From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759985Ab3BZVZg (ORCPT ); Tue, 26 Feb 2013 16:25:36 -0500 Received: from mail-oa0-f47.google.com ([209.85.219.47]:47591 "EHLO mail-oa0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752163Ab3BZVZf (ORCPT ); Tue, 26 Feb 2013 16:25:35 -0500 Message-ID: <512D284B.8070802@lwfinger.net> Date: Tue, 26 Feb 2013 15:25:31 -0600 From: Larry Finger User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130105 Thunderbird/17.0.2 MIME-Version: 1.0 To: Greg Kroah-Hartman , Jiri Slaby CC: LKML Subject: WARNING from tty driver in 3.9-rc0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, With v3.8-8693-gbf722a0 from the mainline repo, I get the following warning because the pointer for tty is NULL: [ 34.956862] WARNING: at drivers/tty/tty_buffer.c:428 flush_to_ldisc+0x1bb/0x1c0() [ 34.956865] Hardware name: HP Pavilion dv2700 Notebook PC [ 34.956867] tty is NULL [ 34.956869] Modules linked in: arc4 b43 mac80211 cfg80211 snd_hda_codec_conexant snd_hda_intel rfkill snd_hda_codec ipv6 snd_pcm kvm_amd snd_seq kvm bcma rng_core snd_timer snd_seq_device ssb mmc_core snd pcmcia sr_mod cdrom sg soundcore forcedeth pcmcia_core snd_page_alloc i2c_nforce2 i2c_core k8temp hwmon ehci_pci battery ac serio_raw joydev video wmi button autofs4 ext4 mbcache jbd2 crc16 ohci_hcd ehci_hcd usbcore usb_common thermal processor scsi_dh_alua scsi_dh_hp_sw scsi_dh_rdac scsi_dh_emc scsi_dh ata_generic pata_acpi pata_amd [ 34.956936] Pid: 270, comm: kworker/1:1 Not tainted 3.8.0+ #92 [ 34.956939] Call Trace: [ 34.956944] [] ? flush_to_ldisc+0x120/0x1c0 [ 34.956951] [] warn_slowpath_common+0x7a/0xc0 [ 34.956955] [] warn_slowpath_fmt+0x41/0x50 [ 34.956959] [] flush_to_ldisc+0x1bb/0x1c0 [ 34.956964] [] process_one_work+0x1f1/0x660 [ 34.956968] [] ? process_one_work+0x185/0x660 [ 34.956972] [] worker_thread+0x110/0x380 [ 34.956978] [] ? trace_hardirqs_on+0xd/0x10 [ 34.956982] [] ? rescuer_thread+0x250/0x250 [ 34.956987] [] kthread+0xd6/0xe0 [ 34.956992] [] ? _raw_spin_unlock_irq+0x2b/0x50 [ 34.956997] [] ? __init_kthread_worker+0x70/0x70 [ 34.957002] [] ret_from_fork+0x7c/0xb0 [ 34.957006] [] ? __init_kthread_worker+0x70/0x70 [ 34.957009] ---[ end trace f467d4f2302660c1 ]--- [ 35.585060] forcedeth 0000:00:0a.0: irq 42 for MSI/MSI-X [ 35.585182] forcedeth 0000:00:0a.0 eth0: MSI enabled [ 36.140711] ------------[ cut here ]------------ I have not yet bisected this problem yet; however, I can if requested. Being lazy, I hope that someone already has a patch, or can see the problem by inspection. :) Thanks. Larry