Hi all,

Over the last weekend, I saw a couple of crashes on a 10.3-system acting
as filtering bridge with pf that all looked like this:

Unread portion of the kernel message buffer:

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0xe
fault code              = supervisor write data, page not present
instruction pointer     = 0x20:0xffffffff81c45fb9
stack pointer           = 0x28:0xfffffe01eeaa54a0
frame pointer           = 0x28:0xfffffe01eeaa55d0
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 (irq275: igb2:que 0)
trap number             = 12
panic: page fault
cpuid = 0
KDB: stack backtrace:
#0 0xffffffff8098e390 at kdb_backtrace+0x60
#1 0xffffffff80951066 at vpanic+0x126
#2 0xffffffff80950f33 at panic+0x43
#3 0xffffffff80d55f7b at trap_fatal+0x36b
#4 0xffffffff80d5627d at trap_pfault+0x2ed
#5 0xffffffff80d558fa at trap+0x47a
#6 0xffffffff80d3b8d2 at calltrap+0x8
#7 0xffffffff81c2c4c8 at pf_test+0x1c8
#8 0xffffffff81c3e07d at pf_check_in+0x1d
#9 0xffffffff80a24ef4 at pfil_run_hooks+0x84
#10 0xffffffff81c148e3 at bridge_pfil+0x363
#11 0xffffffff81c153a5 at bridge_forward+0x1c5
#12 0xffffffff81c13c55 at bridge_input+0x555
#13 0xffffffff80a1c05a at ether_nh_input+0x2ba
#14 0xffffffff80a24092 at netisr_dispatch_src+0x62
#15 0xffffffff804f859c at igb_rxeof+0x60c
#16 0xffffffff804f8c41 at igb_msix_que+0x121
#17 0xffffffff8091c99b at intr_event_execute_handlers+0xab

Before that happening, the system was fine for about 6 months. Over the weekend 
I saw about 10 identical crashes and subsequent reboots like this (with 
sometimes only a few minutes of operation between).
Running out of other ideas, I updated the system to latest release (-p7), and 
up to now it didn't happen again.

Any ideas what might be causing this?

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