Crash in at_gprs_context_remove()

Hi,

I was testing my huawei disconnect patch on top of commit ca41d63a305c. Basically I was just connecting and disconnecting in a row from connman and ofono crashed:

Entering new phase: 0
ofonod[2365]: drivers/atmodem/gprs-context.c:ppp_disconnect() ofonod[2365]: Pcui:< \r\n^BOOT:38645652,0,0,0,87\r\n ofonod[2365]: Modem:> AT+CGDCONT=1,"IP","internet"\r ofonod[2365]: plugins/huawei.c:huawei_disconnect() ofonod[2365]: src/gprs.c:gprs_context_remove() atom: 0x6e4460 ofonod[2365]: drivers/atmodem/gprs-context.c:at_gprs_context_remove()

Program received signal SIGSEGV, Segmentation fault. 0x00007ffff790b642 in IA__g_atomic_int_exchange_and_add (atomic=0x0, val=-1)

    at /build/buildd/glib2.0-2.25.8/glib/gatomic-gcc.c:30
30      /build/buildd/glib2.0-2.25.8/glib/gatomic-gcc.c: No such file or directory.
        in /build/buildd/glib2.0-2.25.8/glib/gatomic-gcc.c

(gdb)

(gdb) bt
#0 0x00007ffff790b642 in IA__g_atomic_int_exchange_and_add (atomic=0x0,

    val=-1) at /build/buildd/glib2.0-2.25.8/glib/gatomic-gcc.c:30

#1 0x00000000004325a3 in g_at_ppp_unref (ppp=0x0) at gatchat/gatppp.c:448 #2 0x0000000000448e12 in at_gprs_context_remove (gc=0x6e2f50)
at drivers/atmodem/gprs-context.c:260
#3 0x00000000004923c9 in gprs_context_remove (atom=0x6e4460)

    at src/gprs.c:1418
#4  0x000000000045eacd in __ofono_atom_free (atom=0x6e4460) at src/modem.c:319
#5  0x00000000004924e8 in ofono_gprs_context_remove (gc=0x6e2f50)
    at src/gprs.c:1459
#6  0x0000000000457b4d in huawei_disconnect (user_data=0x6ee010)
    at plugins/huawei.c:233

#7 0x0000000000427369 in io_disconnect (user_data=0x6e49a0)
at gatchat/gatchat.c:290
#8 0x000000000042a87a in read_watcher_destroy_notify (user_data=0x6ea760)
at gatchat/gatio.c:77
#9 0x00007ffff792f82e in g_source_callback_unref (
cb_data=<value optimized out>)
at /build/buildd/glib2.0-2.25.8/glib/gmain.c:1077
#10 0x00007ffff792fe65 in g_source_destroy_internal (source=0x6efdb0,

    context=0x6e1000, have_lock=1)
    at /build/buildd/glib2.0-2.25.8/glib/gmain.c:856
#11 0x00007ffff79302e3 in g_main_dispatch (context=0x6e1000)
---Type <return> to continue, or q <return> to quit---
    at /build/buildd/glib2.0-2.25.8/glib/gmain.c:2069
#12 IA__g_main_context_dispatch (context=0x6e1000)
    at /build/buildd/glib2.0-2.25.8/glib/gmain.c:2597

#13 0x00007ffff79341b8 in g_main_context_iterate (context=0x6e1000,
block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>)
at /build/buildd/glib2.0-2.25.8/glib/gmain.c:2675
#14 0x00007ffff79346c5 in IA__g_main_loop_run (loop=0x6e10e0)

    at /build/buildd/glib2.0-2.25.8/glib/gmain.c:2883

#15 0x000000000045db7d in main (argc=1, argv=0x7fffffffe668) at src/main.c:227 (gdb)

