GNU gdb (GDB) 7.6.1
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-dragonfly".
For bug reporting instructions, please see:
<http://bugs.dragonflybsd.org/>...
Reading symbols from /var/crash/kern.15...done.

Unread portion of the kernel message buffer:


[New pid 915/115, firefox]
[New pid 915/118, firefox]
[New pid 915/62, firefox]
[New pid 915/15, firefox]
[New pid 915/66, firefox]
[New pid 915/80, firefox]
[New pid 915/81, firefox]
[New pid 915/7, firefox]
[New pid 915/103, firefox]
[New pid 915/79, firefox]
[New pid 915/70, firefox]
[New pid 915/44, firefox]
[New pid 915/34, firefox]
[New pid 915/2, firefox]
[New kernel syscons8]
[New kernel h2xop-DATA.47]
[New kernel h2xop-DATA.35]
[New kernel h2xop-DATA.23]
[New kernel h2xop-DATA.11]
[New kernel syncer6]
[New kernel pagedaemon]
[New kernel h2xop-ROOT.47]
[New kernel h2xop-ROOT.35]
[New kernel h2xop-ROOT.23]
[New kernel h2xop-ROOT.11]
[New kernel unp taskq]
[New kernel ahci0.1]
[New kernel crypto 11]
[New kernel sensors 11]
[New kernel netisr 11]
[New kernel taskq_cpu 11]
[New kernel cpuhelper 11]
[New kernel dsched 11]
[New kernel usched 11]
[New kernel usched 11]
[New kernel softclock 11]
[New kernel idle_11]
[New pid 915/128, firefox]
[New pid 915/113, firefox]
[New pid 899/1, Xorg]
[New pid 915/25, firefox]
[New pid 915/29, firefox]
[New pid 915/14, firefox]
[New pid 915/59, firefox]
[New pid 915/11, firefox]
[New pid 915/42, firefox]
[New pid 915/18, firefox]
[New pid 915/111, firefox]
[New pid 915/110, firefox]
[New pid 915/106, firefox]
[New pid 915/84, firefox]
[New pid 915/87, firefox]
[New pid 915/47, firefox]
[New pid 915/40, firefox]
[New kernel syscons7]
[New kernel h2xop-DATA.46]
[New kernel h2xop-DATA.34]
[New kernel h2xop-DATA.22]
[New kernel h2xop-DATA.10]
[New kernel syncer5]
[New kernel h2xop-ROOT.46]
[New kernel h2xop-ROOT.34]
[New kernel h2xop-ROOT.22]
[New kernel h2xop-ROOT.10]
[New kernel serno/21142E2415]
[New kernel ahci0.0]
[New kernel crypto 10]
[New kernel sensors 10]
[New kernel netisr 10]
[New kernel taskq_cpu 10]
[New kernel cpuhelper 10]
[New kernel dsched 10]
[New kernel usched 10]
[New kernel usched 10]
[New kernel softclock 10]
[New kernel idle_10]
[New pid 915/1, firefox]
[New pid 915/116, firefox]
[New pid 915/24, firefox]
[New pid 915/54, firefox]
[New pid 915/19, firefox]
[New pid 915/67, firefox]
[New pid 915/56, firefox]
[New pid 915/93, firefox]
[New pid 915/85, firefox]
[New pid 915/88, firefox]
[New pid 915/36, firefox]
[New kernel syscons6]
[New kernel h2xop-DATA.45]
[New kernel h2xop-DATA.33]
[New kernel h2xop-DATA.21]
[New kernel h2xop-DATA.09]
[New kernel syscons255]
[New kernel h2xop-ROOT.45]
[New kernel h2xop-ROOT.33]
[New kernel h2xop-ROOT.21]
[New kernel h2xop-ROOT.09]
[New kernel syncer3]
[New kernel usbus0]
[New kernel crypto 9]
[New kernel sensors 9]
[New kernel netisr 9]
[New kernel taskq_cpu 9]
[New kernel cpuhelper 9]
