::status
debugging crash dump vmcore.3 (64-bit) from dp35dp
operating system: 5.11 snv_83 (i86pc)
panic message: 
BAD TRAP: type=e (#pf Page fault) rp=ffffff000842ca00 addr=7f83ac598 occurred in module "zyd" due to a NULL pointer dereference
dump content: kernel pages only
> ::stack
zyd_plcp_signal+0x18()
zyd_hw_send_frame+0x337()
zyd_send+0x4f()
zyd_m_tx+0x72()
dls_tx+0x1d(ffffff01cf267c80, ffffff01d4c37cc0)
dld_tx_single+0x2a(ffffff01cacc58c8, ffffff01d4c37cc0)
str_mdata_fastpath_put+0x7f(ffffff01cacc58c8, ffffff01d4c37cc0)
dld_wput+0x75(ffffff01d442f8d0, ffffff01d4c37cc0)
putnext+0x22b(ffffff01d442f640, ffffff01d4c37cc0)
ip_xmit_v4+0x318(ffffff01d4cf2cc0, ffffff01d4424158, 0, 1)
ip_wput_ire+0x21a9(ffffff01cf721e20, ffffff01d4cf2cc0, ffffff01d4424158, ffffff01d440ce40, 2, 0)
ip_output_options+0xdbe(ffffff01d440ce40, ffffff01d4cf2cc0, ffffff01cf721e20, 2, fffffffffbd18f60)
ip_output+0x24(ffffff01d440ce40, ffffff01d4cf2cc0, ffffff01cf721e20, 2)
tcp_send_data+0x180(ffffff01d440d040, ffffff01cf721e20, ffffff01d4cf2cc0)
tcp_send+0xa78(ffffff01cf721e20, ffffff01d440d040, 5b4, 28, 14, 0)
tcp_wput_data+0x774(ffffff01d440d040, 0, 0)
tcp_rput_data+0x2bdf(ffffff01d440ce40, ffffff01d4c37cc0, ffffff01c8b18e40)
tcp_input+0x4a(ffffff01d440ce40, ffffff01d4c37cc0, ffffff01c8b18e40)
squeue_enter_chain+0x11d(ffffff01c8b18e40, ffffff01d4c37cc0, ffffff01d4c37cc0, 1, 1)
ip_input+0x987(ffffff01d3385328, 0, ffffff01d4c37cc0, 0)
ip_rput+0x4c(ffffff01d442f548, ffffff01d4c37cc0)
putnext+0x22b(ffffff01d442f7d8, ffffff01d4c37cc0)
dld_str_rx_fastpath+0x90(ffffff01cacc58c8, 0, ffffff01d4c37cc0, ffffff000842d860)
i_dls_link_rx+0x2b5(ffffff01cab90c68, 0, ffffff01d4c37cc0)
mac_do_rx+0xb9(ffffff01c9726ad8, 0, ffffff01d4c37cc0, 0)
mac_rx+0x1b(ffffff01c9726ad8, 0, ffffff01d4c37cc0)
ieee80211_input+0x5a5(ffffff01d0804120, ffffff01d4c37cc0, ffffff01d442bac0, 6c, 0)
zyd_receive+0x106()
data_in_cb+0x164()
usba_req_normal_cb+0x145(ffffff01d4214e08)
hcdi_do_cb+0x157(ffffff01c968bc00, ffffff01d4214e08, ffffff01c80218c8)
hcdi_cb_thread+0xb8(ffffff01c968bc00)
taskq_thread+0x1a7(ffffff01c97452b0)
thread_start+8()
> ::stackregs
ffffff000842caf0 zyd_plcp_signal+0x18()
ffffff000842cb90 zyd_hw_send_frame+0x337()
ffffff000842cbd0 zyd_send+0x4f()
ffffff000842cc10 zyd_m_tx+0x72()
ffffff000842cc30 dls_tx+0x1d(ffffff01cf267c80, ffffff01d4c37cc0)
