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SubjectBUG: unable to handle kernel NULL pointer dereference at 00000000000001e0
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: [<ffffffffa24bfb6c>] 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:[<ffffffffa24bfb6c>] [<ffffffffa24bfb6c>] 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] <IRQ> [ 428.356216] [<ffffffffa24e0ab1>] uart_write_wakeup+0x21/0x30
[ 428.371337] [<ffffffffa24e8865>] serial8250_tx_chars+0x225/0x240
[ 428.387182] [<ffffffffa24e8a5f>] serial8250_handle_irq.part.21+0xdf/0xf0
[ 428.404405] [<ffffffffa24e8ad7>] serial8250_default_handle_irq+0x47/0x70
[ 428.421603] [<ffffffffa24e4023>] serial8250_interrupt+0x63/0x120
[ 428.437398] [<ffffffffa20e0521>] __handle_irq_event_percpu+0x81/0x1d0
[ 428.454024] [<ffffffffa20e0693>] handle_irq_event_percpu+0x23/0x60
[ 428.470091] [<ffffffffa20e070c>] handle_irq_event+0x3c/0x60
[ 428.484900] [<ffffffffa20e3d10>] handle_edge_irq+0x80/0x150
[ 428.499687] [<ffffffffa20312ad>] handle_irq+0x1d/0x30
[ 428.513458] [<ffffffffa271c22b>] do_IRQ+0x4b/0xd0
[ 428.526456] [<ffffffffa271a282>] common_interrupt+0x82/0x82
[ 428.541125] <EOI> [ 428.544999] [<ffffffffa2718f36>] ? native_safe_halt+0x6/0x10
[ 428.559947] [<ffffffffa2718c10>] default_idle+0x20/0x100
[ 428.574182] [<ffffffffa2038f3f>] arch_cpu_idle+0xf/0x20
[ 428.588183] [<ffffffffa27190b3>] default_idle_call+0x23/0x30
[ 428.603091] [<ffffffffa20c81b1>] cpu_startup_entry+0x1c1/0x230
[ 428.618343] [<ffffffffa270bc94>] rest_init+0x84/0x90
[ 428.631830] [<ffffffffa2d58f7d>] start_kernel+0x438/0x445
[ 428.646182] [<ffffffffa2d58120>] ? early_idt_handler_array+0x120/0x120
[ 428.662761] [<ffffffffa2d582ca>] x86_64_start_reservations+0x24/0x26
[ 428.678952] [<ffffffffa2d5840a>] 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 [<ffffffffa24bfb6c>] tty_wakeup+0xc/0x70
[ 428.755113] RSP <ffff9a1a5fc03df8>
[ 428.765310] CR2: 00000000000001e0

--
Regards/Gruss,
Boris.

ECO tip #101: Trim your mails when you reply.

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