[New kernel dsched 9]
[New kernel usched 9]
[New kernel usched 9]
[New kernel softclock 9]
[New kernel idle_9]
[New pid 915/126, firefox]
[New pid 915/3, firefox]
[New pid 915/98, firefox]
[New pid 915/28, firefox]
[New pid 915/61, firefox]
[New pid 915/104, firefox]
[New pid 915/99, firefox]
[New pid 915/35, firefox]
[New pid 906/1, xclock]
[New kernel syscons5]
[New kernel h2xop-DATA.44]
[New kernel h2xop-DATA.32]
[New kernel h2xop-DATA.20]
[New kernel h2xop-DATA.08]
[New kernel syncer4]
[New kernel h2xop-ROOT.44]
[New kernel h2xop-ROOT.32]
[New kernel h2xop-ROOT.20]
[New kernel h2xop-ROOT.08]
[New kernel syncer2]
[New kernel usbus0]
[New kernel crypto 8]
[New kernel sensors 8]
[New kernel netisr 8]
[New kernel taskq_cpu 8]
[New kernel cpuhelper 8]
[New kernel dsched 8]
[New kernel usched 8]
[New kernel usched 8]
[New kernel softclock 8]
[New kernel idle_8]
[New pid 915/119, firefox]
[New pid 899/2, Xorg]
[New pid 915/9, firefox]
[New pid 915/100, firefox]
[New pid 915/16, firefox]
[New pid 915/8, firefox]
[New pid 915/32, firefox]
[New pid 915/31, firefox]
[New pid 915/23, firefox]
[New pid 915/65, firefox]
[New pid 915/78, firefox]
[New pid 915/112, firefox]
[New pid 915/91, firefox]
[New pid 907/1, xterm]
[New kernel hdac taskq]
[New pid 832/1, dhclient]
[New pid 672/1, sshd]
[New kernel syscons4]
[New pid 311/1, dhclient]
[New kernel h2xop-DATA.43]
[New kernel h2xop-DATA.31]
[New kernel h2xop-DATA.19]
[New kernel h2xop-DATA.07]
[New kernel consttyd]
[New kernel h2xop-ROOT.43]
[New kernel h2xop-ROOT.31]
[New kernel h2xop-ROOT.19]
[New kernel h2xop-ROOT.07]
[New kernel syncer1]
[New kernel usbus0]
[New kernel crypto 7]
[New kernel sensors 7]
[New kernel netisr 7]
[New kernel taskq_cpu 7]
[New kernel cpuhelper 7]
[New kernel dsched 7]
[New kernel usched 7]
[New kernel usched 7]
[New kernel softclock 7]
[New kernel idle_7]
[New pid 915/122, firefox]
[New pid 915/53, firefox]
[New pid 915/27, firefox]
[New pid 915/13, firefox]
[New pid 915/75, firefox]
[New pid 915/20, firefox]
[New pid 915/74, firefox]
[New pid 913/1, csh]
[New pid 915/73, firefox]
[New pid 915/69, firefox]
[New pid 915/52, firefox]
[New pid 915/38, firefox]
[New pid 830/1, getty]
[New pid 428/1, syslogd]
[New kernel syscons15]
[New kernel syscons3]
[New kernel h2xop-DATA.42]
[New kernel h2xop-DATA.30]
[New kernel h2xop-ROOT.18]
[New kernel h2xop-ROOT.06]
[New kernel ahci1.0]
[New kernel usbus0]
[New kernel crypto 6]
[New kernel sensors 6]
[New kernel netisr 6]
[New kernel taskq_cpu 6]
[New kernel cpuhelper 6]
[New kernel dsched 6]
[New kernel usched 6]
[New kernel usched 6]
[New kernel softclock 6]
[New kernel idle_6]
[New pid 915/123, firefox]
[New pid 915/60, firefox]
[New pid 915/51, firefox]
[New pid 915/46, firefox]
[New pid 915/48, firefox]
[New pid 915/6, firefox]
[New pid 915/96, firefox]
[New pid 915/90, firefox]
[New pid 915/39, firefox]
