Here is a backtrace from crash:
KERNEL: kernel_link
DUMPFILE: dump.201301181214 [PARTIAL DUMP]
CPUS: 4
DATE: Fri Jan 18 12:14:12 2013
UPTIME: 00:00:37
LOAD AVERAGE: 0.76, 0.19, 0.06
TASKS: 341
NODENAME: ubuntu-ThinkPad-X220
RELEASE: 3.2.0-35-generic
VERSION: #55-Ubuntu SMP Wed Dec 5 17:42:16 UTC 2012
MACHINE: x86_64 (2491 Mhz)
MEMORY: 3.9 GB
PANIC: "[ 37.128952] Oops: 0000 [#1] SMP " (check log for details)
PID: 1895
COMMAND: "zeitgeist-fts"
TASK: ffff880106072e00 [THREAD_INFO: ffff8800c81d2000]
CPU: 0
STATE: TASK_RUNNING (PANIC)
crash> bt
PID: 1895 TASK: ffff880106072e00 CPU: 0 COMMAND: "zeitgeist-fts"
#0 [ffff88011e2038c0] machine_kexec at ffffffff8103947a
#1 [ffff88011e203930] crash_kexec at ffffffff810b52c8
#2 [ffff88011e203a00] oops_end at ffffffff8165e168
#3 [ffff88011e203a30] no_context at ffffffff816431ce
#4 [ffff88011e203a70] __bad_area_nosemaphore at ffffffff816433a4
#5 [ffff88011e203ad0] bad_area_nosemaphore at ffffffff816433d6
#6 [ffff88011e203ae0] do_page_fault at ffffffff81660da6
#7 [ffff88011e203bf0] page_fault at ffffffff8165d735
[exception RIP: snd_complete_urb+107]
RIP: ffffffffa03f041b RSP: ffff88011e203ca8 RFLAGS: 00010002
RAX: 0000000000000000 RBX: ffff8801137332b8 RCX: 0000000000000002
RDX: ffff8800ce171900 RSI: ffff8800ce171900 RDI: ffff8800ce171900
RBP: ffff88011e203cd8 R8: 0000000000000206 R9: 0000000000000000
R10: 0000000002552620 R11: 0000000000000000 R12: ffff880113733358
R13: 0000000000000000 R14: ffff8800ce171900 R15: 0000000000000000
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0000
#8 [ffff88011e203ce0] usb_hcd_giveback_urb at ffffffff814940e4
#9 [ffff88011e203d10] ehci_urb_done at ffffffff814ac0a0
#10 [ffff88011e203d50] sitd_complete at ffffffff814ad0ab
#11 [ffff88011e203d80] scan_periodic at ffffffff814ad536
#12 [ffff88011e203e10] ehci_work at ffffffff814ad7c9
#13 [ffff88011e203e30] ehci_irq at ffffffff814adaa1
#14 [ffff88011e203e90] usb_hcd_irq at ffffffff814937ed
#15 [ffff88011e203eb0] handle_irq_event_percpu at ffffffff810d9dc5
#16 [ffff88011e203f10] handle_irq_event at ffffffff810d9fd1
#17 [ffff88011e203f40] handle_fasteoi_irq at ffffffff810dcffa
#18 [ffff88011e203f60] handle_irq at ffffffff81016282
#19 [ffff88011e203f80] do_IRQ at ffffffff816680da
--- <IRQ stack> ---
#20 [ffff8800c81d3f50] ret_from_intr at ffffffff8165d46e
RIP: ffffffffffffff9e RSP: 0000000000000206 RFLAGS: 00000033
RAX: 000000000255fc70 RBX: 0000000000000000 RCX: 00000000025683f0
RDX: 00007fff27884d90 RSI: 0000000002569470 RDI: 00007f028050a730
RBP: 0000000000000001 R8: 0000000000000767 R9: 0000000002552620
R10: 0000000000000000 R11: ffffffff816655c2 R12: 00000000025bda70
R13: 0000000002557940 R14: 00007fff27884c18 R15: 000000010256c220
ORIG_RAX: 00007f02740080a0 CS: 7f0280515551 SS: 7fff27884d20
bt: WARNING: possibly bogus exception frame
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https://bugs.launchpad.net/bugs/1097396
Title:
Unplugging USB Headset causes Kernel Panic
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