Panic in 5.4 as of today

FYI,

Riggs

[root] /usr/obj/usr/src/sys/ZAPHOD > kgdb kernel.debug /var/crash/vmcore.44
[GDB will not be able to debug user-mode threads: /usr/lib/libthread_db.so: Undefined symbol "ps_pglobal_lookup"]
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#0  doadump () at pcpu.h:159
159             __asm __volatile("movl %%fs:0,%0" : "=r" (td));
(kgdb) backtrace
#0  doadump () at pcpu.h:159
#1  0xc05356ea in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:410
#2  0xc0535a1b in panic (fmt=0xc06bebe3 "from debugger") at /usr/src/sys/kern/kern_shutdown.c:566
#3  0xc0443c43 in db_panic (addr=-1066853937, have_addr=0, count=-1, modif=0xeb94f760 "") at /usr/src/sys/ddb/db_command.c:435
#4  0xc0443bbc in db_command (last_cmdp=0xc0724f64, cmd_table=0x0, aux_cmd_tablep=0xc06ee3ec, aux_cmd_tablep_end=0xc06ee3f0)
    at /usr/src/sys/ddb/db_command.c:349
#5  0xc0443cad in db_command_loop () at /usr/src/sys/ddb/db_command.c:455
#6  0xc0445b65 in db_trap (type=12, code=0) at /usr/src/sys/ddb/db_main.c:221
#7  0xc0550d74 in kdb_trap (type=0, code=0, tf=0xeb94f914) at /usr/src/sys/kern/subr_kdb.c:418
#8  0xc0693aab in trap_fatal (frame=0xeb94f914, eva=0) at /usr/src/sys/i386/i386/trap.c:804
#9  0xc06937e6 in trap_pfault (frame=0xeb94f914, usermode=0, eva=9040649) at /usr/src/sys/i386/i386/trap.c:727
#10 0xc0693373 in trap (frame=
      {tf_fs = -342622184, tf_es = -1068367856, tf_ds = 16, tf_edi = 9040649, tf_esi = -1035455488, tf_ebp = -342558252, tf_isp = -342558400, tf_ebx = 0, tf_edx = -1034633216, tf_ecx = 35, tf_eax = 0, tf_trapno = 12, tf_err = 2, tf_eip = -1066853937, tf_cs = 8, tf_eflags = 66050, tf_esp = 3910276, tf_ss = -1067280105}) at /usr/src/sys/i386/i386/trap.c:417
#11 0xc0681d5a in calltrap () at /usr/src/sys/i386/i386/exception.s:140
#12 0xeb940018 in ?? ()
#13 0xc0520010 in kse_exit (td=0xc254c000, uap=0x3baa84) at /usr/src/sys/kern/kern_kse.c:314
#14 0xc063227d in ufs_lookup (ap=0xeb94fafc) at /usr/src/sys/ufs/ufs/ufs_lookup.c:599
#15 0xc063944f in ufs_vnoperate (ap=0x0) at /usr/src/sys/ufs/ufs/ufs_vnops.c:2821
#16 0xc0589fd8 in vfs_cache_lookup (ap=0x0) at vnode_if.h:82
#17 0xc063944f in ufs_vnoperate (ap=0x0) at /usr/src/sys/ufs/ufs/ufs_vnops.c:2821
#18 0xc058ff53 in lookup (ndp=0xeb94fc24) at vnode_if.h:52
#19 0xc058f95b in namei (ndp=0xeb94fc24) at /usr/src/sys/kern/vfs_lookup.c:181
#20 0xc059ea78 in stat (td=0xc28b3af0, uap=0xeb94fd14) at /usr/src/sys/kern/vfs_syscalls.c:2018
#21 0xc0693e48 in syscall (frame=
      {tf_fs = 136314927, tf_es = 136183855, tf_ds = -1078001617, tf_edi = 136352297, tf_esi = 136246540, tf_ebp = -1077940968, tf_isp = -342557324, tf_ebx = 29, tf_edx = 136352292, tf_ecx = -1077941995, tf_eax = 188, tf_trapno = 0, tf_err = 2, tf_eip = 673726187, tf_cs = 31, tf_eflags = 582, tf_esp = -1077942244, tf_ss = 47}) at /usr/src/sys/i386/i386/trap.c:1001
#22 0xc0681daf in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:201
#23 0x0820002f in ?? ()
#24 0x081e002f in ?? ()
#25 0xbfbf002f in ?? ()
#26 0x08209229 in ?? ()
#27 0x081ef50c in ?? ()
#28 0xbfbfed18 in ?? ()
#29 0xeb94fd74 in ?? ()
#30 0x0000001d in ?? ()
#31 0x08209224 in ?? ()
#32 0xbfbfe915 in ?? ()
#33 0x000000bc in ?? ()
#34 0x00000000 in ?? ()
#35 0x00000002 in ?? ()
#36 0x28283eeb in ?? ()
#37 0x0000001f in ?? ()
#38 0x00000246 in ?? ()
#39 0xbfbfe81c in ?? ()
#40 0x0000002f in ?? ()
#41 0x00000000 in ?? ()
#42 0x00000000 in ?? ()
#43 0x00000000 in ?? ()
#44 0x00000000 in ?? ()
#45 0x3e991000 in ?? ()
---Type <return> to continue, or q <return> to quit---
#46 0xc28b3c40 in ?? ()
#47 0xc227f190 in ?? ()
#48 0xeb94f7dc in ?? ()
#49 0xeb94f7c4 in ?? ()
#50 0xc28b3af0 in ?? ()
#51 0xc0547e1b in sched_switch (td=0x1d, newtd=0x81ef50c, flags=Cannot access memory at address 0xbfbfed28
) at /usr/src/sys/kern/sched_ule.c:1300
Previous frame inner to this frame (corrupt stack?)
(kgdb)

-- 
- "[...] I talked to the computer at great length and
-- explained my view of the Universe to it" said Marvin.
--- And what happened?" pressed Ford.
---- "It committed suicide." said Marvin.