panic: udp_output: shared udbinfo lock, excl inp lock
cpuid = 1
time = 1558261742
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe002112b550
vpanic() at vpanic+0x1e0/frame 0xfffffe002112b5b0
panic() at panic+0x43/frame 0xfffffe002112b610
udp_send() at udp_send+0x139c/frame 0xfffffe002112b730
sosend_dgram() at sosend_dgram+0x550/frame 0xfffffe002112b7a0
sosend() at sosend+0xc6/frame 0xfffffe002112b810
kern_sendit() at kern_sendit+0x35e/frame 0xfffffe002112b8c0
sendit() at sendit+0x226/frame 0xfffffe002112b920
sys_sendmsg() at sys_sendmsg+0x8b/frame 0xfffffe002112b980
amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe002112bab0
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe002112bab0
--- syscall (198, FreeBSD ELF64, nosys), rip = 0x41309a, rsp = 0x7fffdfffdf38, rbp = 0x3 ---
KDB: enter: panic
[ thread pid 21428 tid 101145 ]
Stopped at      kdb_enter+0x6a: movq    $0,kdb_why