I'm trying to run one of my older VM's and get the crash below in the VM
when trying to boot...

This happens both on an older BSD:
FreeBSD 11.0-CURRENT (FREETEST) #1 r273066M: Sun Oct 19 00:59:06 CEST 2014
As well as on a very recent:
FreeBSD 11.0-CURRENT (BHYVE00) #0 r274490M: Fri Nov 14 02:42:43 CET 2014

The older 10.0 VM's do boot normally

Any suggestions on what this might be, and/or how to debug this..


DHCPDISCOVER on vtnet0 to port 67 interval 3
DHCPREQUEST on vtnet0 to port 67
panic: ffs_write: type 0xfffff8000565dce8 0 (0,62)
cpuid = 0
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame
kdb_backtrace() at kdb_backtrace+0x39/frame 0xfffffe0097537580
vpanic() at vpanic+0x126/frame 0xfffffe00975375c0
panic() at panic+0x43/frame 0xfffffe0097537620
ffs_write() at ffs_write+0x68b/frame 0xfffffe00975376c0
VOP_WRITE_APV() at VOP_WRITE_APV+0x16f/frame 0xfffffe00975377d0
vn_write() at vn_write+0x2f3/frame 0xfffffe0097537860
vn_io_fault() at vn_io_fault+0x17b/frame 0xfffffe00975379f0
dofilewrite() at dofilewrite+0x88/frame 0xfffffe0097537a40
kern_writev() at kern_writev+0x68/frame 0xfffffe0097537a90
sys_write() at sys_write+0x63/frame 0xfffffe0097537ae0
amd64_syscall() at amd64_syscall+0x25a/frame 0xfffffe0097537bf0
Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe0097537bf0
--- syscall (4, FreeBSD ELF64, sys_write), rip = 0x800de9b4a, rsp =
0x7fffffffd4c8, rbp = 0x7fffffffd510 ---
KDB: enter: panic
[ thread pid 551 tid 100057 ]
Stopped at      kdb_enter+0x3e: movq    $0,kdb_why

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