panic: complete IP header not in one mbuf
cpuid = 0
Trace beginning at frame 0xfffff8008d1f89d0
ip_input() at ip_input+0xd61 0xffffffff807b1731 
ip_input() at ip_input+0xd61 0xffffffff807b1731 
netmsg_service_loop() at netmsg_service_loop+0xe9 0xffffffff807464a9 
Debugger("panic")

CPU0 stopping CPUs: 0x0000003e
 stopped
Stopped at      Debugger+0x7c:  movb    $0,0xbdaf09(%rip)
db>