Re: panic attaching usb

--- Gardner Bell <gbell72_at_rogers.com> wrote:

> 
> --- Gardner Bell <gbell72_at_rogers.com> wrote:
> 
> > Hello,
> > 
> > I just mounted my external USB drive and received the following
> > panic. 
> > This machine is running amd64 8.0-CURRENT from  05/28/2008.  If any
> > other info is required I'll be more than happy to provide it.
> > 
> > db> s
> > 
> > Fatal trap 12: page fault while in kernel mode
> > cpuid = 1; apic id = 01
> > fault virtual address   = 0x18
> > fault code              = supervisor read data, page not present
> > instruction pointer     = 0x8:0xffffffff80248450
> > stack pointer           = 0x10:0xffffffff808d0770
> > frame pointer           = 0x10:0xffffffff808d0780
> > code segment            = base 0x0, limit 0xfffff, type 0x1b
> >                         = DPL 0, pres 1, long 1, def32 0, gran 1
> > processor eflags        = trace trap, interrupt enabled, resume,
> IOPL
> > =
> > 0
> > current process         = 17 (usb1)
> > [thread pid 17 tid 100029 ]
> > Stopped at      _mtx_assert+0x60:       movq    0x18(%rdi),%rax
> > db>bt
> > Tracing pid 17 tid 100029 td 0xffffff0001170000
> > _mtx_assert() at _mtx_assert+0x60
> > xpt_release_ccb() at xpt_release_ccb+0x49
> > probedone() at probedone+0x29a
> > camisr_runqueue() at camisr_runqueue+0x1a7
> > xpt_bus_deregister() at xpt_bus_deregister+0x185
> > umass_cam_detach_sim() at umass_cam_detach_sim+0x1f
> > umass_detach() at umass_detach+0xcf
> > device_detach() at device_detach+0xa4
> > usb_disconnect_port() at usb_disconnect_port+0x8b
> > uhub_explore() at uhub_explore+0x10d
> > usb_discover() at usb_discover+0x38
> > usb_event_thread() at usb_event_thread+0x7c
> > fork_exit() at fork_exit+0x12a
> > fork_trampoline() at fork_trampoline+0xe
> > --- trap 0, rip = 0, rsp = 0xffffffff808d0d30, rbp = 0 ---
> > db>show alllocks
> > Process 924 (ntpd) thread 0xffffff00013a56c0 (100091)
> > exclusive sleep mutex sigacts r = 0 (0xffffff000126eca8) locked _at_
> > /usr/src/sys/k
> > ern/subr_trap.c:223
> > exclusive sleep mutex process lock r = 0 (0xffffff000139d0f8)
> locked
> > _at_
> > /usr/src/
> > sys/kern/subr_trap.c:222
> > Process 17 (usb1) thread 0xffffff0001170000 (100029)
> > exclusive sleep mutex Giant r = 0 (0xffffffff80585540) locked _at_
> > /usr/src/sys/dev
> > /usb/uhub.c:639
> > db>show thread 100029
> > Thread 100029 at 0xffffff0001170000:
> >  proc (pid 17): 0xffffff000116a860
> >  name: usb1
> >  stack: 0xffffffff808cd000-0xffffffff808d0fff
> >  flags: 0x10005  pflags: 0x200000
> >  state: RUNNING (CPU 1)
> >  priority: 24
> > db>tr 100029
> > Tracing pid 17 tid 100029 td 0xffffff0001170000
> > _mtx_assert() at _mtx_assert+0x60
> > xpt_release_ccb() at xpt_release_ccb+0x49
> > probedone() at probedone+0x29a
> > camisr_runqueue() at camisr_runqueue+0x1a7
> > xpt_bus_deregister() at xpt_bus_deregister+0x185
> > umass_cam_detach_sim() at umass_cam_detach_sim+0x1f
> > umass_detach() at umass_detach+0xcf
> > device_detach() at device_detach+0xa4
> > usb_disconnect_port() at usb_disconnect_port+0x8b
> > uhub_explore() at uhub_explore+0x10d
> > usb_discover() at usb_discover+0x38
> > usb_event_thread() at usb_event_thread+0x7c
> > fork_exit() at fork_exit+0x12a
> > fork_trampoline() at fork_trampoline+0xe
> > --- trap 0, rip = 0, rsp = 0xffffffff808d0d30, rbp = 0 ---
> > db>
 
Sorry, replying to myself but here is the contents of the instruction
pointer
 
(kgdb) l *0xffffffff80248450
0xffffffff80248450 is in _mtx_assert
(/usr/src/sys/kern/kern_mutex.c:638).
633                     return;
634             switch (what) {
635             case MA_OWNED:
636             case MA_OWNED | MA_RECURSED:
637             case MA_OWNED | MA_NOTRECURSED:
638                     if (!mtx_owned(m))
639                             panic("mutex %s not owned at %s:%d",
640                                 m->lock_object.lo_name, file,
line);
641                     if (mtx_recursed(m)) {
642                             if ((what & MA_NOTRECURSED) != 0)
(kgdb)