Panic after upgrade 7.2 -> 7.3

Hi.

Just after upgrade from 7.2-p5 to 7.3-p1 I've got periodic panics on my 
router (after about a hour uptime).

Unread portion of the kernel message buffer:


Fatal trap 12: page fault while in kernel mode
cpuid = 2; apic id = 06
fault virtual address   = 0xc
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc05994ca
stack pointer           = 0x28:0xc4e49a00
frame pointer           = 0x28:0xc4e49a2c
code segment            = base 0x0, limit 0xfffff, type 0x1b
                         = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 27 (irq25: bge0)
trap number             = 12
panic: page fault
cpuid = 2
Uptime: 1h5m37s
Physical memory: 2039 MB
Dumping 180 MB: 165 149bge0: watchdog timeout -- resetting

Backtrace:
#0  doadump () at pcpu.h:196
#1  0xc054829f in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:418
#2  0xc0548564 in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:574
#3  0xc070be40 in trap_fatal (frame=0xc4e499c0, eva=12)
     at /usr/src/sys/i386/i386/trap.c:950
#4  0xc070c090 in trap_pfault (frame=0xc4e499c0, usermode=0, eva=12)
     at /usr/src/sys/i386/i386/trap.c:863
#5  0xc070ca1a in trap (frame=0xc4e499c0) at 
/usr/src/sys/i386/i386/trap.c:541
#6  0xc06f153b in calltrap () at /usr/src/sys/i386/i386/exception.s:166
#7  0xc05994ca in m_copym (m=0x0, off0=1500, len=1480, wait=1)
     at /usr/src/sys/kern/uipc_mbuf.c:539
#8  0xc0609430 in ip_fragment (ip=0xc57dc010, m_frag=0xc4e49afc, mtu=1500,
     if_hwassist_flags=7, sw_csum=3840) at 
/usr/src/sys/netinet/ip_output.c:731
#9  0xc060a0ec in ip_output (m=0xc57ab300, opt=0x0, ro=0xc4e49b34, flags=1,
     imo=0x0, inp=0x0) at /usr/src/sys/netinet/ip_output.c:570
#10 0xc0606fba in ip_forward (m=0xc57ab300, srcrt=0)
     at /usr/src/sys/netinet/ip_input.c:1366
#11 0xc0608533 in ip_input (m=0xc57ab300)
     at /usr/src/sys/netinet/ip_input.c:609
#12 0xc05e8fe9 in netisr_dispatch (num=2, m=0xc57ab300)
     at /usr/src/sys/net/netisr.c:185
#13 0xc05e34c9 in ether_demux (ifp=0xc517c000, m=0xc57ab300)
     at /usr/src/sys/net/if_ethersubr.c:834
#14 0xc05e389d in ether_input (ifp=0xc517c000, m=0xc57ab300)
     at /usr/src/sys/net/if_ethersubr.c:692
#15 0xc05e3428 in ether_demux (ifp=0xc5194c00, m=0xc57ab300)
     at /usr/src/sys/net/if_ethersubr.c:743
#16 0xc05e389d in ether_input (ifp=0xc5194c00, m=0xc57ab300)
     at /usr/src/sys/net/if_ethersubr.c:692
#17 0xc0478357 in bge_rxeof (sc=0xc5197000, rx_prod=295, holdlck=1)
     at /usr/src/sys/dev/bge/if_bge.c:3392
#18 0xc047a2db in bge_intr (xsc=0xc5197000)
     at /usr/src/sys/dev/bge/if_bge.c:3653
#19 0xc05265d8 in ithread_loop (arg=0xc518cbf0)
     at /usr/src/sys/kern/kern_intr.c:1181
#20 0xc0522eb1 in fork_exit (callout=0xc052643b <ithread_loop>,
     arg=0xc518cbf0, frame=0xc4e49d38) at /usr/src/sys/kern/kern_fork.c:811

FreeBSD xxx.xxx.xx 7.3-RELEASE-p1 FreeBSD 7.3-RELEASE-p1 #11: Thu May 27 
18:10:35 MSD 2010     root_at_xxx.xxx.xx:/usr/obj/usr/src/sys/ROUTER  i386

Any ideas?

-- 
Sem.