Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751493Ab1CFHIf (ORCPT ); Sun, 6 Mar 2011 02:08:35 -0500 Received: from asset.uwaterloo.ca ([129.97.92.29]:37781 "EHLO asset.uwaterloo.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751029Ab1CFHIe (ORCPT ); Sun, 6 Mar 2011 02:08:34 -0500 Date: Sun, 6 Mar 2011 02:08:32 -0500 From: j223yang@asset.uwaterloo.ca To: rdunlap@xenotime.net Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [Patch] ariadne: fix possible null dereference Message-ID: <20110306070832.GA26188@asset.uwaterloo.ca> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.20 (2009-08-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1538 Lines: 42 Hi Randy, I have tested my patch, and it is ok now. Could you please try patching again? Sorry for previous trouble. Thank you! Jinqiu ------------------------------------------------------ This patch fixes bugzilla #13853: https://bugzilla.kernel.org/show_bug.cgi?id=13853 The patch removes dereference of 'dev' after testing for NULL. Signed-off-by: Jinqiu Yang --- ariadne.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/ariadne.c b/drivers/net/ariadne.c --- a/drivers/net/ariadne.c 2011-03-04 11:16:42.332164362 -0500 +++ b/drivers/net/ariadne.c 2011-03-05 21:11:52.949164759 -0500 @@ -420,7 +420,7 @@ static inline void ariadne_reset(struct static irqreturn_t ariadne_interrupt(int irq, void *data) { struct net_device *dev = (struct net_device *)data; - volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr; + volatile struct Am79C960 *lance; struct ariadne_private *priv; int csr0, boguscnt; int handled = 0; @@ -430,6 +430,7 @@ static irqreturn_t ariadne_interrupt(int return IRQ_NONE; } + lance = (struct Am79C960 *)dev->base_addr; lance->RAP = CSR0; /* PCnet-ISA Controller Status */ if (!(lance->RDP & INTR)) /* Check if any interrupt has been */ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/