(gdb) info locals
is_zero = 0
(gdb) up
#2 0x0000000000448e12 in at_gprs_context_remove (gc=0x6e2f50)
at drivers/atmodem/gprs-context.c:260
260 g_at_ppp_unref(gcd->ppp);
(gdb) info locals
gcd = 0x6ee1d0
__FUNCTION__ = "at_gprs_context_remove"
(gdb) p *gc
$1 = {gprs = 0x0, pending = 0x6e43c0, driver = 0x6d80a0,
driver_data = 0x6ee1d0, atom = 0x6e4460}
(gdb) p *gcd
$2 = {chat = 0x6e49a0, active_context = 1,
username = '\000' <repeats 63 times>, password = '\000' <repeats 255 times>,

  ppp = 0x0, state = STATE_ENABLING, {
    down_cb = 0x48fc7f <pri_activate_callback>, 
    up_cb = 0x48fc7f <pri_activate_callback>}, cb_data = 0x6f0c00}

(gdb)

Kalle Valo

Hi Kalle,

As Denis has pointed out, we can add a check for gcd->ppp in at_gprs_context_remove() to avoid this crash.

When I tried to activate & deactivate context on my Huawei EM770W modem, I see kernel module usb_serial warning.

------------[ cut here ]------------
WARNING: at /build/buildd/linux-2.6.31/drivers/usb/serial/usb-serial.c:460 serial_ioctl+0x99/0xa0 [usbserial]()
Hardware name: 7661BL4
Modules linked in: tun option usbserial usb_storage hidp aes_i586 aes_generic ppdev binfmt_misc bridge stp bnep btusb joydev snd_hda_codec_analog pcmcia snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss arc4 snd_pcm ecb snd_seq_dummy uvcvideo videodev v4l1_compat snd_seq_oss yenta_socket rsrc_nonstatic ricoh_mmc pcmcia_core iwlagn iwlcore mac80211 sdhci_pci sdhci psmouse serio_raw snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device cfg80211 thinkpad_acpi led_class nvram snd soundcore snd_page_alloc heci(C) lp parport usbhid dm_raid45 xor fbcon tileblit font bitblit softcursor ohci1394 e1000e ieee1394 i915 drm i2c_algo_bit video output intel_agp agpgart
Pid: 5180, comm: ofonod Tainted: G         C 2.6.31-16-generic #53-Ubuntu
Call Trace:
 [<c014518d>] warn_slowpath_common+0x6d/0xa0
 [<fa3ab689>] ? serial_ioctl+0x99/0xa0 [usbserial]
 [<fa3ab689>] ? serial_ioctl+0x99/0xa0 [usbserial]
 [<c01451d5>] warn_slowpath_null+0x15/0x20
 [<fa3ab689>] serial_ioctl+0x99/0xa0 [usbserial]
 [<c0386414>] ? tty_buffer_flush+0x54/0xe0
 [<fa3ab5f0>] ? serial_ioctl+0x0/0xa0 [usbserial]
 [<c03801b7>] tty_ioctl+0x77/0x620
 [<c0380140>] ? tty_ioctl+0x0/0x620
 [<c01f518c>] vfs_ioctl+0x1c/0x90
 [<c01f0726>] ? putname+0x26/0x40
 [<c01f54b1>] do_vfs_ioctl+0x71/0x310
 [<c01f57af>] sys_ioctl+0x5f/0x80
 [<c01e5939>] ? sys_open+0x29/0x40
 [<c010336c>] syscall_call+0x7/0xb
---[ end trace ac231b55ebb1fdca ]---

When I shutdown the oFono, kernel reports:

	tty_port_close_start: tty->count = 1 port count = 0.

Any ideas?

