login: tap0: MAC address: 00:bd:10:08:00:00
panic: overflowed mbuf 0xfffff80117e0c400
cpuid = 4
Trace beginning at frame 0xfffff80118263738
SECONDARY PANIC ON CPU 0 THREAD 0xffffmf8008babf000
_free() at m_free+0x351 0xffffffff806bdff1 
m_free() at m_free+0x351 0xffffffff806bdff1 
m_freem() at m_freem+0x15 0xffffffff806be265 
sosendtcp() at sosendtcp+0x5e0 0xffffffff806c5540 
soo_write() at soo_write+0x70 0xffffffff806b0190 
kern_pwritev() at kern_pwritev+0xf2 0xffffffff806a7842 
Debugger("panic")

CPU4 stopping CPUs: 0x0000002f
 stopped
Stopped at      Debugger+0x7c:  movb    $0,0xbdaf09(%rip)