"locking against myself" with sysmon_envsys/libprop stuff

[Geoff Wing <gcw%pobox.com@localhost>]

Here's a current (2008-05-06) problem.
I believe it was running /etc/rc.d/envsys during boot.

Regards,
Geoff

#0  0xc036fa23 in cpu_reboot (howto=260, bootstr=0x0)
    at ../../../../arch/i386/i386/machdep.c:891
#1  0xc016c8a9 in db_reboot_cmd (addr=-1072242227, have_addr=false, 
    count=-789055728, modif=0xd0f7f680 "\023")
    at ../../../../ddb/db_command.c:1295
#2  0xc016c3b1 in db_command (last_cmdp=<value optimized out>)
    at ../../../../ddb/db_command.c:921
#3  0xc016c6f4 in db_command_loop () at ../../../../ddb/db_command.c:566
#4  0xc016f43d in db_trap (type=1, code=0) at ../../../../ddb/db_trap.c:101
#5  0xc036b7a3 in kdb_trap (type=1, code=0, regs=0xd0f7f89c)
    at ../../../../arch/i386/i386/db_interface.c:231
#6  0xc0373712 in trap (frame=0xd0f7f89c)
    at ../../../../arch/i386/i386/trap.c:346
#7  0xc010cedf in calltrap ()
#8  0xc036a0ac in breakpoint ()
#9  0xc02e1302 in panic (fmt=0xc050ae7b "LOCKDEBUG")
    at ../../../../kern/subr_prf.c:257
#10 0xc02d9dea in lockdebug_abort1 (ld=0xcc077f00, lk=0xc05e39c0, 
    func=0xc04676de "lockdebug_wantlock", 
    msg=0xc04f51cb "locking against myself", dopanic=true)
    at ../../../../kern/subr_lockdebug.c:799
#11 0xc02bec00 in rw_vector_enter (rw=0xcc08cfc8, op=RW_READER)
    at ../../../../kern/kern_rwlock.c:297
#12 0xc0443418 in _prop_dictionary_iterator_reset (v=0xc2af03a0)
    at 
../../../../../../lib/libkern/../../../common/lib/libprop/prop_dictionary.c:602
#13 0xc0443bf6 in prop_dictionary_iterator (pd=0xcc08cfc0)
    at 
../../../../../../lib/libkern/../../../common/lib/libprop/prop_dictionary.c:767
#14 0xc0443ca0 in _prop_dictionary_externalize (ctx=0xc2c71070, v=0xcc08cfc0)
    at 
../../../../../../lib/libkern/../../../common/lib/libprop/prop_dictionary.c:412
#15 0xc0443122 in prop_dictionary_externalize (pd=0xcc08cfc0)
    at 
../../../../../../lib/libkern/../../../common/lib/libprop/prop_dictionary.c:1126
#16 0xc043fe50 in _prop_object_copyout_ioctl (pref=0xd0f7fc50, 
    cmd=<value optimized out>, obj=0xcc08cfc0)
    at ../../../../../../lib/libkern/../../../common/lib/libprop/prop_kern.c:323
#17 0xc011bebd in sysmonioctl_envsys (dev=17152, cmd=3221767424, 
    data=0xd0f7fc50, flag=1, l=0xd1037260)
    at ../../../../dev/sysmon/sysmon_envsys.c:184
#18 0xc032cabe in spec_ioctl (v=0xd0f7fb40)
    at ../../../../miscfs/specfs/spec_vnops.c:665
#19 0xc0325a0d in VOP_IOCTL (vp=0xce46b078, command=3221767424, 
    data=0xd0f7fc50, fflag=1, cred=0xcc085f00)
    at ../../../../kern/vnode_if.c:562
#20 0xc03234bb in vn_ioctl (fp=0xd1087f40, com=3221767424, data=0xd0f7fc50)
    at ../../../../kern/vfs_vnops.c:624
#21 0xc02e7ca6 in sys_ioctl (l=0xd1037260, uap=0xd0f7fd00, retval=0xd0f7fd28)
    at ../../../../kern/sys_generic.c:616
#22 0xc0373172 in syscall (frame=0xd0f7fd48)
    at ../../../../arch/i386/i386/syscall.c:102
#23 0xc010054d in syscall1 ()