From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752818AbaKGNWz (ORCPT ); Fri, 7 Nov 2014 08:22:55 -0500 Received: from mail-pd0-f170.google.com ([209.85.192.170]:36854 "EHLO mail-pd0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752621AbaKGNWu (ORCPT ); Fri, 7 Nov 2014 08:22:50 -0500 From: Sudip Mukherjee To: Steve Glendinning Cc: Sudip Mukherjee , netdev@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] usbnet: smsc95xx: dereferencing NULL pointer Date: Fri, 7 Nov 2014 18:52:40 +0530 Message-Id: <1415366560-27614-1-git-send-email-sudipm.mukherjee@gmail.com> X-Mailer: git-send-email 1.8.1.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org we were dereferencing dev to initialize pdata. but just after that we have a BUG_ON(!dev). so we were basically dereferencing the pointer first and then tesing it for NULL. Signed-off-by: Sudip Mukherjee --- drivers/net/usb/smsc95xx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c index d07bf4c..3393238 100644 --- a/drivers/net/usb/smsc95xx.c +++ b/drivers/net/usb/smsc95xx.c @@ -1670,12 +1670,13 @@ done: static int smsc95xx_resume(struct usb_interface *intf) { struct usbnet *dev = usb_get_intfdata(intf); - struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); + struct smsc95xx_priv *pdata; u8 suspend_flags = pdata->suspend_flags; int ret; u32 val; BUG_ON(!dev); + pdata = (struct smsc95xx_priv *)(dev->data[0]); netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); -- 1.8.1.2