[Bug 580334] Re: Can't open device /dev/noz0

Fri Jul 16 14:15:51 UTC 2010

Jul 16 13:50:11 marekdeb kernel: [   38.113511] Warning: dev (noz0) tty->count(0) != #fd's(1) in tty_open
Jul 16 13:50:11 marekdeb kernel: [   38.113518] noz: activated 0: efbdc860
Jul 16 13:50:11 marekdeb kernel: [   38.113562] BUG: unable to handle kernel NULL pointer dereference at 000000bc
Jul 16 13:50:11 marekdeb kernel: [   38.113568] IP: [<c05c982b>] mutex_lock+0x1b/0x40
Jul 16 13:50:11 marekdeb kernel: [   38.113580] *pde = 00000000
Jul 16 13:50:11 marekdeb kernel: [   38.113583] Oops: 0002 [#1] SMP
Jul 16 13:50:11 marekdeb kernel: [   38.113587] last sysfs file: /sys/devices/pci0000:00/0000:00:14.4/0000:02:06.0/net/mon.wlan0/flags
Jul 16 13:50:11 marekdeb kernel: [   38.113591] Modules linked in: binfmt_misc radeon ttm drm_kms_helper drm i2c_algo_bit nozomi snd_hda_codec_realtek xt_state snd_hda_intel xt_tcpudp ipt_MASQUERADE iptable_nat nf_nat snd_hda_codec nf_conntrack_ipv4 snd_hwdep snd_pcm snd_seq_midi nf_conntrack arc4 snd_rawmidi nf_defrag_ipv4 snd_seq_midi_event iptable_filter snd_seq ath5k pcmcia ip_tables snd_timer snd_seq_device x_tables ppdev mac80211 yenta_socket snd pcmcia_rsrc parport_pc ath soundcore pcmcia_core parport cfg80211 led_class ati_agp snd_page_alloc serio_raw agpgart i2c_piix4 shpchp k8temp r8169 ahci pata_atiixp mii libahci
Jul 16 13:50:11 marekdeb kernel: [   38.113634]
Jul 16 13:50:11 marekdeb kernel: [   38.113638] Pid: 1652, comm: wvdial Not tainted 2.6.35-020635rc5-generic #020635rc5 GA-MA69VM-S2/GA-MA69VM-S2
Jul 16 13:50:11 marekdeb kernel: [   38.113642] EIP: 0060:[<c05c982b>] EFLAGS: 00210246 CPU: 0
Jul 16 13:50:11 marekdeb kernel: [   38.113646] EIP is at mutex_lock+0x1b/0x40
Jul 16 13:50:11 marekdeb kernel: [   38.113649] EAX: 000000bc EBX: 000000bc ECX: e8862000 EDX: 00000000
Jul 16 13:50:11 marekdeb kernel: [   38.113652] ESI: 00001000 EDI: 000000bc EBP: e7eb5afc ESP: e7eb5af4
Jul 16 13:50:11 marekdeb kernel: [   38.113655]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Jul 16 13:50:11 marekdeb kernel: [   38.113658] Process wvdial (pid: 1652, ti=e7eb4000 task=e990a610 task.ti=e7eb4000)
Jul 16 13:50:11 marekdeb kernel: [   38.113660] Stack:
Jul 16 13:50:11 marekdeb kernel: [   38.113662]  00000000 00001000 e7eb5b10 f84b8a3d e8862000 00000000 e8862000 e7eb5b18
Jul 16 13:50:11 marekdeb kernel: [   38.113669] <0> c03ddb3d e7eb5b30 c03dc485 efb0c300 efb0c300 e8862000 c03dc360 e7eb5b50
Jul 16 13:50:11 marekdeb kernel: [   38.113676] <0> c03d7723 00000000 e7f03b90 00000000 00000010 efb0c300 00000004 e7eb5e44
Jul 16 13:50:11 marekdeb kernel: [   38.113683] Call Trace:
Jul 16 13:50:11 marekdeb kernel: [   38.113691]  [<f84b8a3d>] ? ntty_write_room+0x4d/0xa0 [nozomi]
Jul 16 13:50:11 marekdeb kernel: [   38.113698]  [<c03ddb3d>] ? tty_write_room+0x1d/0x20
Jul 16 13:50:11 marekdeb kernel: [   38.113702]  [<c03dc485>] ? n_tty_poll+0x125/0x170
Jul 16 13:50:11 marekdeb kernel: [   38.113706]  [<c03dc360>] ? n_tty_poll+0x0/0x170
Jul 16 13:50:11 marekdeb kernel: [   38.113710]  [<c03d7723>] ? tty_poll+0x73/0x80
Jul 16 13:50:11 marekdeb kernel: [   38.113716]  [<c022a2ff>] ? do_select+0x25f/0x500
Jul 16 13:50:11 marekdeb kernel: [   38.113720]  [<c022a5a0>] ? __pollwait+0x0/0x70
Jul 16 13:50:11 marekdeb kernel: [   38.113726]  [<c016ecd8>] ? sched_clock_local+0xf8/0x1a0
Jul 16 13:50:11 marekdeb kernel: [   38.113732]  [<c035409d>] ? format_decode+0x2fd/0x360
Jul 16 13:50:11 marekdeb kernel: [   38.113736]  [<c03555f9>] ? vsnprintf+0x299/0x3a0