ffffff000842cc60 dld_tx_single+0x2a(ffffff01cacc58c8, ffffff01d4c37cc0)
ffffff000842cc90 str_mdata_fastpath_put+0x7f(ffffff01cacc58c8, ffffff01d4c37cc0)
ffffff000842ccd0 dld_wput+0x75(ffffff01d442f8d0, ffffff01d4c37cc0)
ffffff000842cd40 putnext+0x22b(ffffff01d442f640, ffffff01d4c37cc0)
ffffff000842cdc0 ip_xmit_v4+0x318(ffffff01d4cf2cc0, ffffff01d4424158, 0, 1)
ffffff000842cfe0 ip_wput_ire+0x21a9(ffffff01cf721e20, ffffff01d4cf2cc0, ffffff01d4424158, ffffff01d440ce40, 2, 0)
ffffff000842d0c0 ip_output_options+0xdbe(ffffff01d440ce40, ffffff01d4cf2cc0, ffffff01cf721e20, 2, fffffffffbd18f60)
ffffff000842d0f0 ip_output+0x24(ffffff01d440ce40, ffffff01d4cf2cc0, ffffff01cf721e20, 2)
ffffff000842d1e0 tcp_send_data+0x180(ffffff01d440d040, ffffff01cf721e20, ffffff01d4cf2cc0)
ffffff000842d310 tcp_send+0xa78(ffffff01cf721e20, ffffff01d440d040, 5b4, 28, 14, 0, ffffff000842d3cc, ffffff000842d3d0, ffffff000842d3d4, 
ffffff000842d388, 167af, 7fffffff)
ffffff000842d3f0 tcp_wput_data+0x774(ffffff01d440d040, 0, 0)
ffffff000842d550 tcp_rput_data+0x2bdf(ffffff01d440ce40, ffffff01d4c37cc0, ffffff01c8b18e40)
ffffff000842d590 tcp_input+0x4a(ffffff01d440ce40, ffffff01d4c37cc0, ffffff01c8b18e40)
ffffff000842d610 squeue_enter_chain+0x11d(ffffff01c8b18e40, ffffff01d4c37cc0, ffffff01d4c37cc0, 1, 1)
ffffff000842d710 ip_input+0x987(ffffff01d3385328, 0, ffffff01d4c37cc0, 0)
ffffff000842d730 ip_rput+0x4c(ffffff01d442f548, ffffff01d4c37cc0)
ffffff000842d7a0 putnext+0x22b(ffffff01d442f7d8, ffffff01d4c37cc0)
ffffff000842d7f0 dld_str_rx_fastpath+0x90(ffffff01cacc58c8, 0, ffffff01d4c37cc0, ffffff000842d860)
ffffff000842d8d0 i_dls_link_rx+0x2b5(ffffff01cab90c68, 0, ffffff01d4c37cc0)
ffffff000842d950 mac_do_rx+0xb9(ffffff01c9726ad8, 0, ffffff01d4c37cc0, 0)
ffffff000842d980 mac_rx+0x1b(ffffff01c9726ad8, 0, ffffff01d4c37cc0)
ffffff000842da20 ieee80211_input+0x5a5(ffffff01d0804120, ffffff01d4c37cc0, ffffff01d442bac0, 6c, 0)
ffffff000842da80 zyd_receive+0x106()
ffffff000842dad0 data_in_cb+0x164()
ffffff000842db20 usba_req_normal_cb+0x145(ffffff01d4214e08)
ffffff000842db80 hcdi_do_cb+0x157(ffffff01c968bc00, ffffff01d4214e08, ffffff01c80218c8)
ffffff000842dbd0 hcdi_cb_thread+0xb8(ffffff01c968bc00)
ffffff000842dc60 taskq_thread+0x1a7(ffffff01c97452b0)
ffffff000842dc70 thread_start+8()