[New pid 915/5, firefox]
[New pid 910/1, csh]
[New kernel ithread16 5]
[New kernel syscons14]
[New kernel syscons2]
[New kernel h2xop-DATA.41]
[New kernel h2xop-DATA.29]
[New kernel h2xop-DATA.17]
[New kernel h2xop-DATA.05]
[New kernel bufdaemon_hw]
[New kernel h2xop-ROOT.41]
[New kernel h2xop-ROOT.29]
[New kernel h2xop-ROOT.17]
[New kernel h2xop-ROOT.05]
[New kernel usbus1]
[New kernel xpt_thrd]
[New kernel crypto 5]
[New kernel sensors 5]
[New kernel ithread197 5]
[New kernel ithreadE 5]
[New kernel netisr 5]
[New kernel taskq_cpu 5]
[New kernel cpuhelper 5]
[New kernel dsched 5]
[New kernel usched 5]
[New kernel usched 5]
[New kernel softclock 5]
[New kernel idle_5]
[New pid 915/127, firefox]
[New pid 915/43, firefox]
[New pid 915/95, firefox]
[New pid 915/26, firefox]
[New pid 915/30, firefox]
[New pid 915/101, firefox]
[New pid 915/105, firefox]
[New pid 915/102, firefox]
[New pid 915/21, firefox]
[New pid 915/17, firefox]
[New pid 909/1, csh]
[New pid 908/1, xterm]
[New kernel ithread17 4]
[New kernel ithreadE 4]
[New kernel syscons13]
[New kernel syscons1]
[New kernel h2xop-DATA.40]
[New kernel h2xop-DATA.28]
[New kernel h2xop-DATA.16]
[New kernel h2xop-DATA.04]
[New kernel bufdaemon]
[New kernel h2xop-ROOT.40]
[New kernel h2xop-ROOT.28]
[New kernel h2xop-ROOT.16]
[New kernel h2xop-ROOT.04]
[New kernel usbus1]
[New kernel crypto returns]
[New kernel crypto 4]
[New kernel sensors 4]
[New kernel netisr 4]
[New kernel taskq_cpu 4]
[New kernel cpuhelper 4]
[New kernel dsched 4]
[New kernel usched 4]
[New kernel usched 4]
[New kernel softclock 4]
[New kernel idle_4]
[New pid 915/125, firefox]
[New pid 915/124, firefox]
[New pid 915/77, firefox]
[New pid 915/94, firefox]
[New pid 356/1, moused]
[New pid 915/97, firefox]
[New pid 915/72, firefox]
[New pid 915/76, firefox]
[New pid 915/89, firefox]
[New pid 915/86, firefox]
[New pid 831/1, getty]
[New pid 374/1, devd]
[New kernel syscons12]
[New kernel syncer9]
[New kernel h2xop-DATA.39]
[New kernel h2xop-DATA.27]
[New kernel h2xop-DATA.15]
[New kernel h2xop-DATA.03]
[New kernel vmdaemon]
[New kernel h2xop-ROOT.39]
[New kernel h2xop-ROOT.27]
[New kernel h2xop-ROOT.15]
[New kernel h2xop-ROOT.03]
[New kernel ithread16 3]
[New kernel usbus1]
[New kernel ithread195 3]
[New kernel ithreadE 3]
[New kernel crypto 3]
[New kernel firmware taskq]
[New kernel sensors 3]
[New kernel netisr 3]
[New kernel taskq_cpu 3]
[New kernel cpuhelper 3]
[New kernel dsched 3]
[New kernel usched 3]
[New kernel usched 3]
[New kernel softclock 3]
[New kernel idle_3]
[New pid 915/120, firefox]
[New pid 915/49, firefox]
[New pid 915/108, firefox]
[New pid 915/4, firefox]
[New pid 915/57, firefox]
[New pid 915/58, firefox]
[New pid 915/63, firefox]
[New pid 901/1, xterm]
[New pid 828/1, getty]
[New pid 703/1, cron]
[New kernel syscons11]
[New kernel syncer8]
[New kernel h2xop-DATA.38]
[New kernel h2xop-DATA.26]
