pfSense

I had two kernel panics in the past 20 hours after upgrading to a newer 2.3.1 version (2.3.1.a.20160506.0040). Stack traces look slightly similar:

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address = 0x0
fault code = supervisor read data, page not present
instruction pointer = 0x20:0xffffffff80d22566
stack pointer = 0x28:0xfffffe001a38c590
frame pointer = 0x28:0xfffffe001a38c770
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 (irq260: igb2:que 0)
version.txt06000025412713111367 7616 ustarrootwheelFreeBSD 10.3-RELEASE #31 01118b4(RELENG_2_3): Thu Apr 28 03:57:55 CDT 2016
root@ce23-amd64-builder:/builder/pfsense/tmp/obj/builder/pfsense/tmp/FreeBSD-src/sys/pfSense

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address = 0x10
fault code = supervisor read data, page not present
instruction pointer = 0x20:0xffffffff80bf7604
stack pointer = 0x28:0xfffffe00458f8310
frame pointer = 0x28:0xfffffe00458f8330
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 = 68724 (pfctl)
version.txt06000025712713164773 7632 ustarrootwheelFreeBSD 10.3-RELEASE-p2 #50 3938f6f(RELENG_2_3): Fri May 6 01:18:07 CDT 2016
root@ce23-amd64-builder:/builder/pfsense/tmp/obj/builder/pfsense/tmp/FreeBSD-src/sys/pfSense

system freezes completly. No keyboard on the serial console is accepted. Only power down/up helps.