Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965189AbcJXOsx (ORCPT ); Mon, 24 Oct 2016 10:48:53 -0400 Received: from mail.skyhub.de ([78.46.96.112]:39540 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964974AbcJXOst (ORCPT ); Mon, 24 Oct 2016 10:48:49 -0400 Date: Mon, 24 Oct 2016 16:48:31 +0200 From: Borislav Petkov To: linux-serial@vger.kernel.org Cc: Greg Kroah-Hartman , Jiri Slaby , linux-kernel@vger.kernel.org Subject: BUG: unable to handle kernel NULL pointer dereference at 00000000000001e0 Message-ID: <20161024144831.a4ieul22jck4vwk3@pd.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline User-Agent: NeoMutt/20161014 (1.7.1) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4289 Lines: 59 Hi people, typing "reboot" splats the following on the serial console. Ideas? INIT: Sending p[ 427.863916] BUG: unable to handle kernel NULL pointer dereference at 00000000000001e0 [ 427.885156] IP: [] tty_wakeup+0xc/0x70 [ 427.898337] PGD 0 [ 427.902051] [ 427.907498] Oops: 0000 [#1] PREEMPT SMP [ 427.917635] Modules linked in: nfsv3 nfs_acl nfs fscache lockd sunrpc grace edd af_packet cpufreq_conservative cpufreq_userspace cpufreq_powersave fuse loop md_mod dm_mod joydev hid_generic usbhid ipmi_ssif ohci_pci ohci_hcd ehci_pci ehci_hcd e1000e ptp firewire_ohci edac_core pps_core tpm_infineon sp5100_tco firewire_core acpi_cpufreq serio_raw pcspkr fjes usbcore shpchp edac_mce_amd tpm_tis ipmi_si tpm_tis_core i2c_piix4 k10temp sg ipmi_msghandler tpm sr_mod button cdrom kvm_amd kvm irqbypass crc_itu_t ast ttm drm_kms_helper drm fb_sys_fops sysimgblt sysfillrect syscopyarea i2c_algo_bit scsi_dh_rdac scsi_dh_alua scsi_dh_emc scsi_dh_hp_sw ata_generic pata_atiixp [ 428.054179] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.0-rc1-1.g73e3f23-default #1 [ 428.072868] Hardware name: System manufacturer System Product Name/KGP(M)E-D16, BIOS 0902 12/03/2010 [ 428.094755] task: ffffffffa2c0d500 task.stack: ffffffffa2c00000 [ 428.109717] RIP: 0010:[] [] tty_wakeup+0xc/0x70 [ 428.128407] RSP: 0018:ffff9a1a5fc03df8 EFLAGS: 00010086 [ 428.142184] RAX: ffff9a1857258000 RBX: ffffffffa3050ea0 RCX: 0000000000000000 [ 428.159649] RDX: 000000000000001b RSI: 0000000000000000 RDI: 0000000000000000 [ 428.177109] RBP: ffff9a1a5fc03e08 R08: 0000000000000000 R09: 0000000000000000 [ 428.194547] R10: 0000000000021c77 R11: 0000000000000000 R12: ffff9a1857258000 [ 428.212002] R13: 0000000000000000 R14: 0000000000000020 R15: 0000000000000020 [ 428.229481] FS: 0000000000000000(0000) GS:ffff9a1a5fc00000(0000) knlGS:0000000000000000 [ 428.248938] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 428.263726] CR2: 00000000000001e0 CR3: 0000000390c06000 CR4: 00000000000006f0 [ 428.281331] Stack: [ 428.288696] ffffffffa3050ea0 ffff9a1857258000 ffff9a1a5fc03e18 ffffffffa24e0ab1 [ 428.307064] ffff9a1a5fc03e40 ffffffffa24e8865 ffffffffa3050ea0 00000000000000c2 [ 428.325456] 0000000000000046 ffff9a1a5fc03e78 ffffffffa24e8a5f ffffffffa3050ea0 [ 428.343905] Call Trace: [ 428.352319] [ 428.356216] [] uart_write_wakeup+0x21/0x30 [ 428.371337] [] serial8250_tx_chars+0x225/0x240 [ 428.387182] [] serial8250_handle_irq.part.21+0xdf/0xf0 [ 428.404405] [] serial8250_default_handle_irq+0x47/0x70 [ 428.421603] [] serial8250_interrupt+0x63/0x120 [ 428.437398] [] __handle_irq_event_percpu+0x81/0x1d0 [ 428.454024] [] handle_irq_event_percpu+0x23/0x60 [ 428.470091] [] handle_irq_event+0x3c/0x60 [ 428.484900] [] handle_edge_irq+0x80/0x150 [ 428.499687] [] handle_irq+0x1d/0x30 [ 428.513458] [] do_IRQ+0x4b/0xd0 [ 428.526456] [] common_interrupt+0x82/0x82 [ 428.541125] [ 428.544999] [] ? native_safe_halt+0x6/0x10 [ 428.559947] [] default_idle+0x20/0x100 [ 428.574182] [] arch_cpu_idle+0xf/0x20 [ 428.588183] [] default_idle_call+0x23/0x30 [ 428.603091] [] cpu_startup_entry+0x1c1/0x230 [ 428.618343] [] rest_init+0x84/0x90 [ 428.631830] [] start_kernel+0x438/0x445 [ 428.646182] [] ? early_idt_handler_array+0x120/0x120 [ 428.662761] [] x86_64_start_reservations+0x24/0x26 [ 428.678952] [] x86_64_start_kernel+0x13e/0x14d [ 428.694421] Code: 00 ba 01 00 00 00 be 01 00 00 00 e8 4f 78 c0 ff 5b 5d c3 66 90 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 41 54 53 <48> 8b 87 e0 01 00 00 48 89 fb a8 20 75 20 48 8d bb 30 02 00 00 [ 428.740966] RIP [] tty_wakeup+0xc/0x70 [ 428.755113] RSP [ 428.765310] CR2: 00000000000001e0 -- Regards/Gruss, Boris. ECO tip #101: Trim your mails when you reply.