2015-09-16 8:06 GMT+02:00 Matthew Grooms <mgro...@shrew.net>:

>
> It looks like my screenshot got scrubbed. Here is my hopefully faithful
> transcription ...
>
> Fatal trap 9: general protection fault while in kernel mode
> cpuid = 3; apic id = 03
> instruction pointer = 0x20:0xffffffff80a01105
> stack pointer           = 0x28:0xfffffe0092fe86f0
> frame pointer         = 0x28:0xfffffe0092fe8740
> code segment         = base 0x0, limit 0xfffff, type 0x1b
>                                  = DPL 0, pres 1, long 1, def32 0, gran 1
> processor eflags     = interrupt enabled, resume, IOPL = 0
> current process      = 716 (ifconfig)
> [thread pid 716 tid 100082 ]
> Stopped at      __mtx_lock_flags+0x55:  movq    (%r13),%rax
> db> bt
> Tracing pid 716 tid 100082 td 0xffffff800512814d0
> __mtx_lock_flags() at __mtx_lock_flags+0x55/frame 0xfffffe0092fe8740
> ieee80211_free_node() at ieee80211_free_node()_0x38/frame 0xfffffe0092fe8780
> ieee80211_node_vdetach() at ieee80211_node_vdetach()+0x2d/frame
> 0xfffffe0092fe87a0
> ieee80211_vap_detach() at ieee80211_vap_detach()+0x35e/frame
> 0xfffffe0092fe87d0
> urtwn_vap_delete() at urtwn_vap_delete()+0xe/frame 0xfffffe0092fe87f0
> if_clone_destroyif() at if_clone_destroyif()+0x1aa/frame 0xfffffe0092fe8840
> if_clone_destroy() at if_clone_destroy()0x8e/frame 0xfffffe0092fe8860
> kern_ioctl() at kern_ioctl()+0x230/frame 0xfffffe0092fe88c0
> sys_ioctl() at sys_ioctl()+0x153/frame 0xfffffe0092fe89a0
> amd64_syscall() at amd64_syscall()+0x282/frame 0xfffffe0092fe8ab0
> Xfast_syscall() at Xfast_syscall()+0xfb/frame 0xfffffe0092fe8ab0
> -- syscall (54, FreeBSD ELF64, sys_ioctl), rip = 0x8011e8c8a, rsp =
> 0x7fffffffe2f8, rbp = 0x7fffffffe310 --
> db>

Assuming dumpdev="AUTO" is set in /etc/rc.conf, you should have
entered 'dump' at the db> blinker :)

The trap details are found in /var/crash/, run kgdb: "kgdb
/boot/kernel/kernel /var/crash/vmcore.last", then run 'bt' and 'up' at
its prompt.

>
> -Matthew
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