panic on application core dump?

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Well, this is new.  It looks like current panic'd when trying to dump a
core from a qemu crash?  I can leave this at the debugger for now as
this is a machine doing mips package builds and is not "production".

sean

Thu Feb 19 18:50:59 UTC 2015

FreeBSD/amd64 (dirty.ysv.freebsd.org) (ttyu0)

login: Feb 20 08:06:05 dirty sshd[51311]: fatal: Read from socket
failed: Connection reset by peer [preauth]
Feb 20 16:47:29 dirty su: sbruno to root on /dev/pts/1
Feb 21 02:15:44 dirty sshd[95051]: fatal: Read from socket failed:
Connection reset by peer [preauth]


Fatal trap 12: page fault while in kernel mode
cpuid = 15; apic id = 35
fault virtual address   = 0x380
fault code              = supervisor read data, page not present
instruction pointer     = 0x20:0xffffffff809b2ed1
stack pointer           = 0x28:0xfffffe046a3a30f0
frame pointer           = 0x28:0xfffffe046a3a3170
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         = 42563 (qemu-mips64)
[ thread pid 42563 tid 100956 ]
Stopped at      __mtx_lock_sleep+0xb1:  movl    0x380(%rax),%ecx
db> bt
Tracing pid 42563 tid 100956 td 0xfffff80109a214a0
__mtx_lock_sleep() at __mtx_lock_sleep+0xb1/frame 0xfffffe046a3a3170
vref() at vref+0x6d/frame 0xfffffe046a3a31a0
vn_fullpath1() at vn_fullpath1+0x62/frame 0xfffffe046a3a3200
vn_fullpath_global() at vn_fullpath_global+0x6e/frame 0xfffffe046a3a3240
sigexit() at sigexit+0xa22/frame 0xfffffe046a3a34f0
sendsig() at sendsig+0x65e/frame 0xfffffe046a3a3960
trapsignal() at trapsignal+0x2f7/frame 0xfffffe046a3a39e0
trap() at trap+0x3ba/frame 0xfffffe046a3a3bf0
calltrap() at calltrap+0x8/frame 0xfffffe046a3a3bf0
- --- trap 0xc, rip = 0x600334bc, rsp = 0x7ffbffe19990, rbp =
0x7ffffffe4a20 ---
db> p vref+0x6d
ffffffff80a876cd

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