[New kernel h2xop-DATA.14]
[New kernel h2xop-DATA.02]
[New kernel emergpager]
[New kernel h2xop-ROOT.38]
[New kernel h2xop-ROOT.26]
[New kernel h2xop-ROOT.14]
[New kernel h2xop-ROOT.02]
[New kernel usbus1]
[New kernel ithread16 2]
[New kernel ithreadE 2]
[New kernel crypto 2]
[New kernel sensors 2]
[New kernel netisr 2]
[New kernel taskq_cpu 2]
[New kernel disk_msg_core]
[New kernel cpuhelper 2]
[New kernel dsched 2]
[New kernel usched 2]
[New kernel usched 2]
[New kernel softclock 2]
[New kernel idle_2]
[New pid 915/117, firefox]
[New pid 915/41, firefox]
[New pid 915/68, firefox]
[New pid 915/12, firefox]
[New pid 905/1, twm]
[New pid 915/107, firefox]
[New pid 915/109, firefox]
[New pid 915/92, firefox]
[New pid 915/71, firefox]
[New pid 915/37, firefox]
[New kernel syscons10]
[New kernel syncer7]
[New kernel h2xop-DATA.37]
[New kernel h2xop-DATA.25]
[New kernel h2xop-DATA.13]
[New kernel h2xop-DATA.01]
[New kernel swapcached]
[New kernel h2xop-ROOT.37]
[New kernel h2xop-ROOT.25]
[New kernel h2xop-ROOT.13]
[New kernel h2xop-ROOT.01]
[New kernel ithread1 1]
[New kernel ithread17 1]
[New kernel ithread16 1]
[New kernel ithreadE 1]
[New kernel ahci0.5]
[New kernel crypto 1]
[New kernel sensors 1]
[New kernel netisr 1]
[New kernel taskq_cpu 1]
[New kernel cpuhelper 1]
[New kernel devfs_msg_core]
[New kernel dsched 1]
[New kernel usched 1]
[New kernel usched 1]
[New kernel softclock 1]
[New kernel idle_1]
[New pid 915/121, firefox]
[New pid 915/114, firefox]
[New pid 915/22, firefox]
[New pid 915/50, firefox]
[New pid 915/55, firefox]
[New pid 312/1, dhclient]
[New pid 915/83, firefox]
[New pid 915/82, firefox]
[New pid 915/64, firefox]
[New pid 915/45, firefox]
[New pid 915/33, firefox]
[New pid 915/10, firefox]
[New pid 898/1, xinit]
[New pid 882/1, sh]
[New pid 875/1, csh]
[New pid 829/1, getty]
[New pid 827/1, getty]
[New pid 826/1, getty]
[New pid 825/1, getty]
[New pid 824/1, login]
[New kernel syscons9]
[New pid 111/1, adjkerntz]
[New kernel h2xop-DATA.36]
[New kernel h2xop-DATA.24]
[New kernel h2xop-DATA.12]
[New kernel h2xop-DATA.00]
[New kernel /dev/serno/21142]
[New kernel kmalloc_poller]
[New pid 1/1, init]
[New kernel h2xop-ROOT.36]
[New kernel h2xop-ROOT.24]
[New kernel h2xop-ROOT.12]
[New kernel h2xop-ROOT.00]
[New pid 0/1, swapper]
[New kernel kcollect]
[New kernel random]
[New kernel ithread18 0]
[New kernel ithread17 0]
[New kernel ahci0.4]
[New kernel ithread16 0]
[New kernel ithread9 0]
[New kernel acpi_task]
[New kernel crypto 0]
[New kernel sensors 0]
[New kernel netisr 0]
[New kernel taskq_cpu 0]
[New kernel cpuhelper 0]
[New kernel dsched 0]
[New kernel usched 0]
[New kernel usched 0]
[New kernel ithread196 0]
[New kernel ithreadE 0]
[New kernel softclock 0]
[New kernel idle_0]
Reading symbols from /boot/kernel/ehci.ko...done.
Loaded symbols for /boot/kernel/ehci.ko
Reading symbols from /boot/kernel/xhci.ko...done.
