Panic attaching iPod mini

[Florian C. Smeets]

Hi,

until recently i was able to plugin my iPod mini so that it would load 
the battery, it does not create the da* devices but thats another story. 
Now when i attach my iPod mini to the usb port i get this panic:

root at bsdix [~] 8 >kgdb /usr/obj/usr/src/sys/BSDIX/kernel.debug 
/usr/crash/vmcore.68
[GDB will not be able to debug user-mode threads: 
/usr/lib/libthread_db.so: Undefined symbol "ps_pglobal_lookup"]
GNU gdb 6.1.1 [FreeBSD]
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welcome to change it and/or distribute copies of it under certain 
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This GDB was configured as "i386-marcel-freebsd".
#0  doadump () at pcpu.h:164
164     pcpu.h: No such file or directory.
         in pcpu.h
(kgdb) where
#0  doadump () at pcpu.h:164
#1  0xc0474235 in db_fncall (dummy1=0, dummy2=0, dummy3=1999, 
dummy4=0xcbfefa04 "Àÿ\177À")
     at /usr/src/sys/ddb/db_command.c:531
#2  0xc0473fc2 in db_command (last_cmdp=0xc07ff6c4, cmd_table=0x0, 
aux_cmd_tablep=0xc07c426c,
     aux_cmd_tablep_end=0xc07c4270) at /usr/src/sys/ddb/db_command.c:349
#3  0xc04740d5 in db_command_loop () at /usr/src/sys/ddb/db_command.c:455
#4  0xc0476215 in db_trap (type=3, code=0) at /usr/src/sys/ddb/db_main.c:221
#5  0xc0585e47 in kdb_trap (type=0, code=0, tf=0xcbfefb5c) at 
/usr/src/sys/kern/subr_kdb.c:421
#6  0xc074a4e8 in trap (frame=
       {tf_fs = 24, tf_es = -1065025520, tf_ds = -872546288, tf_edi = 
-1065013748, tf_esi = 0, tf_ebp = -872481884, tf_isp = -872481912, 
tf_ebx = -1, tf_edx = 1, tf_ecx = -1056878592, tf_eax = 25, tf_trapno = 
3, tf_err = 0, tf_eip = -1067951296, tf_cs = 8, tf_eflags = 524950, 
tf_esp = -1065745295, tf_ss = -1065949962}) at 
/usr/src/sys/i386/i386/trap.c:573
#7  0xc07379ca in calltrap () at /usr/src/sys/i386/i386/exception.s:139
#8  0x00000018 in ?? ()
#9  0xc0850010 in w_locklistdata ()
#10 0xcbfe0010 in ?? ()
#11 0xc0852e0c in w_locklistdata ()
#12 0x00000000 in ?? ()
#13 0xcbfefba4 in ?? ()
#14 0xcbfefb88 in ?? ()
#15 0xffffffff in ?? ()
#16 0x00000001 in ?? ()
#17 0xc1015000 in ?? ()
#18 0x00000019 in ?? ()
#19 0x00000003 in ?? ()
#20 0x00000000 in ?? ()
#21 0xc0585b40 in kdb_enter (msg=0x0) at cpufunc.h:60
#22 0xc05928f4 in witness_warn (flags=5, lock=0x0,
     fmt=0xc07b5cad "malloc(M_WAITOK) of \"%s\", forcing M_NOWAIT")
     at /usr/src/sys/kern/subr_witness.c:1225
#23 0xc06df045 in uma_zalloc_arg (zone=0xc1045720, udata=0x0, flags=2)
     at /usr/src/sys/vm/uma_core.c:1810
#24 0xc055b7c6 in malloc (size=608, type=0xc07d5100, flags=2) at uma.h:276
#25 0xc05020be in umass_cam_rescan (addr=0xc17a1e00) at 
/usr/src/sys/dev/usb/umass.c:2239
#26 0xc0575beb in softclock (dummy=0x0) at 
/usr/src/sys/kern/kern_timeout.c:295
#27 0xc054e8e2 in ithread_loop (arg=0xc14fb480) at 
/usr/src/sys/kern/kern_intr.c:546
#28 0xc054d906 in fork_exit (callout=0xc054e770 <ithread_loop>, arg=0x0, 
frame=0x0)
     at /usr/src/sys/kern/kern_fork.c:790
#29 0xc0737a2c in fork_trampoline () at 
/usr/src/sys/i386/i386/exception.s:208
(kgdb)

Kernel is
FreeBSD bsdix.materna-com.de 6.0-CURRENT FreeBSD 6.0-CURRENT #281: Tue 
Mar 22 00:18:05 CET 2005 
root at bsdix.materna-com.de:/usr/obj/usr/src/sys/BSDIX  i386

with sources cvsuped little before.	

The iPod is connected to a uhci controller:

uhci0: <Intel 82371AB/EB (PIIX4) USB controller> port 0xdce0-0xdcff irq 
11 at device 7.2 on pci0
uhci0: [GIANT-LOCKED]
uhci0: LegSup = 0x0000
usb0: <Intel 82371AB/EB (PIIX4) USB controller> on uhci0

I hope i did not miss any useful information, and the information 
provided is useful at all...

Cheers,
Florian