Jul 16 13:50:11 marekdeb kernel: [   38.113741]  [<c012e908>] ? default_spin_lock_flags+0x8/0x10
Jul 16 13:50:11 marekdeb kernel: [   38.113746]  [<c05cabcf>] ? _raw_spin_lock_irqsave+0x2f/0x50
Jul 16 13:50:11 marekdeb kernel: [   38.113752]  [<c014e85c>] ? release_console_sem+0xac/0xd0
Jul 16 13:50:11 marekdeb kernel: [   38.113756]  [<c035409d>] ? format_decode+0x2fd/0x360
Jul 16 13:50:11 marekdeb kernel: [   38.113760]  [<c03555f9>] ? vsnprintf+0x299/0x3a0
Jul 16 13:50:11 marekdeb kernel: [   38.113764]  [<c014ee09>] ? printk+0x29/0x40
Jul 16 13:50:11 marekdeb kernel: [   38.113769]  [<f84b89c1>] ? ntty_activate+0xd1/0x100 [nozomi]
Jul 16 13:50:11 marekdeb kernel: [   38.113775]  [<c03e0dd9>] ? tty_port_block_til_ready+0x1b9/0x240
Jul 16 13:50:11 marekdeb kernel: [   38.113779]  [<c013afd5>] ? __wake_up+0x45/0x60
Jul 16 13:50:11 marekdeb kernel: [   38.113783]  [<c012e908>] ? default_spin_lock_flags+0x8/0x10
Jul 16 13:50:11 marekdeb kernel: [   38.113788]  [<c05cabcf>] ? _raw_spin_lock_irqsave+0x2f/0x50
Jul 16 13:50:11 marekdeb kernel: [   38.113793]  [<c0168d00>] ? autoremove_wake_function+0x0/0x40
Jul 16 13:50:11 marekdeb kernel: [   38.113797]  [<c03e0efa>] ? tty_port_open+0x9a/0xc0
Jul 16 13:50:11 marekdeb kernel: [   38.113802]  [<c05cb043>] ? _unlock_kernel+0x33/0x75
Jul 16 13:50:11 marekdeb kernel: [   38.113806]  [<c03dac97>] ? tty_open+0x417/0x480
Jul 16 13:50:11 marekdeb kernel: [   38.113810]  [<c035118d>] ? radix_tree_lookup_slot+0xd/0x10
Jul 16 13:50:11 marekdeb kernel: [   38.113815]  [<c01dc398>] ? find_get_page+0x28/0x80
Jul 16 13:50:11 marekdeb kernel: [   38.113819]  [<c022af73>] ? core_sys_select+0x183/0x2a0
Jul 16 13:50:11 marekdeb kernel: [   38.113825]  [<c01f5c38>] ? __do_fault+0x2d8/0x510
Jul 16 13:50:11 marekdeb kernel: [   38.113829]  [<c05c9829>] ? mutex_lock+0x19/0x40
Jul 16 13:50:11 marekdeb kernel: [   38.113834]  [<c0357143>] ? copy_to_user+0x43/0x60
Jul 16 13:50:11 marekdeb kernel: [   38.113838]  [<c03de9c8>] ? tty_mode_ioctl+0xa8/0x430
Jul 16 13:50:11 marekdeb kernel: [   38.113842]  [<c01f5fb5>] ? do_linear_fault+0x85/0xa0
Jul 16 13:50:11 marekdeb kernel: [   38.113846]  [<c03ded8f>] ? n_tty_ioctl_helper+0x3f/0x180
Jul 16 13:50:11 marekdeb kernel: [   38.113850]  [<c03dc010>] ? n_tty_ioctl+0x0/0xa0
Jul 16 13:50:11 marekdeb kernel: [   38.113854]  [<c03df3ad>] ? tty_ldisc_deref+0xd/0x10
Jul 16 13:50:11 marekdeb kernel: [   38.113858]  [<c03da26b>] ? tty_ioctl+0x12b/0x320
Jul 16 13:50:11 marekdeb kernel: [   38.113862]  [<c03da140>] ? tty_ioctl+0x0/0x320
Jul 16 13:50:11 marekdeb kernel: [   38.113866]  [<c022b271>] ? sys_select+0x31/0xb0
Jul 16 13:50:11 marekdeb kernel: [   38.113871]  [<c0102d23>] ? sysenter_do_call+0x12/0x28
Jul 16 13:50:11 marekdeb kernel: [   38.113874] Code: 24 8b 74 24 04 89 ec 5d c3 8d b4 26 00 00 00 00 55 89 e5 83 ec 08 89 1c 24 89 74 24 04 0f 1f 44 00 00 89 c3 e8 47 f8 ff ff 89 d8 <3e> ff 08 79 05 e8 1b 02 00 00 89 e0 8b 74 24 04 25 00 e0 ff ff
Jul 16 13:50:11 marekdeb kernel: [   38.113907] EIP: [<c05c982b>] mutex_lock+0x1b/0x40 SS:ESP 0068:e7eb5af4
Jul 16 13:50:11 marekdeb kernel: [   38.113912] CR2: 00000000000000bc
Jul 16 13:50:11 marekdeb kernel: [   38.113916] ---[ end trace 9aa224fa6aebffd3 ]---
Jul 16 13:50:11 marekdeb kernel: [   38.114219] Warning: dev (noz0) tty->count(0) != #fd's(1) in tty_release_dev
Jul 16 13:50:11 marekdeb kernel: [   38.114224] tty_release_dev: bad tty->count (-1) for noz0

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Can't open device /dev/noz0
https://bugs.launchpad.net/bugs/580334
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