From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757333AbZJLQ3P (ORCPT ); Mon, 12 Oct 2009 12:29:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757314AbZJLQ3O (ORCPT ); Mon, 12 Oct 2009 12:29:14 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:50880 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757304AbZJLQ3O (ORCPT ); Mon, 12 Oct 2009 12:29:14 -0400 Date: Mon, 12 Oct 2009 18:28:19 +0200 From: Ingo Molnar To: Linus Torvalds Cc: Greg KH , Alan Cox , Linux Kernel Mailing List Subject: Re: [crash] NULL pointer dereference at IP: [] uart_close+0x2a/0x1e4 Message-ID: <20091012162819.GE1272@elte.hu> References: <20091012080511.GA22607@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.5 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Linus Torvalds wrote: > On Mon, 12 Oct 2009, Ingo Molnar wrote: > > > > Note, i have your fix below applied in tip:out-of-tree - it might be the > > source of this bug? (If yes then this isnt an .32-rc4 problem.) > > If yes (but you later reported no), it would still be a 32-rc4 > problem, because that patch got committed as 0b5759c654 ("tty: Avoid > dropping ldisc_mutex over hangup tty re-initialization"). > > So you shouldn't need it in the out-of-tree branch any more, and you > probably just never noticed because it all merged cleanly. btw., sidenote: i have about 10 days of test-time for 0b5759c654 now, and it seems to have fixed that rare drivers/char/tty_io.c warning. Ingo