Loaded symbols for /boot/kernel/xhci.ko
Reading symbols from /boot/kernel/ums.ko...done.
Loaded symbols for /boot/kernel/ums.ko
Reading symbols from /boot/kernel/nfs.ko...done.
Loaded symbols for /boot/kernel/nfs.ko
Reading symbols from /boot/kernel/snd_hda.ko...done.
Loaded symbols for /boot/kernel/snd_hda.ko
Reading symbols from /boot/kernel/sound.ko...done.
Loaded symbols for /boot/kernel/sound.ko
panic (fmt=0xffffffff80a157be "%s") at /usr/src/sys/kern/kern_shutdown.c:869
869             dumpthread = curthread;
(kgdb) bt
#0  panic (fmt=0xffffffff80a157be "%s")
    at /usr/src/sys/kern/kern_shutdown.c:869
#1  0xffffffff808e6c33 in trap_fatal (frame=0xfffff806ae85ed38, eva=152)
    at /usr/src/sys/platform/pc64/x86_64/trap.c:1100
#2  0xffffffff808e63ea in trap_pfault (frame=0xfffff806ae85ed38, usermode=0)
    at /usr/src/sys/platform/pc64/x86_64/trap.c:923
#3  0xffffffff808e5d49 in trap (frame=0xfffff806ae85ed38)
    at /usr/src/sys/platform/pc64/x86_64/trap.c:629
#4  0xffffffff808a557a in calltrap ()
    at /usr/src/sys/platform/pc64/x86_64/exception.S:319
#5  0xffffffff80453bcd in knote_insert (klist=0x98, kn=0xfffff80274287680)
    at /usr/src/sys/kern/kern_event.c:1848
#6  0xffffffff82675562 in dsp_kqfilter (ap=0xfffff806ae85eea8)
    at /usr/src/sys/dev/sound/sound/../pcm/dsp.c:2232
#7  0xffffffff80440aaa in dev_dkqfilter (dev=0xfffff806ac1b5600, 
    kn=0xfffff80274287680, fp=0xfffff806aa9b0b00)
    at /usr/src/sys/kern/kern_device.c:490
#8  0xffffffff806a087b in devfs_fo_kqfilter (fp=0xfffff806aa9b0b00, 
    kn=0xfffff80274287680) at /usr/src/sys/vfs/devfs/devfs_vnops.c:1505
#9  0xffffffff8045076a in fo_kqfilter (fp=0xfffff806aa9b0b00, 
    kn=0xfffff80274287680) at /usr/src/sys/sys/file2.h:115
#10 0xffffffff80450a3f in filt_fileattach (kn=0xfffff80274287680)
    at /usr/src/sys/kern/kern_event.c:254
#11 0xffffffff804537ee in filter_attach (kn=0xfffff80274287680)
    at /usr/src/sys/kern/kern_event.c:1703
#12 0xffffffff8045289e in kqueue_register (kq=0xfffff80274076a78, 
    kev=0xfffff806ae85f1e8, countp=0xfffff806ae85f5e8)
    at /usr/src/sys/kern/kern_event.c:1293
#13 0xffffffff80451a42 in kern_kevent (kq=0xfffff80274076a78, 
    nevents=2147483647, res=0xfffff806ae85f928, uap=0xfffff806ae85f888, 
    kevent_copyinfn=0xffffffff804da16f <poll_copyin>, 
    kevent_copyoutfn=0xffffffff804da48c <poll_copyout>, 
    tsp_in=0xfffff806ae85f8e8, flags=0) at /usr/src/sys/kern/kern_event.c:830
#14 0xffffffff804dac1f in dopoll (nfds=1, fds=0x7fdfe3885f70, 
    ts=0xfffff806ae85f8e8, res=0xfffff806ae85f928, flags=0)
    at /usr/src/sys/kern/sys_generic.c:1602
#15 0xffffffff804d9f46 in sys_poll (sysmsg=0xfffff806ae85f928, 
    uap=0xfffff806ae85f9f8) at /usr/src/sys/kern/sys_generic.c:1236
#16 0xffffffff808e718f in syscall2 (frame=0xfffff806ae85f9f8)