Regards,
Zhenhua

Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466128] ------------[ cut here ]------------
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466152] WARNING: at /build/buildd/linux-2.6.31/drivers/usb/serial/usb-serial.c:460 serial_ioctl+0x99/0xa0 [usbserial]()
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466159] Hardware name: 7661BL4
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466163] Modules linked in: tun option usbserial usb_storage hidp aes_i586 aes_generic ppdev binfmt_misc bridge stp bnep btusb joydev snd_hda_codec_analog pcmcia snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss arc4 snd_pcm ecb snd_seq_dummy uvcvideo videodev v4l1_compat snd_seq_oss yenta_socket rsrc_nonstatic ricoh_mmc pcmcia_core iwlagn iwlcore mac80211 sdhci_pci sdhci psmouse serio_raw snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device cfg80211 thinkpad_acpi led_class nvram snd soundcore snd_page_alloc heci(C) lp parport usbhid dm_raid45 xor fbcon tileblit font bitblit softcursor ohci1394 e1000e ieee1394 i915 drm i2c_algo_bit video output intel_agp agpgart
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466309] Pid: 5180, comm: ofonod Tainted: G         C 2.6.31-16-generic #53-Ubuntu
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466315] Call Trace:
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466332]  [<c014518d>] warn_slowpath_common+0x6d/0xa0
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466347]  [<fa3ab689>] ? serial_ioctl+0x99/0xa0 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466361]  [<fa3ab689>] ? serial_ioctl+0x99/0xa0 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466371]  [<c01451d5>] warn_slowpath_null+0x15/0x20
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466384]  [<fa3ab689>] serial_ioctl+0x99/0xa0 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466394]  [<c0386414>] ? tty_buffer_flush+0x54/0xe0
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466408]  [<fa3ab5f0>] ? serial_ioctl+0x0/0xa0 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466416]  [<c03801b7>] tty_ioctl+0x77/0x620
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466424]  [<c0380140>] ? tty_ioctl+0x0/0x620
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466433]  [<c01f518c>] vfs_ioctl+0x1c/0x90
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466440]  [<c01f0726>] ? putname+0x26/0x40
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466448]  [<c01f54b1>] do_vfs_ioctl+0x71/0x310
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466456]  [<c01f57af>] sys_ioctl+0x5f/0x80
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466465]  [<c01e5939>] ? sys_open+0x29/0x40
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466473]  [<c010336c>] syscall_call+0x7/0xb
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466479] ---[ end trace ac231b55ebb1fdca ]---
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466489] ------------[ cut here ]------------
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466503] WARNING: at /build/buildd/linux-2.6.31/drivers/usb/serial/usb-serial.c:460 serial_ioctl+0x99/0xa0 [usbserial]()
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466509] Hardware name: 7661BL4
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466512] Modules linked in: tun option usbserial usb_storage hidp aes_i586 aes_generic ppdev binfmt_misc bridge stp bnep btusb joydev snd_hda_codec_analog pcmcia snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss arc4 snd_pcm ecb snd_seq_dummy uvcvideo videodev v4l1_compat snd_seq_oss yenta_socket rsrc_nonstatic ricoh_mmc pcmcia_core iwlagn iwlcore mac80211 sdhci_pci sdhci psmouse serio_raw snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device cfg80211 thinkpad_acpi led_class nvram snd soundcore snd_page_alloc heci(C) lp parport usbhid dm_raid45 xor fbcon tileblit font bitblit softcursor ohci1394 e1000e ieee1394 i915 drm i2c_algo_bit video output intel_agp agpgart
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466646] Pid: 5180, comm: ofonod Tainted: G        WC 2.6.31-16-generic #53-Ubuntu
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466651] Call Trace:
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466659]  [<c014518d>] warn_slowpath_common+0x6d/0xa0
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466673]  [<fa3ab689>] ? serial_ioctl+0x99/0xa0 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466687]  [<fa3ab689>] ? serial_ioctl+0x99/0xa0 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466696]  [<c01451d5>] warn_slowpath_null+0x15/0x20
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466710]  [<fa3ab689>] serial_ioctl+0x99/0xa0 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466723]  [<fa3ab5f0>] ? serial_ioctl+0x0/0xa0 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466731]  [<c03801b7>] tty_ioctl+0x77/0x620
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466739]  [<c0380140>] ? tty_ioctl+0x0/0x620
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466747]  [<c01f518c>] vfs_ioctl+0x1c/0x90
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466754]  [<c01f0726>] ? putname+0x26/0x40
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466761]  [<c01f54b1>] do_vfs_ioctl+0x71/0x310
