I got this crash (twice) on 2.6.4 with IRDA dongle; the driver does a lot
link/unlink and this is an SMP box, so this looks like a race.
SMP
CPU: 0
EIP: 0060:[<f8ba7d4e>] Not tainted
EFLAGS: 00210086 (2.6.4-tcp)
EIP is at urb_free_priv+0xe/0x40 [ohci_hcd]
eax: f5f5d800 ebx: e7b5c800 ecx: 00000000 edx: 00000000
esi: 00000000 edi: f5f5d800 ebp: c89e9d24 esp: c89e9d14
ds: 007b es: 007b ss: 0068
Process bk (pid: 4240, threadinfo=c89e8000 task=c48a3210)
Stack: f5f5d800 e7b5c800 eb4d9e40 f5f5d800 c89e9d3c f8ba7d9e 00000000 00000001
eb4d9e40 e7b5c800 c89e9da4 f8ba832c 00000001 00000003 d86e42d0 00200286
e58e0a80 c89e9d6c 00200286 00200002 f4c9f080 f4a6ee80 00000003 00000000
Call Trace:
[<f8ba7d9e>] finish_urb+0x1e/0xf3 [ohci_hcd]
[<f8ba832c>] ohci_urb_enqueue+0x409/0x7ec [ohci_hcd]
[<f8c7975e>] hcd_submit_urb+0x15d/0x6f3 [usbcore]
[<f8bb2461>] irlap_state_query+0xb7/0x19e [irda]
[<f8bb4fe7>] irlap_slot_timer_expired+0x0/0x2a [irda]
[<f8bb500f>] irlap_slot_timer_expired+0x28/0x2a [irda]
[<c0122381>] run_timer_softirq+0xc1/0x15e
[<c01184b9>] scheduler_tick+0x3b/0x5fc
[<c01123f1>] smp_apic_timer_interrupt+0xe3/0x152
[<f8c7aa68>] usb_submit_urb+0x208/0x26c [usbcore]
[<f8ba30bc>] stir_rcv_irq+0x16c/0x3c2 [stir4200]
[<f8c7950d>] usb_hcd_giveback_urb+0x1f/0x30 [usbcore]
[<f8ba7de6>] finish_urb+0x66/0xf3 [ohci_hcd]
[<f8ba8e5e>] ohci_irq+0x51b/0x5b4 [ohci_hcd]
[<c0114bf4>] do_page_fault+0x167/0x52b
[<f8c79f95>] usb_hcd_irq+0x31/0x60 [usbcore]
[<c0108f48>] handle_IRQ_event+0x33/0x59
[<c0108ffb>] do_IRQ+0x8d/0x195
[<c01071e8>] common_interrupt+0x18/0x20
Code: 0f b7 42 04 89 c7 83 ef 01 78 19 31 db 8b 54 9e 08 85 d2 74
<0>Kernel panic: Fatal exception in interrupt
In interrupt handler - not syncing
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