several crashes with -current

[Sebastian Stark <seb_(_at_)_todesplanet_(_dot_)_de>]

I've had this error several times now. I already completely replaced
memory so it's unlikely the cause. At some very varying intervals
(< 1 day) my box crashes, always showing the same error in ddb. It's
-current from the June 25 snapshot. I'm continuously upgrading this
system since 2.7 and I've never had problems before.

What is the problem now?

Sorry, this was all written down by hand:


kernel: page fault trap, code=0
Stopped at	_udp_check_ipsec+0x95: testb $0x2,0x6(%eax)
ddb> trace
_udp_check_ipsec(e0781000,e05bbbe4,44000210,0,0,0,148,0,e46d2af8,1c,e0781000,e0,7cb012) at _udp_check_ipsec+0x95
_udp_input(e0781000,14,0,0,e0781000) at _udp_input+0x5d6
_ipv4_input(e0781000,1f,e070cd40,e46189c4) at _ipv4_input+0x733
_ipintr(10,10,e46189c4,e46189c4,e46d2de8) at _ipintr+0x8d
Bad frame pointer: 0xe46d2d5c
ddb> x
_udp_check_ipsec+0x95: 20640f6
ddb> ps
(I didn't type all the output of ps to avoid wrist cramps):
pppoe, delegated, kpasswdd, kadmind, kdc, ppp, mgetty, getty, getty,
getty, getty, cron, iauth, ircd, sshd, sendmail, inetd, dhcpd, acct,
named, pflogd, syslogd, nfsio, nfsio, nfsio, nfsio, apm0, crypto,
aiodoned, update, cleaner, reaper, pagedaemon, init, swapper


/etc/sysctl.conf:
net.inet.ip.forwarding=1	# 1=Permit forwarding (routing) of packets
vfs.nfs.iothreads=4		# number of nfsio kernel threads


dmesg:
OpenBSD 3.1-current (GENERIC) #238: Tue Jun 25 20:59:39 MDT 2002
    deraadt_(_at_)_i386_(_dot_)_openbsd_(_dot_)_org:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: F00F bug workaround installed
cpu0: Intel Pentium/MMX ("GenuineIntel" 586-class) 232 MHz
cpu0: FPU,V86,DE,PSE,TSC,MSR,MCE,CX8,MMX
real mem  = 33140736 (32364K)
avail mem = 25165824 (24576K)
using 430 buffers containing 1761280 bytes (1720K) of memory
mainbus0 (root)
bios0 at mainbus0: AT/286+(d4) BIOS, date 07/14/97, BIOS32 rev. 0 @ 0xfafc0
apm0 at bios0: Power Management spec V1.2
apm0: AC on, battery charge unknown
pcibios0 at bios0: rev. 2.1 @ 0xf0000/0xb484
pcibios0: PCI BIOS has 6 Interrupt Routing table entries
pcibios0: PCI Interrupt Router at 000:07:0 ("Intel 82371SB PCI-ISA" rev 0x00)
pcibios0: PCI bus #0 is the last bus
bios0: ROM list: 0xc0000/0x8000
pci0 at mainbus0 bus 0: configuration mode 1 (bios)
pchb0 at pci0 dev 0 function 0 "Intel 82437VX" rev 0x02
pcib0 at pci0 dev 7 function 0 "Intel 82371SB PCI-ISA" rev 0x01
pciide0 at pci0 dev 7 function 1 "Intel 82371SB IDE" rev 0x00: DMA, channel 0 wired to compatibility, channel 1 wired to compatibility
wd0 at pciide0 channel 0 drive 0: <IBM-DHEA-36481>
wd0: 16-sector PIO, LBA, 6197MB, 12592 cyl, 16 head, 63 sec, 12692736 sectors
wd0(pciide0:0:0): using PIO mode 4, DMA mode 2
atapiscsi0 at pciide0 channel 1 drive 0
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <SONY, CD-ROM CDU55E, 1.0u> SCSI0 5/cdrom removable
cd0(pciide0:1:0): using PIO mode 3
vga1 at pci0 dev 9 function 0 "S3 Trio32/64" rev 0x54
wsdisplay0 at vga1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
rl0 at pci0 dev 10 function 0 "Realtek 8139" rev 0x10: irq 10 address 00:e0:7d:74:94:f2
rlphy0 at rl0 phy 0: RTL internal phy
rl1 at pci0 dev 11 function 0 "Realtek 8139" rev 0x10: irq 9 address 00:30:84:26:23:35
rlphy1 at rl1 phy 0: RTL internal phy
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
sysbeep0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
npx0 at isa0 port 0xf0/16: using exception 16
pccom0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
pccom1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
biomask c040 netmask c640 ttymask c6c2
pctr: 586-class performance counters and user-level cycle counter enabled
dkcsum: wd0 matched BIOS disk 80
root on wd0a
rootdev=0x0 rrootdev=0x300 rawdev=0x302
WARNING: / was not properly unmounted

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