From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758986Ab0JVSny (ORCPT ); Fri, 22 Oct 2010 14:43:54 -0400 Received: from kroah.org ([198.145.64.141]:45967 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758889Ab0JVSlf (ORCPT ); Fri, 22 Oct 2010 14:41:35 -0400 X-Mailbox-Line: From gregkh@clark.site Fri Oct 22 11:40:33 2010 Message-Id: <20101022184033.209913125@clark.site> User-Agent: quilt/0.48-11.2 Date: Fri, 22 Oct 2010 11:39:33 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: stable-review@kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Luca Tettamanti , Chris Snook , "David S. Miller" Subject: [08/17] atl1: fix resume In-Reply-To: <20101022184048.GA25391@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2.6.27-stable review patch. If anyone has any objections, please let us know. ------------------ From: Luca Tettamanti commit ec5a32f67c603b11d68eb283d94eb89a4f6cfce1 upstream. adapter->cmb.cmb is initialized when the device is opened and freed when it's closed. Accessing it unconditionally during resume results either in a crash (NULL pointer dereference, when the interface has not been opened yet) or data corruption (when the interface has been used and brought down adapter->cmb.cmb points to a deallocated memory area). Signed-off-by: Luca Tettamanti Acked-by: Chris Snook Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/atlx/atl1.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/drivers/net/atlx/atl1.c +++ b/drivers/net/atlx/atl1.c @@ -2881,10 +2881,11 @@ static int atl1_resume(struct pci_dev *p pci_enable_wake(pdev, PCI_D3cold, 0); atl1_reset_hw(&adapter->hw); - adapter->cmb.cmb->int_stats = 0; - if (netif_running(netdev)) + if (netif_running(netdev)) { + adapter->cmb.cmb->int_stats = 0; atl1_up(adapter); + } netif_device_attach(netdev); return 0;