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466770]  [<c01f57af>] sys_ioctl+0x5f/0x80
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466777]  [<c01e5939>] ? sys_open+0x29/0x40
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466785]  [<c010336c>] syscall_call+0x7/0xb
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466791] ---[ end trace ac231b55ebb1fdcb ]---
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466798] ------------[ cut here ]------------
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466811] WARNING: at /build/buildd/linux-2.6.31/drivers/usb/serial/usb-serial.c:460 serial_ioctl+0x99/0xa0 [usbserial]()
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466817] Hardware name: 7661BL4
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466821] Modules linked in: tun option usbserial usb_storage hidp aes_i586 aes_generic ppdev binfmt_misc bridge stp bnep btusb joydev snd_hda_codec_analog pcmcia snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss arc4 snd_pcm ecb snd_seq_dummy uvcvideo videodev v4l1_compat snd_seq_oss yenta_socket rsrc_nonstatic ricoh_mmc pcmcia_core iwlagn iwlcore mac80211 sdhci_pci sdhci psmouse serio_raw snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device cfg80211 thinkpad_acpi led_class nvram snd soundcore snd_page_alloc heci(C) lp parport usbhid dm_raid45 xor fbcon tileblit font bitblit softcursor ohci1394 e1000e ieee1394 i915 drm i2c_algo_bit video output intel_agp agpgart
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466953] Pid: 5180, comm: ofonod Tainted: G        WC 2.6.31-16-generic #53-Ubuntu
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466958] Call Trace:
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466967]  [<c014518d>] warn_slowpath_common+0x6d/0xa0
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466981]  [<fa3ab689>] ? serial_ioctl+0x99/0xa0 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.466994]  [<fa3ab689>] ? serial_ioctl+0x99/0xa0 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467003]  [<c01451d5>] warn_slowpath_null+0x15/0x20
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467017]  [<fa3ab689>] serial_ioctl+0x99/0xa0 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467031]  [<fa3ab5f0>] ? serial_ioctl+0x0/0xa0 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467038]  [<c03801b7>] tty_ioctl+0x77/0x620
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467046]  [<c0380140>] ? tty_ioctl+0x0/0x620
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467054]  [<c01f518c>] vfs_ioctl+0x1c/0x90
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467061]  [<c01f0726>] ? putname+0x26/0x40
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467069]  [<c01f54b1>] do_vfs_ioctl+0x71/0x310
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467077]  [<c01f57af>] sys_ioctl+0x5f/0x80
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467084]  [<c01e5939>] ? sys_open+0x29/0x40
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467092]  [<c010336c>] syscall_call+0x7/0xb
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467097] ---[ end trace ac231b55ebb1fdcc ]---
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467104] ------------[ cut here ]------------
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467117] WARNING: at /build/buildd/linux-2.6.31/drivers/usb/serial/usb-serial.c:476 serial_set_termios+0x6e/0xa0 [usbserial]()
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467124] Hardware name: 7661BL4
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467127] Modules linked in: tun option usbserial usb_storage hidp aes_i586 aes_generic ppdev binfmt_misc bridge stp bnep btusb joydev snd_hda_codec_analog pcmcia snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss arc4 snd_pcm ecb snd_seq_dummy uvcvideo videodev v4l1_compat snd_seq_oss yenta_socket rsrc_nonstatic ricoh_mmc pcmcia_core iwlagn iwlcore mac80211 sdhci_pci sdhci psmouse serio_raw snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device cfg80211 thinkpad_acpi led_class nvram snd soundcore snd_page_alloc heci(C) lp parport usbhid dm_raid45 xor fbcon tileblit font bitblit softcursor ohci1394 e1000e ieee1394 i915 drm i2c_algo_bit video output intel_agp agpgart
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467260] Pid: 5180, comm: ofonod Tainted: G        WC 2.6.31-16-generic #53-Ubuntu
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467264] Call Trace:
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467273]  [<c014518d>] warn_slowpath_common+0x6d/0xa0
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467287]  [<fa3aba8e>] ? serial_set_termios+0x6e/0xa0 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467301]  [<fa3aba8e>] ? serial_set_termios+0x6e/0xa0 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467310]  [<c01451d5>] warn_slowpath_null+0x15/0x20
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467324]  [<fa3aba8e>] serial_set_termios+0x6e/0xa0 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467332]  [<c0384779>] change_termios+0x169/0x2c0
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467341]  [<c0384ac8>] set_termios+0xd8/0x1d0
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467349]  [<c03850af>] tty_mode_ioctl+0x37f/0x4c0
