clist reservation botch panic...

Howdy,

I am testing and fixing the new IPsec code we have and just came
across this:

Unread portion of the kernel message buffer:
panic: clist reservation botch
cpuid = 0
KDB: enter: panic

#0  kdb_enter (msg=0xc074a2fe "panic") at ../../../kern/subr_kdb.c:310
310     }

(kgdb) where
#0  kdb_enter (msg=0xc074a2fe "panic") at ../../../kern/subr_kdb.c:310
#1  0xc0524874 in panic (fmt=0xc075155d "clist reservation botch")
    at ../../../kern/kern_shutdown.c:547
#2  0xc05721fe in putc (chr=102, clistp=0xc1dd4038)
    at ../../../kern/tty_subr.c:104
#3  0xc0569333 in ttyoutput (c=102, tp=0xc1dd4000) at ../../../kern/tty.c:769
#4  0xc0569437 in ttyecho (c=Variable "c" is not available.
) at ../../../kern/tty.c:2406
#5  0xc056aff2 in ttyinput (c=102, tp=0xc1dd4000) at ../../../kern/tty.c:679
#6  0xc056b0ec in ttypend (tp=0xc1dd4000) at ../../../kern/tty.c:1704
#7  0xc056a704 in ttyinput (c=117, tp=0xc1dd4000) at ../../../kern/tty.c:377
#8  0xc06dfc54 in sioinput (com=0xc1dd4400) at linedisc.h:122
#9  0xc06e1ff3 in siopoll (dummy=0x0) at ../../../dev/sio/sio.c:1702
#10 0xc05096b5 in ithread_loop (arg=0xc1dbd7d0)
    at ../../../kern/kern_intr.c:1036
#11 0xc0506b58 in fork_exit (callout=0xc0509500 <ithread_loop>, 
    arg=0xc1dbd7d0, frame=0xcc53ed38) at ../../../kern/kern_fork.c:797
#12 0xc06eb490 in fork_trampoline () at
../../../i386/i386/exception.s:205


I don't think I'm doing anything "funky" but who knows.  Anyone have
their hands in the tty code at the moment?

This is on CURRENT of a week ago, kernel config is attached to the
email, and this system is running on VMware.

Let me know what other information I can provide.

Best,
George