44-fwm_tx[3]: fc0=d0 len=65
45-fwm: inject HWMP PREQ origseq=0 targ=bc TO (proactive PREP to zero nexthop)
46:panic: null node
47-cpuid = 0
48-Trace beginning at frame 0xfffff80117b971c8
49-hwmp_send_action() at hwmp_send_action+0x4ee 0xffffffff80769a0e 
50-hwmp_send_action() at hwmp_send_action+0x4ee 0xffffffff80769a0e 
51-hwmp_recv_action_meshpath() at hwmp_recv_action_meshpath+0x1328 0xffffffff8076b738 
52-mesh_recv_mgmt() at mesh_recv_mgmt+0x6d8 0xffffffff80777358 
53-mesh_input() at mesh_input+0x68d 0xffffffff807799cd 
54-ieee80211_input_mimo() at ieee80211_input_mimo+0x156 0xffffffff8076c766 
55-Debugger("panic")
56-
57-CPU0 stopping CPUs: 0x0000003e
58- stopped
59-Stopped at      Debugger+0x7c:  movb    $0,0xbdaf09(%rip)
60-db>