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467358]  [<c010692a>] ? show_trace+0x1a/0x20
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467367]  [<c056ea7c>] ? printk+0x18/0x1c
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467376]  [<c0144f8a>] ? print_oops_end_marker+0x2a/0x30
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467385]  [<c014519f>] ? warn_slowpath_common+0x7f/0xa0
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467395]  [<c0127c38>] ? default_spin_lock_flags+0x8/0x10
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467403]  [<c0570e3a>] ? _spin_lock_irqsave+0x2a/0x40
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467412]  [<c0385225>] n_tty_ioctl_helper+0x35/0x180
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467419]  [<c038219e>] n_tty_ioctl+0x2e/0xe0
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467427]  [<c03801ee>] tty_ioctl+0xae/0x620
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467434]  [<c0382170>] ? n_tty_ioctl+0x0/0xe0
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467441]  [<c0380140>] ? tty_ioctl+0x0/0x620
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467449]  [<c01f518c>] vfs_ioctl+0x1c/0x90
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467457]  [<c01f0726>] ? putname+0x26/0x40
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467465]  [<c01f54b1>] do_vfs_ioctl+0x71/0x310
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467473]  [<c01f57af>] sys_ioctl+0x5f/0x80
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467481]  [<c01e5939>] ? sys_open+0x29/0x40
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467488]  [<c010336c>] syscall_call+0x7/0xb
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467494] ---[ end trace ac231b55ebb1fdcd ]---
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467872] ------------[ cut here ]------------
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467891] WARNING: at /build/buildd/linux-2.6.31/drivers/usb/serial/usb-serial.c:460 serial_ioctl+0x99/0xa0 [usbserial]()
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467898] Hardware name: 7661BL4
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.467902] Modules linked in: tun option usbserial usb_storage hidp aes_i586 aes_generic ppdev binfmt_misc bridge stp bnep btusb joydev snd_hda_codec_analog pcmcia snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss arc4 snd_pcm ecb snd_seq_dummy uvcvideo videodev v4l1_compat snd_seq_oss yenta_socket rsrc_nonstatic ricoh_mmc pcmcia_core iwlagn iwlcore mac80211 sdhci_pci sdhci psmouse serio_raw snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device cfg80211 thinkpad_acpi led_class nvram snd soundcore snd_page_alloc heci(C) lp parport usbhid dm_raid45 xor fbcon tileblit font bitblit softcursor ohci1394 e1000e ieee1394 i915 drm i2c_algo_bit video output intel_agp agpgart
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468054] Pid: 5180, comm: ofonod Tainted: G        WC 2.6.31-16-generic #53-Ubuntu
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468059] Call Trace:
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468071]  [<c014518d>] warn_slowpath_common+0x6d/0xa0
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468088]  [<fa3ab689>] ? serial_ioctl+0x99/0xa0 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468104]  [<fa3ab689>] ? serial_ioctl+0x99/0xa0 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468117]  [<c01451d5>] warn_slowpath_null+0x15/0x20
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468133]  [<fa3ab689>] serial_ioctl+0x99/0xa0 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468149]  [<fa3ab5f0>] ? serial_ioctl+0x0/0xa0 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468160]  [<c03801b7>] tty_ioctl+0x77/0x620
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468170]  [<c0380140>] ? tty_ioctl+0x0/0x620
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468181]  [<c01f518c>] vfs_ioctl+0x1c/0x90
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468191]  [<c01f0726>] ? putname+0x26/0x40
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468201]  [<c01f54b1>] do_vfs_ioctl+0x71/0x310
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468211]  [<c01f57af>] sys_ioctl+0x5f/0x80
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468221]  [<c01e5939>] ? sys_open+0x29/0x40
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468231]  [<c010336c>] syscall_call+0x7/0xb
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468240] ---[ end trace ac231b55ebb1fdce ]---
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468349] ------------[ cut here ]------------
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468368] WARNING: at /build/buildd/linux-2.6.31/drivers/usb/serial/usb-serial.c:412 serial_write_room+0x70/0x80 [usbserial]()
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468378] Hardware name: 7661BL4
