5.3-BETA2 panic: no upcall owned

build: FreeBSD 5.3-BETA2 #11: Fri Aug 27 23:37:48 EDT 2004
kernel config: http://www.omut.org/~lxv/GENERIC-S
dmesg: http://www.omut.org/~lxv/dmesg.tadpole
debug.mpsafenet=1

The machine was running 'portupgrade openoffice', thunderbird, firefox.

panic messages:
---
panic: no upcall owned
cpuid = 1; 
KDB: stack backtrace:
kdb_backtrace(c06ba5cf,1,c06b8276,d65e6ce4,c1ea59a0) at kdb_backtrace+0x2e
panic(c06b8276,c07153a0,1,2827e95c,c) at panic+0x145
thread_user_enter(c2616a80,c1ea59a0,10b,804,bfaed6d4) at thread_user_enter+0x92
trap(2f,2f,2f,8082400,0) at trap+0x207
calltrap() at calltrap+0x5
--- trap 0xc, eip = 0x28265285, esp = 0xbfaed6b8, ebp = 0xbfaed710 ---
boot() called on cpu#1
Uptime: 15h17m39s
Dumping 383 MB
 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 256 272 288 304 320 336 352 368
---
#0  doadump () at pcpu.h:159
159             __asm __volatile("movl %%fs:0,%0" : "=r" (td));
doadump () at pcpu.h:159
159             __asm __volatile("movl %%fs:0,%0" : "=r" (td));
(kgdb) bt
#0  doadump () at pcpu.h:159
#1  0xc05221b2 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:396
#2  0xc05225a0 in panic (fmt=0xc06b8276 "no upcall owned") at /usr/src/sys/kern/kern_shutdown.c:558
#3  0xc050ebb2 in thread_user_enter (p=0xc2616a80, td=0xc1ea59a0) at /usr/src/sys/kern/kern_kse.c:1177
#4  0xc0679487 in trap (frame= {tf_fs = 47, tf_es = 47, tf_ds = 47, tf_edi = 134751232, tf_esi = 0, tf_ebp = -1079060720, tf_isp = -698454668, tf_ebx = 673704284, tf_edx = 0, tf_ecx = 673705028, tf_eax = 1811, tf_trapno = 12, tf_err = 7, tf_eip = 673600133, tf_cs = 31, tf_eflags = 66194, tf_esp = -1079060808, tf_ss = 47}) at /usr/src/sys/i386/i386/trap.c:314
#5  0xc066559a in calltrap () at /usr/src/sys/i386/i386/exception.s:140
#6  0x0000002f in ?? ()
#7  0x0000002f in ?? ()
#8  0x0000002f in ?? ()
#9  0x08082400 in ?? ()
#10 0x00000000 in ?? ()
#11 0xbfaed710 in ?? ()
#12 0xd65e6d74 in ?? ()
#13 0x2827e95c in ?? ()
#14 0x00000000 in ?? ()
#15 0x2827ec44 in ?? ()
#16 0x00000713 in ?? ()
#17 0x0000000c in ?? ()
#18 0x00000007 in ?? ()
#19 0x28265285 in ?? ()
#20 0x0000001f in ?? ()
#21 0x00010292 in ?? ()
#22 0xbfaed6b8 in ?? ()
#23 0x0000002f in ?? ()
#24 0x00000000 in ?? ()
#25 0x00000000 in ?? ()
#26 0x00000000 in ?? ()
#27 0x00000000 in ?? ()
#28 0x0fc9d000 in ?? ()
#29 0xc1f8c840 in ?? ()
#30 0xc26cb9b0 in ?? ()
#31 0xd65e6998 in ?? ()
#32 0xd65e696c in ?? ()
#33 0xc1ea59a0 in ?? ()
#34 0xc0535a20 in sched_switch (td=0x2827e95c, newtd=0x8082400) at /usr/src/sys/kern/sched_ule.c:1207
Previous frame inner to this frame (corrupt stack?)
(kgdb)