[DragonFlyBSD - Bug #556] (Feedback) usb stick/hub detach panic

bugtracker-admin at leaf.dragonflybsd.org bugtracker-admin at leaf.dragonflybsd.org
Mon Jun 2 03:35:20 PDT 2014

Issue #556 has been updated by tuxillo.

Status changed from New to Feedback

Hi all,

Is there any way we can check this at all? We're using U4B now.
Matt, do you still have that keyboard/computer?

Best regards,
Antonio Huete

Bug #556: usb stick/hub detach panic

* Author: corecode
* Status: Feedback
* Priority: Normal
* Assignee: tuxillo
* Category: Driver
* Target version: 3.8.0

100% reproducible panic on detach of my usb stick.  ehci is loaded as well.  UP system.

#12 0xc0194734 in kprintf (fmt=0xdeadc0de <Address 0xdeadc0de out of bounds>)
    at /usr/build/src/sys/kern/subr_prf.c:304
#13 0xc0260cfd in usb_disconnect_port (up=0xc415a178, parent=0xdeadc0de)
    at /usr/build/src/sys/bus/usb/usb_subr.c:1382
#14 0xc02621a3 in uhub_detach (self=0xc415a100) at /usr/build/src/sys/bus/usb/uhub.c:610
#15 0xc018d9ae in device_detach (dev=0xc415a100) at device_if.h:48
#16 0xc018cef9 in device_delete_child (dev=0xdeadc0de, child=0xc415a100)
    at /usr/build/src/sys/kern/subr_bus.c:591
#17 0xc0260d4b in usb_disconnect_port (up=0xc698b1f4, parent=0xdeadc0de)
    at /usr/build/src/sys/bus/usb/usb_subr.c:1387
#18 0xc0261f33 in uhub_explore (dev=0xc4139940) at /usr/build/src/sys/bus/usb/uhub.c:460
#19 0xc025c6b7 in usb_discover (v=0xc695d9e0) at /usr/build/src/sys/bus/usb/usb.c:780
#20 0xc025bf71 in usb_event_thread (arg=0xc695d9e0) at /usr/build/src/sys/bus/usb/usb.c:469

gdb is broken somehow, the 0xdeadc0de arguments are not true, except for for kprintf.

(kgdb) fra 13
#13 0xc0260cfd in usb_disconnect_port (up=0xc415a178, parent=0xdeadc0de)
    at /usr/build/src/sys/bus/usb/usb_subr.c:1382
1382                            kprintf("%s: at %s", USBDEVPTRNAME(dev->subdevs[i]),
(kgdb) p dev->subdevs[0]
$1 = 0xc415a190
(kgdb) p *dev->subdevs[0]
$2 = {ops = 0xc415abf8, link = {tqe_next = 0xdeadc0de, tqe_prev = 0xdeadc0de}, 
  parent = 0xdeadc0de, children = {tqh_first = 0xdeadc0de, tqh_last = 0xdeadc0de}, 
  driver = 0xdeadc0de, devclass = 0xdeadc0de, unit = -559038242, 
  nameunit = 0xdeadc0de <Address 0xdeadc0de out of bounds>, 
  desc = 0xdeadc0de <Address 0xdeadc0de out of bounds>, busy = -559038242, state = 3735929054, 
  devflags = 3735929054, flags = 49374, order = 173 '�', pad = 222 '�, ivars = 0xdeadc0de, 
  softc = 0x0}

this stick has an integrated usb hub.

dump arriving on leaf at ~corecode/crash/*13*


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