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468383] Modules linked in: tun option usbserial usb_storage hidp aes_i586 aes_generic ppdev binfmt_misc bridge stp bnep btusb joydev snd_hda_codec_analog pcmcia snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss arc4 snd_pcm ecb snd_seq_dummy uvcvideo videodev v4l1_compat snd_seq_oss yenta_socket rsrc_nonstatic ricoh_mmc pcmcia_core iwlagn iwlcore mac80211 sdhci_pci sdhci psmouse serio_raw snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device cfg80211 thinkpad_acpi led_class nvram snd soundcore snd_page_alloc heci(C) lp parport usbhid dm_raid45 xor fbcon tileblit font bitblit softcursor ohci1394 e1000e ieee1394 i915 drm i2c_algo_bit video output intel_agp agpgart
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468600] Pid: 5180, comm: ofonod Tainted: G        WC 2.6.31-16-generic #53-Ubuntu
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468608] Call Trace:
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468620]  [<c014518d>] warn_slowpath_common+0x6d/0xa0
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468636]  [<fa3ab700>] ? serial_write_room+0x70/0x80 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468653]  [<fa3ab700>] ? serial_write_room+0x70/0x80 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468665]  [<c01451d5>] warn_slowpath_null+0x15/0x20
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468681]  [<fa3ab700>] serial_write_room+0x70/0x80 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468692]  [<c03840b8>] tty_write_room+0x18/0x20
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468702]  [<c0381e05>] n_tty_poll+0x135/0x150
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468713]  [<c037e121>] tty_poll+0x61/0x80
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468725]  [<c0496bd7>] ? datagram_poll+0x17/0xf0
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468734]  [<c0381cd0>] ? n_tty_poll+0x0/0x150
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468746]  [<c01f611b>] do_poll+0xcb/0x230
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468756]  [<c01f6c41>] do_sys_poll+0x131/0x1f0
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468766]  [<c01f6970>] ? __pollwait+0x0/0xd0
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468777]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468787]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468797]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468807]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468817]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468827]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468837]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468847]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468859]  [<c050e25d>] ? unix_stream_sendmsg+0x1dd/0x380
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468872]  [<c0482984>] ? aa_cred_policy+0x14/0x30
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468885]  [<c048da00>] ? sock_sendmsg+0xe0/0x110
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468897]  [<c012e890>] ? __wake_up_common+0x40/0x70
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468908]  [<c015c280>] ? autoremove_wake_function+0x0/0x40
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468920]  [<c0133080>] ? __wake_up+0x40/0x50
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468932]  [<c037f773>] ? tty_wakeup+0x33/0x70
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468942]  [<c03871a1>] ? pty_write+0x61/0x70
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468952]  [<c0570f18>] ? _spin_lock+0x8/0x10
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468963]  [<c01f3e7b>] ? fasync_helper+0xab/0x120
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468980]  [<fa3abaeb>] ? serial_close+0x2b/0xa0 [usbserial]
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.468991]  [<c037dfde>] ? tty_fasync+0x3e/0x120
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.469001]  [<c0570f18>] ? _spin_lock+0x8/0x10
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.469025]  [<c031210d>] ? kobject_put+0x1d/0x50
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.469037]  [<c01fdd7a>] ? mntput_no_expire+0x1a/0xd0
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.469049]  [<c01e91f2>] ? __fput+0x172/0x1f0
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.469060]  [<c01e9285>] ? fput+0x15/0x20
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.469070]  [<c01e56a7>] ? filp_close+0x47/0x70
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.469081]  [<c01f6e74>] sys_poll+0x54/0xb0
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.469090]  [<c01e5743>] ? sys_close+0x73/0xb0
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.469101]  [<c010336c>] syscall_call+0x7/0xb
Jul  1 13:07:26 zzhan17-mobile kernel: [11036.469108] ---[ end trace ac231b55ebb1fdcf ]---
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633131] ------------[ cut here ]------------
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633155] WARNING: at /build/buildd/linux-2.6.31/drivers/usb/serial/usb-serial.c:412 serial_write_room+0x70/0x80 [usbserial]()
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633162] Hardware name: 7661BL4
