panic in prison_check

Hi,

Got this panic when i started up a new xterm.

FreeBSD corona 5.2-CURRENT FreeBSD 5.2-CURRENT #0: Mon Aug 16 21:47:06 
CEST 2004     root_at_darkstar:/export/data/obj/usr/src/sys/CORONA  i386
up, sched_ule, debug.mpsafenet=1

(kgdb) bt
#0  doadump () at pcpu.h:159
#1  0xc04f9784 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:396
#2  0xc04f9b39 in panic (fmt=0xc06a5375 "%s")
     at /usr/src/sys/kern/kern_shutdown.c:558
#3  0xc0680c94 in trap_fatal (frame=0xcd35a938, eva=0)
     at /usr/src/sys/i386/i386/trap.c:812
#4  0xc0680952 in trap_pfault (frame=0xcd35a938, usermode=0, eva=1091844630)
     at /usr/src/sys/i386/i386/trap.c:730
#5  0xc06804ad in trap (frame=
       {tf_fs = -1047068648, tf_es = -852164592, tf_ds = -1068630000, 
tf_edi = -1042797472, tf_esi = 1092689110, tf_ebp = -852121196, tf_isp = 
-852121244, tf_ebx = -1043972492, tf_edx = 1091844626, tf_ecx = 
-1066410968, tf_eax = 0, tf_trapno = 12, tf_err = 2, tf_eip = 
-1068353462, tf_cs = 8, tf_eflags = 66054, tf_esp = 582, tf_ss = 
-852121212}) at /usr/src/sys/i386/i386/trap.c:417
#6  0xc0670efa in calltrap () at /usr/src/sys/i386/i386/exception.s:140
#7  0xc1970018 in ?? ()
#8  0xcd350010 in ?? ()
#9  0xc04e0010 in prison_check (cred1=0xc1c63e74, cred2=0x41211cd6)
     at /usr/src/sys/kern/kern_jail.c:402
#10 0xc0523768 in selwakeuppri (sip=0x0, pri=0)
     at /usr/src/sys/kern/sys_generic.c:1096
#11 0xc053300c in ttwakeup (tp=0xc1c63e00) at /usr/src/sys/kern/tty.c:2366
#12 0xc05318dc in ttymodem (tp=0xc1c63e00, flag=0)
     at /usr/src/sys/kern/tty.c:1625
#13 0xc0536487 in ptcopen (dev=0xc1cc4d00, flag=3, devtype=8192, td=0x0)
     at linedisc.h:136
#14 0xc04b570a in spec_open (ap=0xcd35aa70)
     at /usr/src/sys/fs/specfs/spec_vnops.c:207
#15 0xc04b53b8 in spec_vnoperate (ap=0x0)
     at /usr/src/sys/fs/specfs/spec_vnops.c:118
#16 0xc056eb8e in vn_open_cred (ndp=0xcd35abd8, flagp=0xcd35acd8, cmode=0,
     cred=0xc1d12780, fdidx=0) at vnode_if.h:228
#17 0xc056e723 in vn_open (ndp=0x0, flagp=0x0, cmode=0, fdidx=0)
     at /usr/src/sys/kern/vfs_vnops.c:91
#18 0xc0567383 in kern_open (td=0xc197dc60, path=0x0, 
pathseg=UIO_USERSPACE,
     flags=3, mode=0) at /usr/src/sys/kern/vfs_syscalls.c:957
#19 0xc0567260 in open (td=0x0, uap=0x0)
     at /usr/src/sys/kern/vfs_syscalls.c:926
#20 0xc0681040 in syscall (frame=
       {tf_fs = 47, tf_es = 47, tf_ds = 47, tf_edi = 134795403, tf_esi = 
134795392, tf_ebp = -1077946760, tf_isp = -852120204, tf_ebx = 
134795264, tf_edx = 11, tf_ecx = 11, tf_eax = 5, tf_trapno = 22, tf_err 
= 2, tf_eip = 675104111, tf_cs = 31, tf_eflags = 518, tf_esp = 
-1077946804, tf_ss = 47})
     at /usr/src/sys/i386/i386/trap.c:1004
#21 0xc0670f4f in Xint0x80_syscall () at 
/usr/src/sys/i386/i386/exception.s:201
#22 0x0000002f in ?? ()
#23 0x0000002f in ?? ()
#24 0x0000002f in ?? ()
#25 0x0808d08b in ?? ()
#26 0x0808d080 in ?? ()
#27 0xbfbfd678 in ?? ()
#28 0xcd35ad74 in ?? ()
#29 0x0808d000 in ?? ()
#30 0x0000000b in ?? ()
#31 0x0000000b in ?? ()
#32 0x00000005 in ?? ()
#33 0x00000016 in ?? ()
#34 0x00000002 in ?? ()
#35 0x283d456f in ?? ()
#36 0x0000001f in ?? ()
#37 0x00000206 in ?? ()
#38 0xbfbfd64c in ?? ()
#39 0x0000002f in ?? ()
#40 0x00000000 in ?? ()
#41 0x00000000 in ?? ()
#42 0x00000000 in ?? ()
#43 0x00000000 in ?? ()
#44 0x0e8bc000 in ?? ()
#45 0xc155f9a0 in ?? ()
---Type <return> to continue, or q <return> to quit---
#46 0xc15e3cd0 in ?? ()
#47 0xcd35aca4 in ?? ()
#48 0xcd35ac84 in ?? ()
#49 0xc197dc60 in ?? ()
#50 0xc050dd90 in sched_switch (td=0x808d000, newtd=0x808d08b)
     at /usr/src/sys/kern/sched_ule.c:1207
Previous frame inner to this frame (corrupt stack?)
(kgdb) p panicstr
$1 = 0xc06fe560 "page fault"

vmcore and kernel.debug is saved if more info is requested.

-- 
Pawel