    at /usr/src/sys/platform/pc64/x86_64/trap.c:1284
#17 0xffffffff808a5d8d in Xfast_syscall ()
    at /usr/src/sys/platform/pc64/x86_64/exception.S:448
#18 0x000000000000002b in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
(kgdb) frame 6
#6  0xffffffff82675562 in dsp_kqfilter (ap=0xfffff806ae85eea8)
    at /usr/src/sys/dev/sound/sound/../pcm/dsp.c:2232
2232                    knote_insert(klist, kn);
(kgdb) p klist
$1 = (struct klist *) 0x98
(kgdb) p bs
$2 = (struct snd_dbuf *) 0x0
(kgdb) p rdch
$3 = (struct pcm_channel *) 0x0
(kgdb) p *wrch
$4 = {methods = 0xfffff800a3a446e0, pid = 915, refcount = 1, 
  feeder = 0xfffff806aa7e7990, align = 0, latency = -1, speed = 48000, 
  format = 2101248, flags = 268439820, feederflags = 35, blocks = 0, 
  direction = 1, interrupts = 0, xruns = 0, feedcount = 0, timeout = 2, 
  bufhard = 0xfffff800a3c343a0, bufsoft = 0xfffff800a3c34480, 
  parentsnddev = 0xfffff800a3c7bc00, parentchannel = 0xfffff8025d2b0bc0, 
  devinfo = 0xfffff800a3af9c40, dev = 0xfffff8025d3ebd00, unit = 1610612742, 
  name = "pcm6:virtual:dsp6.vp0\000\000\000\000\000\000\000\000\000\000", 
  comm = "firefox\000\000r\000\000\000\000\000\000", 
  lock = 0xfffff800a3aa4d40, trigger = 1, intr_cv = {cv_lock = {lock = 0, 
      update = 0}, cv_waiters = 0, cv_desc = 0xffffffff82692615 "pcmwrv"}, 
  inprog = 0, cv = {cv_lock = {lock = 0, update = 0}, cv_waiters = 0, 
    cv_desc = 0xffffffff82692672 "pcmchn"}, lw = 4096, sm = 0x0, children = {
    head = {slh_first = 0x0}, link = {sle_next = 0x0}, busy = {head = {
        slh_first = 0x0}, link = {sle_next = 0x0}}}, channels = {pcm = {
      link = {sle_next = 0xfffff8025d2b0ec0}, busy = {link = {
          sle_next = 0xfffff8025d2b0bc0}}, opened = {link = {
          sle_next = 0x0}}}}, matrix = {id = -3, channels = 2 '\002', 
    ext = 0 '\000', map = {{type = 0, members = 797}, {type = 1, 
        members = 1326}, {type = 18, members = 0}, {type = 0, 
        members = 0} <repeats 16 times>}, mask = 3, 
    offset = "\000\001", '\377' <repeats 16 times>}, volume = {{
      100 <repeats 19 times>}, {45 <repeats 19 times>}, {
      256 <repeats 18 times>, 0}}, data1 = 0x0, data2 = 0x0}
(kgdb) p *kn
$5 = {kn_link = {sle_next = 0x0}, kn_kqlink = {tqe_next = 0x0, 
    tqe_prev = 0xfffff80274076a88}, kn_next = {sle_next = 0x0}, kn_tqe = {
    tqe_next = 0xfffff8027422cc80, tqe_prev = 0xfffff80271e4a7a0}, 
  kn_kq = 0xfffff80274076a78, kn_kevent = {ident = 72, filter = -1, flags = 5, 
    fflags = 0, data = 0, udata = 0x0}, kn_status = 64, 
  kn_sfflags = 100663296, kn_sdata = 0, kn_ptr = {p_fp = 0xfffff806aa9b0b00, 
    p_proc = 0xfffff806aa9b0b00, hookid = -1432679680}, 
  kn_fop = 0xffffffff80cc6540 <file_filtops>, kn_hook = 0xfffff806a9d5e1e0 ""}