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633167] Modules linked in: tun option usbserial usb_storage hidp aes_i586 aes_generic ppdev binfmt_misc bridge stp bnep btusb joydev snd_hda_codec_analog pcmcia snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss arc4 snd_pcm ecb snd_seq_dummy uvcvideo videodev v4l1_compat snd_seq_oss yenta_socket rsrc_nonstatic ricoh_mmc pcmcia_core iwlagn iwlcore mac80211 sdhci_pci sdhci psmouse serio_raw snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device cfg80211 thinkpad_acpi led_class nvram snd soundcore snd_page_alloc heci(C) lp parport usbhid dm_raid45 xor fbcon tileblit font bitblit softcursor ohci1394 e1000e ieee1394 i915 drm i2c_algo_bit video output intel_agp agpgart
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633315] Pid: 5180, comm: ofonod Tainted: G        WC 2.6.31-16-generic #53-Ubuntu
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633321] Call Trace:
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633338]  [<c014518d>] warn_slowpath_common+0x6d/0xa0
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633353]  [<fa3ab700>] ? serial_write_room+0x70/0x80 [usbserial]
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633367]  [<fa3ab700>] ? serial_write_room+0x70/0x80 [usbserial]
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633377]  [<c01451d5>] warn_slowpath_null+0x15/0x20
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633390]  [<fa3ab700>] serial_write_room+0x70/0x80 [usbserial]
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633400]  [<c03840b8>] tty_write_room+0x18/0x20
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633408]  [<c0381e05>] n_tty_poll+0x135/0x150
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633418]  [<c037e121>] tty_poll+0x61/0x80
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633425]  [<c0381cd0>] ? n_tty_poll+0x0/0x150
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633435]  [<c01f611b>] do_poll+0xcb/0x230
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633444]  [<c01f6c41>] do_sys_poll+0x131/0x1f0
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633452]  [<c01f6970>] ? __pollwait+0x0/0xd0
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633460]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633468]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633476]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633483]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633491]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633498]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633506]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633514]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633524]  [<c050e25d>] ? unix_stream_sendmsg+0x1dd/0x380
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633534]  [<c0482984>] ? aa_cred_policy+0x14/0x30
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633545]  [<c048da00>] ? sock_sendmsg+0xe0/0x110
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633554]  [<c012e890>] ? __wake_up_common+0x40/0x70
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633563]  [<c015c280>] ? autoremove_wake_function+0x0/0x40
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633573]  [<c0133080>] ? __wake_up+0x40/0x50
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633582]  [<c037f773>] ? tty_wakeup+0x33/0x70
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633590]  [<c03871a1>] ? pty_write+0x61/0x70
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633599]  [<c0570f18>] ? _spin_lock+0x8/0x10
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633607]  [<c01f3e7b>] ? fasync_helper+0xab/0x120
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633622]  [<fa3abaeb>] ? serial_close+0x2b/0xa0 [usbserial]
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633630]  [<c037dfde>] ? tty_fasync+0x3e/0x120
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633638]  [<c0570f18>] ? _spin_lock+0x8/0x10
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633650]  [<c031210d>] ? kobject_put+0x1d/0x50
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633659]  [<c01fdd7a>] ? mntput_no_expire+0x1a/0xd0
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633669]  [<c01e91f2>] ? __fput+0x172/0x1f0
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633677]  [<c01e9285>] ? fput+0x15/0x20
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633684]  [<c01e56a7>] ? filp_close+0x47/0x70
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633692]  [<c01f6e74>] sys_poll+0x54/0xb0
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633700]  [<c01e5743>] ? sys_close+0x73/0xb0
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633708]  [<c010336c>] syscall_call+0x7/0xb
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633714] ---[ end trace ac231b55ebb1fdd0 ]---
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633870] ------------[ cut here ]------------
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633886] WARNING: at /build/buildd/linux-2.6.31/drivers/usb/serial/usb-serial.c:412 serial_write_room+0x70/0x80 [usbserial]()
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633893] Hardware name: 7661BL4
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.633897] Modules linked in: tun option usbserial usb_storage hidp aes_i586 aes_generic ppdev binfmt_misc bridge stp bnep btusb joydev snd_hda_codec_analog pcmcia snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss arc4 snd_pcm ecb snd_seq_dummy uvcvideo videodev v4l1_compat snd_seq_oss yenta_socket rsrc_nonstatic ricoh_mmc pcmcia_core iwlagn iwlcore mac80211 sdhci_pci sdhci psmouse serio_raw snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device cfg80211 thinkpad_acpi led_class nvram snd soundcore snd_page_alloc heci(C) lp parport usbhid dm_raid45 xor fbcon tileblit font bitblit softcursor ohci1394 e1000e ieee1394 i915 drm i2c_algo_bit video output intel_agp agpgart
