unable to handle kernel NULL pointer dereference...



Hi!

After managing to make NM playing nicely with my Option Icon 225
usb-stick, I experienced few crashes yesterday and one of those are
captured in this log snippet:

-- BUG: unable to handle kernel NULL pointer dereference at 0000000000000020
IP: [<ffffffff802676e4>] debug_mutex_wake_waiter+0x44/0x160
PGD 4626a067 PUD 4626b067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP 
last sysfs file: /sys/devices/pci0000:00/0000:00:13.0/usb2/2-3/2-3:1.0/net/hso0/statistics/collisions
CPU 0 
Modules linked in: radeon drm ipv6 sco bridge stp llc bnep l2cap
bluetooth adm1021 hso rfkill usb_storage joydev serio_raw pcspkr psmouse
ohci1394 ssb pcmcia yenta_socket rsrc_nonstatic ieee1394 pcmcia_core wmi
container video output k8temp sg i2c_piix4 i2c_core shpchp pci_hotplug
evdev thermal fan snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device
button battery ac vboxdrv snd_atiixp snd_ac97_codec snd_pcm_oss snd_pcm
snd_timer snd_page_alloc snd_mixer_oss snd soundcore ac97_bus md_mod
cpufreq_ondemand powernow_k8 freq_table processor tg3 libphy rtc_cmos
rtc_core rtc_lib ext3 jbd mbcache dm_mod sr_mod cdrom ohci_hcd sd_mod
ehci_hcd usbcore ata_generic pata_atiixp libata scsi_mod

Pid: 5808, comm: NetworkManager Tainted: G   M       2.6.29-ARCH #1 HP Compaq nx6125 (PY417EA#AKN)  
RIP: 0010:[<ffffffff802676e4>]  [<ffffffff802676e4>] debug_mutex_wake_waiter+0x44/0x160
RSP: 0018:ffff88004620ddc8  EFLAGS: 00010017
RAX: ffff880043e6fc78 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff880043e6fc74
RBP: ffff880043e6fc70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 2222222222222222 R12: 0000000000000246
R13: 0000000000000000 R14: 0000000000000008 R15: 0000000000000000
FS:  00007f9926236740(0000) GS:ffffffff8067a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000020 CR3: 0000000046ba7000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process NetworkManager (pid: 5808, threadinfo ffff88004620c000, task ffff880046155200)
Stack:
 ffff880043e6f09c ffff880043e6fc70 ffff880043e6fc74 ffffffff804b2896
 ffffffff804b4775 ffff880046052800 0000000000000000 ffff88002cca6300
 ffff88002bebac08 ffffffff803c4812 0000000000000001 0000000000000000
Call Trace:
 [<ffffffff804b2896>] ? __mutex_unlock_slowpath+0x96/0x180
 [<ffffffff804b4775>] ? _spin_lock+0x15/0x20
 [<ffffffff803c4812>] ? tty_release_dev+0x162/0x5a0
 [<ffffffff8040cb6d>] ? sys_sendto+0x11d/0x180
 [<ffffffff802d9a7d>] ? vfs_ioctl+0x1d/0xb0
 [<ffffffff803c4c61>] ? tty_release+0x11/0x20
 [<ffffffff802cbcd2>] ? __fput+0xc2/0x210
 [<ffffffff802c859b>] ? filp_close+0x5b/0x90
 [<ffffffff802c8684>] ? sys_close+0xb4/0x120
 [<ffffffff8020c6aa>] ? system_call_fastpath+0x16/0x1b
Code: 89 fd 45 85 c9 75 36 48 8d 7f 04 e8 07 04 fc ff 90 85 c0 74 7c 44 8b 05 4b 97 42 00 45 85 c0 75 1c 48 8d 45 08 48 39 45 08 74 42 <48> 3b 5b 20 75 1b 48 3b 1b 0f 1f 00 0f 84 8f 00 00 00 48 8b 5c 
RIP  [<ffffffff802676e4>] debug_mutex_wake_waiter+0x44/0x160
 RSP <ffff88004620ddc8>
CR2: 0000000000000020
---[ end trace 80249a4d042672e9 ]---



Is it of any help to NM-devs?

Sincerely,
Gour

Attachment: pgp0WKCLzZW9a.pgp
Description: PGP signature



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