(kgdb) bt #0 doadump () at pcpu.h:165 #1 0xc04ca197 in boot (howto=260) at ../../../kern/kern_shutdown.c:409 #2 0xc04ca42f in panic (fmt=0xc0608660 "%s") at ../../../kern/kern_shutdown.c:565 #3 0xc05e7818 in trap_fatal (frame=0xd4401658, eva=0) at ../../../i386/i386/trap.c:837 #4 0xc05e7538 in trap_pfault (frame=0xd4401658, usermode=0, eva=4) at ../../../i386/i386/trap.c:745 #5 0xc05e71a3 in trap (frame= {tf_fs = -1067057144, tf_es = -1067122648, tf_ds = 40, tf_edi = -733997368, tf_esi = -1017725952, tf_ebp = -733997228, tf_isp = -733997436, tf_ebx = 0, tf_edx = 4, tf_ecx = 2, tf_eax = 0, tf_trapno = 12, tf_err = 0, tf_eip = -1068998406, tf_cs = 32, tf_eflags = 590406, tf_esp = -1017725952, tf_ss = 0}) at ../../../i386/i386/trap.c:435 #6 0xc05d470a in calltrap () at ../../../i386/i386/exception.s:139 #7 0xc04860fa in uhub_child_pnpinfo_str (cbdev=0x0, child=0xc356c380, buf=0xc3524800 "", buflen=1024) at ../../../dev/usb/uhub.c:705 #8 0xc04e2507 in bus_child_pnpinfo_str (child=0x400, buf=0xc3524800 "", buflen=1024) at bus_if.h:575 #9 0xc04df03c in devadded (dev=0xc356c380) at ../../../kern/subr_bus.c:646 #10 0xc04e0997 in device_attach (dev=0xc356c380) at ../../../kern/subr_bus.c:2390 #11 0xc04e08b2 in device_probe_and_attach (dev=0xc356c380) at ../../../kern/subr_bus.c:2346 #12 0xc04894e5 in usbd_probe_and_attach (parent=0xc3398d00, dev=0xc356bc00, port=2, addr=4) at ../../../dev/usb/usb_subr.c:917 #13 0xc0489c06 in usbd_new_device (parent=0xc3398d00, bus=0xc33b3000, depth=-1017725892, speed=2, port=2, up=0xc339b6c4) at ../../../dev/usb/usb_subr.c:1157 #14 0xc0485cc1 in uhub_explore (dev=0xc339a480) at ../../../dev/usb/uhub.c:526 #15 0xc0486d79 in usb_discover (v=0xc33bc1c0) at ../../../dev/usb/usb.c:734 #16 0xc04866e1 in usb_event_thread (arg=0xc33bc1c0) at ../../../dev/usb/usb.c:424 #17 0xc04b5aae in fork_exit (callout=0xc0486660 , arg=0x0, frame=0x0) at ../../../kern/kern_fork.c:830 #18 0xc05d476c in fork_trampoline () at ../../../i386/i386/exception.s:208