From: Byungho An Date: Fri, 28 Mar 2014 17:57:44 +0000 (-0700) Subject: net: sxgbe: fix potential null dereference X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=2405e8f64c14a2cc9967f1f9bbeb1ba48b6cc2a1;p=sagit-ice-cold%2Fkernel_xiaomi_msm8998.git net: sxgbe: fix potential null dereference This fixes following: drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c:1828 sxgbe_hw_init() error: potential null dereference 'priv->hw'. (kmalloc returns null) Reported-by: kbuild test robot Signed-off-by: Byungho An Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c index ee1fd3c4568f..a72688e8dc6c 100644 --- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c +++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c @@ -2039,11 +2039,13 @@ static void sxgbe_get_ops(struct sxgbe_ops * const ops_ptr) * Description: this function checks the HW capability * (if supported) and sets the driver's features. */ -static void sxgbe_hw_init(struct sxgbe_priv_data * const priv) +static int sxgbe_hw_init(struct sxgbe_priv_data * const priv) { u32 ctrl_ids; priv->hw = kmalloc(sizeof(*priv->hw), GFP_KERNEL); + if(!priv->hw) + return -ENOMEM; /* get the hardware ops */ sxgbe_get_ops(priv->hw); @@ -2064,6 +2066,8 @@ static void sxgbe_hw_init(struct sxgbe_priv_data * const priv) if (priv->hw_cap.rx_csum_offload) pr_info("RX Checksum offload supported\n"); + + return 0; } /** @@ -2102,7 +2106,9 @@ struct sxgbe_priv_data *sxgbe_drv_probe(struct device *device, sxgbe_verify_args(); /* Init MAC and get the capabilities */ - sxgbe_hw_init(priv); + ret = sxgbe_hw_init(priv); + if (ret) + goto error_free_netdev; /* allocate memory resources for Descriptor rings */ ret = txring_mem_alloc(priv);