Today I got a crash from a NetBSD 2.0 kernel. Unfortunatly, I didn't
enabled DEBUG and -g when I built it, so the information here is
probably useless anyhow...

But here here is the backtrace and the panic message:

$ uname -v
NetBSD 2.0 (PHEISAR) #3: Mon Nov 29 23:03:22 WET 2004  root@proton.fnop.lan:/usr/obj/sys/arch/i386/compile/PHEISAR

Nov 30 23:42:31 proton savecore: reboot after panic: panic: kernel diagnostic assertion "to_ticks >= 0" failed: file "/usr/src/sys/kern/kern_timeout.c", line 281

gdb> target kcore /var/crash/netbsd.0.core
panic: kernel %sassertion "%s" failed: file "%s", line %d
#0  0xc0532000 in ?? ()
gdb> bt
#0  0xc0532000 in ?? ()
#1  0xc02df0b8 in cpu_reboot ()
#2  0xc026f3c9 in panic ()
#3  0xc036fe3e in __assert ()
#4  0xc026744f in callout_schedule ()
#5  0xc012a59f in tcp_output ()
#6  0xc012ec0e in tcp_usrreq ()
#7  0xc0286ff3 in sosend ()
#8  0xc028b738 in sendit ()
#9  0xc028b4e5 in sys_sendto ()
#10 0xc02e81a5 in syscall_plain ()
gdb> 

And the process list:
$ ps ax -M netbsd.0.core         
  PID TT STAT    TIME COMMAND
    0 ?? RWKs 0:00.00 [swapper]
    1 ?? RWs  0:00.00 init 
    2 ?? RWK  0:00.00 [cryptoret]
    3 ?? RWK  0:00.00 [sysmon]
    4 ?? RWK  0:00.00 [atabus0]
    5 ?? RWK  0:00.00 [atabus1]
    6 ?? RWK  0:00.00 [usb0]
    7 ?? RWK  0:00.00 [usbtask]
    8 ?? RWK  0:00.00 [usb1]
    9 ?? RWK  0:00.00 [pms0]
   10 ?? RWK  0:00.00 [atapibus0]
   11 ?? RWK  0:00.00 [pagedaemon]
   12 ?? RWK  0:01.00 [ioflush]
   13 ?? RWK  0:00.00 [aiodoned]
  105 ?? RWs  0:13.00 (powerd)
  249 ?? RWK  0:00.00 [nfsio]
  292 ?? RW   0:01.00 (xbindkeys)
  311 ?? RWK  0:00.00 [nfsio]
  314 ?? RWK  0:00.00 [nfsio]
  315 ?? RWK  0:00.00 [nfsio]
  344 ?? RWs  0:00.00 (mountd)
  402 ?? RWs  0:00.00 /usr/sbin/syslogd -s 
  431 ?? RWs  0:00.00 (dhclient)
  504 ?? RWs  0:13.00 (inetd)
  543 ?? RWs  0:00.00 (rpcbind)
  606 ?? RWs  0:04.00 /usr/sbin/mountd (nfsd)
  630 ?? RWL  0:04.00 nfsd: server 
  655 ?? RWs  0:00.00 (xclock)
  660 ?? RWL  0:04.00 (nfsd)
  693 ?? RWL  0:04.00 (nfsd)
  703 ?? RWs  0:00.00 (cron)
  721 ?? RWL  0:04.00 (nfsd)
  851 ?? RWs  0:13.00 X :0 -nolisten tcp (lpd)
  925 ?? RWs  0:00.00 sendmail: accepting connections 
  947 ?? RWs  0:00.00 (screenblank)
 1072 ?? RW   0:00.00 (XFree86)
 1084 ?? RWs  0:00.00 (ssh-agent)
 3242 ?? RWa  0:00.00 (firefox-bin)
 4454 ?? RW   0:00.00 (sh)
 4546 ?? RWs  0:00.00 (rxvt)
 5672 ?? RWs  0:00.00 (rxvt)
 6631 ?? RWs  0:06.00 (ksh)
 7141 ?? RWsa 0:06.00 (amule)
 9968 ?? RW   0:31.00 (gaim)
14633 ?? RWa  0:00.00 (xmms)
19695 ?? RWs  0:00.00 (gaim)
29522 ?? RW   0:00.00 (gconfd-2)
20804 p0 RWs+ 0:00.00 (mutt)
 2505 p1 RW+  0:30.00 (ksh)
 3965 p1 RWN+ 0:36.00 (FahCore_78.exe)
 4288 p1 RWN+ 0:00.00 (FahCore_78.exe)
 4641 p1 RW+  0:00.00 (FAH4Console-Linu)
 4707 p1 RW+  0:30.00 (FAH4Console-Linu)
 5118 p1 RWs  0:21.00 (ksh)
 5247 p1 RW+  0:00.00 (FAH4Console-Linu)
 5267 p1 RWN+ 0:00.00 (FahCore_78.exe)
 5361 p1 RW+  0:00.00 (FAH4Console-Linu)
 5392 p1 RW+  0:30.00 (FAH4Console-Linu)
 5428 p1 RWN+ 0:00.00 (FahCore_78.exe)
  235 E0 RW+  0:00.00 (sh)
  301 E0 RW   0:00.00 gaim (enlightenment)
  409 E0 RW   0:00.00 (sh)
  853 E0 RW+  0:00.00 (xinit)
  976 E0 RWs  0:00.00 (ksh)
  224 E1 RWs+ 0:04.00 /usr/libexec/getty Pc ttyE3 
  411 E2 RWs+ 0:04.00 (getty)
  225 E3 RWs+ 0:04.00 (getty)


Should I even try to do something else or this is just useless and I
should build a new kernel and wait for the bug to happen again ? 

        -- Rui Paulo <rpaulo@netbsd-pt.org>