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634099] Pid: 5180, comm: ofonod Tainted: G        WC 2.6.31-16-generic #53-Ubuntu
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634108] Call Trace:
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634120]  [<c014518d>] warn_slowpath_common+0x6d/0xa0
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634137]  [<fa3ab700>] ? serial_write_room+0x70/0x80 [usbserial]
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634154]  [<fa3ab700>] ? serial_write_room+0x70/0x80 [usbserial]
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634167]  [<c01451d5>] warn_slowpath_null+0x15/0x20
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634183]  [<fa3ab700>] serial_write_room+0x70/0x80 [usbserial]
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634195]  [<c03840b8>] tty_write_room+0x18/0x20
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634205]  [<c0381e05>] n_tty_poll+0x135/0x150
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634216]  [<c037e121>] tty_poll+0x61/0x80
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634227]  [<c0496bd7>] ? datagram_poll+0x17/0xf0
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634237]  [<c0381cd0>] ? n_tty_poll+0x0/0x150
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634248]  [<c01f611b>] do_poll+0xcb/0x230
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634260]  [<c0127c38>] ? default_spin_lock_flags+0x8/0x10
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634271]  [<c0570e3a>] ? _spin_lock_irqsave+0x2a/0x40
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634283]  [<c01f6c41>] do_sys_poll+0x131/0x1f0
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634294]  [<c01f6970>] ? __pollwait+0x0/0xd0
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634304]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634314]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634324]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634334]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634345]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634355]  [<c01f6a40>] ? pollwake+0x0/0x60
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634367]  [<c0133007>] ? __wake_up_sync_key+0x47/0x60
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634379]  [<c0491299>] ? sock_def_readable+0x39/0x70
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634390]  [<c050e25d>] ? unix_stream_sendmsg+0x1dd/0x380
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634402]  [<c0482984>] ? aa_cred_policy+0x14/0x30
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634415]  [<c048da00>] ? sock_sendmsg+0xe0/0x110
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634426]  [<c012e890>] ? __wake_up_common+0x40/0x70
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634437]  [<c015c280>] ? autoremove_wake_function+0x0/0x40
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634448]  [<c0133080>] ? __wake_up+0x40/0x50
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634460]  [<c037f773>] ? tty_wakeup+0x33/0x70
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634471]  [<c03871a1>] ? pty_write+0x61/0x70
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634481]  [<c0127c38>] ? default_spin_lock_flags+0x8/0x10
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634493]  [<c0127c38>] ? default_spin_lock_flags+0x8/0x10
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634505]  [<c0570e3a>] ? _spin_lock_irqsave+0x2a/0x40
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634517]  [<c015c50c>] ? remove_wait_queue+0x3c/0x50
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634527]  [<c0382a7b>] ? n_tty_read+0x33b/0x720
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634540]  [<c0385688>] ? tty_ldisc_deref+0x8/0x10
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634551]  [<c037e245>] ? tty_read+0x85/0xb0
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634561]  [<c0382740>] ? n_tty_read+0x0/0x720
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634572]  [<c01e7d57>] ? vfs_read+0x97/0x190
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634583]  [<c037e1c0>] ? tty_read+0x0/0xb0
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634593]  [<c01f6e74>] sys_poll+0x54/0xb0
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634603]  [<c010336c>] syscall_call+0x7/0xb
Jul  1 13:07:43 zzhan17-mobile kernel: [11052.634611] ---[ end trace ac231b55ebb1fdd1 ]---
Jul  1 13:08:55 zzhan17-mobile kernel: [11125.331834] tty_port_close_start: tty->count = 1 port count = 0.

Hi,

I observed the warning shows up when /dev/ttyUSB2 send us any intermediate result. If I remove gprs atom and recreate it in huawei_disconnect, the kernel warning is gone. Does anyone see the same problem in other Huawei modem? If not, I assume it's a problem only for EM770 modem. (I don't have other Huawei modem at hand)

Thanks,
Zhenhua

Regards,
Zhenhua