Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932069AbWAYQ7m (ORCPT ); Wed, 25 Jan 2006 11:59:42 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932074AbWAYQ7m (ORCPT ); Wed, 25 Jan 2006 11:59:42 -0500 Received: from gateway-1237.mvista.com ([63.81.120.158]:19957 "EHLO hermes.mvista.com") by vger.kernel.org with ESMTP id S932069AbWAYQ7l (ORCPT ); Wed, 25 Jan 2006 11:59:41 -0500 Subject: Re: [patch, lock validator] fix uidhash_lock <-> RCU deadlock From: Daniel Walker To: Ingo Molnar Cc: Linus Torvalds , Andrew Morton , linux-kernel@vger.kernel.org, Arjan van de Ven , "Paul E. McKenney" In-Reply-To: <20060125142307.GA5427@elte.hu> References: <20060125142307.GA5427@elte.hu> Content-Type: text/plain Date: Wed, 25 Jan 2006 08:59:37 -0800 Message-Id: <1138208378.3992.7.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-2.fc4) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 532 Lines: 15 On Wed, 2006-01-25 at 15:23 +0100, Ingo Molnar wrote: > RCU task-struct freeing can call free_uid(), which is taking > uidhash_lock - while other users of uidhash_lock are softirq-unsafe. > > This bug was found by the lock validator i'm working on: What is it doing exactly ? Daniel - 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/