Sudden reboot

[Jan Danielsson <jan.m.danielsson%gmail.com@localhost>]

Hello,

   I'm running netbsd-6 (a month old or so) on a Soekris net6501
(NetBSD/amd64), and tonight I had an unexpected reboot.
/var/log/messages contains:

Dec  3 03:15:46 aria syslogd[188]: restart
Dec  3 03:15:46 aria /netbsd: uvm_fault(0xffffffff8071b4d8, 0x0, 1) -> e
Dec  3 03:15:46 aria /netbsd: fatal page fault in supervisor mode
Dec  3 03:15:46 aria /netbsd: trap type 6 code 0 rip ffffffff8031162f cs
8 rflags 10283 cr2  60 cpl 4 rsp fffffe8004cf9b98
Dec  3 03:15:46 aria /netbsd: panic: trap
Dec  3 03:15:46 aria /netbsd: cpu1: Begin traceback...

   Thinking back, I recall noticing that I have had unexpected reboots
once or twice before, but it's very rare -- been running this system for
a year or so.

   The entry before syslogd restarting is simply a dhcp client renewal
(againt my ISP), which occured 03:14:04.

   Trap 6 = illegal op-code? Should I start worrying about broken RAM
modules?

   /Jan