Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760128AbXEQAu5 (ORCPT ); Wed, 16 May 2007 20:50:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757264AbXEQAus (ORCPT ); Wed, 16 May 2007 20:50:48 -0400 Received: from gate.crashing.org ([63.228.1.57]:49691 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756359AbXEQAur (ORCPT ); Wed, 16 May 2007 20:50:47 -0400 Subject: Re: Resending: RT patches expose netdev race [was Re: [RFC] [patch 2/2] powerpc 2.6.21-rt1: fix kernel hang and/or panic From: Benjamin Herrenschmidt To: Linas Vepstas Cc: Tsutomu OWA , linuxppc-dev@ozlabs.org, mingo@elte.hu, tglx@linutronix.de, cbe-oss-dev@ozlabs.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20070517002751.GC4325@austin.ibm.com> References: <20070517002751.GC4325@austin.ibm.com> Content-Type: text/plain Date: Thu, 17 May 2007 10:49:45 +1000 Message-Id: <1179362985.32247.252.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.10.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 542 Lines: 16 > I do not know why sk_buff->head would be null, or > would be set in a racy kind of way, or why the rt patches > would cause this. But the evidence implicates that. Would it be possible that a locking bug in spidernet would cause it under some circumstances to get a stale skb pointer ? Ben. - 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/