bhyve tty / login problems / panic

Dan Mack mack at
Thu Mar 28 20:58:31 UTC 2013

I haven't spent too much time debugging this yet but I'd thought I'd ask 
just in case someone else has seen this:

  - fresh 10.x system (248804) , standard FreeBSD iso image I made with
    make release

  - latest release.iso ...
  - install went okay, everything seemed normal

  - boot splash screen comes up fine, select default and do first boot

  - cannot login ... first few attempts result in 'login timed out 
messages' (but they get emitted as soon as I hit CR)

  - eventually I can get in after a few tries but then the shell 
immediately boots me after emitting the motd  :-)

  - and just leaving it sit results in panic

  - my kernel is mainly just GENERIC with the debugging yanked out and 
raid, scsi, and wifi devices.

Any ideas?

Below is the boot log and what I saw ...
GDB: no debug ports present
KDB: debugger backends: ddb
KDB: current backend: ddb
Copyright (c) 1992-2013 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
         The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 10.0-CURRENT #4 r248804: Wed Mar 27 19:29:38 CDT 2013
     root at amd64
FreeBSD clang version 3.2 (tags/RELEASE_32/final 170710) 20121221
CPU: Intel(R) Core(TM) i7-3930K CPU @ 3.20GHz (3199.83-MHz K8-class CPU)
   Origin = "GenuineIntel"  Id = 0x206d7  Family = 0x6  Model = 0x2d 
Stepping = 7


   AMD Features=0x2c100800<SYSCALL,NX,Page1GB,RDTSCP,LM>
   AMD Features2=0x1<LAHF>
   TSC: P-state invariant
real memory  = 536870912 (512 MB)
avail memory = 482803712 (460 MB)
Event timer "LAPIC" quality 400
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
FreeBSD/SMP: 2 package(s) x 1 core(s)
  cpu0 (BSP): APIC ID:  0
login: /amd64 ( (console)ds.KLOCAL>ic 0 mtu 
1500tation)3fff at device 2.0 on pci0i0

FreeBSD/amd64 ( (console)

login: root
Login timed out after 300 seconds

FreeBSD/amd64 ( (console)

login: root
Login timed out after 300 seconds

FreeBSD/amd64 ( (console)

login: root
Login timed out after 300 seconds

FreeBSD/amd64 ( (console)

login: root
Login timed out after 300 seconds

FreeBSD/amd64 ( (console)

login: root
Jul 12 07:12:58 cocopuff login: ROOT LOGIN (root) ON console
FreeBSD 10.0-CURRENT (MACKGEN) #4 r248804: Wed Mar 27 19:29:38 CDT 2013

Welcome to FreeBSD!

Before seeking technical support, please use the following resources:

o  Security advisories and updated errata information for all releases are
    at - always consult the ERRATA section
    for your release first as it's updated frequently.

o  The Handbook and FAQ documents are at and,
    along with the mailing lists, can be searched by going to  If the doc package has been installed
    (or fetched via pkg install lang-freebsd-doc, where lang is the
    2-letter language code, e.g. en), they are also available formatted

If you still have a question or problem, please take the output of
`uname -a', along with any relevant error messages, and email it
as a question to the questions at mailing list.  If you are
unfamiliar with FreeBSD's directory layout, please refer to the hier(7)
manual page.  If you are not familiar with manual pages, type `man man'.

Edit /etc/motd to change this login announcement.

You have new mail.
You have new mail.
root at cocopuff:~ # auto-logout

FreeBSD/amd64 ( (console)

login: panic: deadlkres: possible deadlock detected for 
0xfffffe001c919920, blocked for 303081 ticks

cpuid = 0
KDB: enter: panic
[ thread pid 0 tid 100027 ]
Stopped at      kdb_enter+0x3e: movq    $0,kdb_why
db> bt
Tracing pid 0 tid 100027 td 0xfffffe000358f490
kdb_enter() at kdb_enter+0x3e/frame 0xffffff80002bcae0
panic() at panic+0x176/frame 0xffffff80002bcb60
deadlkres() at deadlkres+0x488/frame 0xffffff80002bcbb0
fork_exit() at fork_exit+0x9a/frame 0xffffff80002bcbf0
fork_trampoline() at fork_trampoline+0xe/frame 0xffffff80002bcbf0
--- trap 0, rip = 0, rsp = 0xffffff80002bccb0, rbp = 0 ---

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