Panic in iwn on 9-stable

Andreas Nilsson andrnils at
Sat Jun 30 19:26:46 UTC 2012

I've had multiple panics recently (been trying it out on my laptop)  on
9-stable from the iwn driver.

It reports "FreeBSD 9.0-STABLE #0: Mon Jun 18 12:05:24 CEST 2012" and is a
lenovo t510 with 8gb ram, and the wlan card is

iwn0 at pci0:3:0:0:        class=0x028000 card=0x11118086 chip=0x42388086
rev=0x35 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Centrino Ultimate-N 6300'
    class      = network

In /var/crash/ I find
bowmore dumped core - see /var/crash/vmcore.2

Sat Jun 30 18:25:14 CEST 2012

FreeBSD bowmore 9.0-STABLE FreeBSD 9.0-STABLE #0: Mon Jun 18 12:05:24 CEST
2012     root at bowmore:/usr/obj/usr/src/sys/GENERIC  amd64

panic: page fault

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Unread portion of the kernel message buffer:

Fatal trap 12: page fault while in kernel mode
cpuid = 2; apic id = 04
fault virtual address   = 0x1e
fault code              = supervisor read data, page not present
instruction pointer     = 0x20:0xffffffff8056067a
stack pointer           = 0x28:0xffffff8226ced930
frame pointer           = 0x28:0xffffff8226ced990
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 12 (irq266: iwn0)
trap number             = 12
panic: page fault
cpuid = 2
KDB: stack backtrace:
#0 0xffffffff80918ad6 at kdb_backtrace+0x66
#1 0xffffffff808e2bbd at panic+0x1cd
#2 0xffffffff80bcf4f0 at trap_fatal+0x290
#3 0xffffffff80bcf82d at trap_pfault+0x1ed
#4 0xffffffff80bcfe4e at trap+0x3ce
#5 0xffffffff80bbaabf at calltrap+0x8
#6 0xffffffff8056638d at iwn_notif_intr+0x39d
#7 0xffffffff8056862b at iwn_intr+0x30b
#8 0xffffffff808b6d64 at intr_event_execute_handlers+0x104
#9 0xffffffff808b84f6 at ithread_loop+0xa6
#10 0xffffffff808b3e8f at fork_exit+0x11f
#11 0xffffffff80bbafee at fork_trampoline+0xe

Is this a known problem? Any more info I can provide?

Best regards
Andreas Nilsson

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