USB 3G modem causes system crash - WARNING: at include/linux/kref.h:42 usb_get_urb+0x40/0x48()
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
Raspbian |
New
|
Undecided
|
Unassigned |
Bug Description
USB 3G modem with active PPP connection ocassionally causes system crash with following message in /var/log/messages:
Oct 5 13:20:46 linux kernel: [83312.629525] ------------[ cut here ]------------
Oct 5 13:20:46 linux kernel: [83312.629598] WARNING: at include/
Oct 5 13:20:46 linux kernel: [83312.629636] Modules linked in: ppp_deflate zlib_deflate zlib_inflate bsd_comp ppp_async crc_ccitt ppp_generic slhc w1_therm w1_gpio wire cn snd_bcm2835 snd_pcm snd_seq snd_timer snd_seq_device snd snd_page_alloc sr_mod cdrom option usb_wwan cdc_ncm usbserial leds_gpio led_class
Oct 5 13:20:46 linux kernel: [83312.629789] [<c0013a7c>] (unwind_
Oct 5 13:20:46 linux kernel: [83312.629818] [<c001e2b4>] (warn_slowpath_
Oct 5 13:20:46 linux kernel: [83312.629863] [<c001e2e8>] (warn_slowpath_
Oct 5 13:20:46 linux kernel: [83312.629894] [<c027473c>] (usb_get_
Oct 5 13:20:46 linux kernel: [83312.629950] [<c02732a8>] (usb_hcd_
Oct 5 13:20:46 linux kernel: [83312.630066] [<bf02cb44>] (usb_wwan_
Oct 5 13:20:46 linux kernel: [83312.630155] [<bf0084cc>] (serial_
Oct 5 13:20:46 linux kernel: [83312.630208] [<bf12410c>] (ppp_async_
Oct 5 13:20:46 linux kernel: [83312.630275] [<bf1244e8>] (ppp_async_
Oct 5 13:20:46 linux kernel: [83312.630307] [<c0025710>] (tasklet_
Oct 5 13:20:46 linux kernel: [83312.630334] [<c0025840>] (__do_softirq+
Oct 5 13:20:46 linux kernel: [83312.630383] [<c0025d08>] (irq_exit+
Oct 5 13:20:46 linux kernel: [8Oct 5 13:17:16 linux kernel: imklog 5.8.11, log source = /proc/kmsg started.
Sometimes the system runs without problem for 1 month, sometimes crashes after 1 day.
Used USB modem: Huawei E303
Linux version: Linux linux 3.6.11+ #474 PREEMPT Thu Jun 13 17:14:42 BST 2013 armv6l GNU/Linux
Thanks for help!
I started having this after the latest updates to Raspbian last week.
Hardware:
Device : /dev/ttyUSB0
Manufacturer : Huawei
Model : E220 (E220)
Firmware : 11.117.09.00.00