/sh_eth.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c index eaf11e47334f..d256ce19d4de 100644 --- a/drivers/net/ethernet/renesas/sh_eth.c +++ b/drivers/net/ethernet/renesas/sh_eth.c @@ -2663,6 +2663,12 @@ static int sh_eth_drv_probe(struct platform_device *pdev) pm_runtime_enable(&pdev->dev); pm_runtime_resume(&pdev->dev); + if (!pd) { + dev_err(&pdev->dev, "no platform data\n"); + ret = -EINVAL; + goto out_release; + } + /* get PHY ID */ mdp->phy_id = pd->phy; mdp->phy_interface = pd->phy_interface; -- 2.20.1