From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755377AbZCJNfE (ORCPT ); Tue, 10 Mar 2009 09:35:04 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754106AbZCJNew (ORCPT ); Tue, 10 Mar 2009 09:34:52 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:54700 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753268AbZCJNev (ORCPT ); Tue, 10 Mar 2009 09:34:51 -0400 Date: Tue, 10 Mar 2009 14:34:43 +0100 From: Ingo Molnar To: Yinghai Lu , Vegard Nossum Cc: Greg KH , Linux Kernel Mailing List Subject: Re: panic with strcmp Message-ID: <20090310133443.GC29391@elte.hu> References: <86802c440903091251x41899167r96680c62c35ad63b@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <86802c440903091251x41899167r96680c62c35ad63b@mail.gmail.com> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean 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 (Vegard Cc:-ed. Incidentally he found a use-after-free bug via kmemcheck in the sysfs code. Could it be related?) * Yinghai Lu wrote: > happen on kexec loop test, it seems it only do kexec three > time continuous. only on one two sockets with quad core > opteron + 16 sas disks. > > YH > > [ 11.139038] calling pty_init+0x0/0x606 @ 1 > [ 11.163070] general protection fault: 0000 [#1] SMP > [ 11.167058] last sysfs file: > [ 11.167058] CPU 5 > [ 11.167058] Modules linked in: > [ 11.167058] Pid: 1, comm: swapper Not tainted > 2.6.29-rc7-tip-02233-ga94bfce-dirty #736 SMP Mon Mar 9 11:24:51 PDT > 2009 Sun Fire X4240 > [ 11.167058] RIP: 0010:[] [] > strcmp+0x19/0x45 > [ 11.167058] RSP: 0018:ffff8804270499f0 EFLAGS: 00010246 > [ 11.167058] RAX: 0000000000000000 RBX: ffff88042403e050 RCX: ffff880424776270 > [ 11.167058] RDX: 0000000000000000 RSI: ffff880224676080 RDI: 0010c2c018100dbf > [ 11.167058] RBP: ffff880427049a00 R08: 0000000000000001 R09: ffff880427049978 > [ 11.167058] R10: 000000003ce73f1d R11: 000000003ce73f20 R12: ffff880224676080 > [ 11.167058] R13: ffff880427049ab0 R14: ffff880424776280 R15: ffff880427049b28 > [ 11.167058] FS: 0000000000000000(0000) GS:ffffc20000069000(0000) > knlGS:0000000000000000 > [ 11.167058] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b > [ 11.167058] CR2: 0000000000000000 CR3: 0000000000201000 CR4: 00000000000006e0 > [ 11.167058] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > [ 11.167058] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 > [ 11.167058] Process swapper (pid: 1, threadinfo ffff880427048000, > task ffff880227060000) > [ 11.167058] Stack: > [ 11.167058] 0000000000000006 000000003ce73f1d ffff880427049a30 > ffffffff8034562e > [ 11.167058] ffff880227c0b800 000000003ce73f1d ffff880224675f50 > ffff880224675f50 > [ 11.167058] ffff880427049a70 ffffffff803457ed 0000000000000001 > ffff880427049a6c > [ 11.167058] Call Trace: > [ 11.167058] [] sysfs_find_dirent+0x2f/0x5a > [ 11.167058] [] __sysfs_add_one+0x2e/0xd8 > [ 11.167058] [] sysfs_add_one+0x22/0x68 > [ 11.167058] [] create_dir+0x67/0xb6 > [ 11.167058] [] sysfs_create_dir+0x47/0x72 > [ 11.167058] [] kobject_add_internal+0xe4/0x1ba > [ 11.167058] [] kobject_add_varg+0x50/0x73 > [ 11.167058] [] kobject_add+0x73/0x89 > [ 11.167058] [] device_add+0xcf/0x56f > [ 11.167058] [] ? kobject_init+0x56/0xac > [ 11.167058] [] device_register+0x28/0x43 > [ 11.167058] [] device_create_vargs+0xae/0xf0 > [ 11.167058] [] device_create+0x3b/0x51 > [ 11.167058] [] ? kobj_map+0x12f/0x154 > [ 11.167058] [] tty_register_device+0xe9/0x10a > [ 11.167058] [] tty_register_driver+0x1e3/0x221 > [ 11.167058] [] ? pty_init+0x0/0x606 > [ 11.167058] [] pty_init+0x2ae/0x606 > [ 11.167058] [] do_one_initcall+0x65/0x14e > [ 11.167058] [] kernel_init+0x14a/0x1b6 > [ 11.167058] [] child_rip+0xa/0x20 > [ 11.167058] [] ? kernel_init+0x0/0x1b6 > [ 11.167058] [] ? child_rip+0x0/0x20 > [ 11.167058] Code: 14 25 28 00 00 00 48 89 f8 74 05 e8 57 98 d3 ff > c9 c3 55 31 d2 48 89 e5 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 > 45 f8 31 c0 <8a> 0c 17 88 c8 2a 04 16 84 c0 75 07 48 ff c2 84 c9 75 ed > 48 8b > [ 11.167058] RIP [] strcmp+0x19/0x45 > [ 11.167058] RSP > [ 11.461778] ---[ end trace 800948b0be98e94c ]---