panic: udp_output: shared udbinfo lock, excl inp lock cpuid = 1 time = 32 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe00212cc560 vpanic() at vpanic+0x1e0/frame 0xfffffe00212cc5c0 panic() at panic+0x43/frame 0xfffffe00212cc620 udp_send() at udp_send+0x1377/frame 0xfffffe00212cc730 sosend_dgram() at sosend_dgram+0x550/frame 0xfffffe00212cc7a0 sosend() at sosend+0xc6/frame 0xfffffe00212cc810 kern_sendit() at kern_sendit+0x35e/frame 0xfffffe00212cc8c0 sendit() at sendit+0x226/frame 0xfffffe00212cc920 sys_sendmsg() at sys_sendmsg+0x8b/frame 0xfffffe00212cc980 amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe00212ccab0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe00212ccab0 --- syscall (198, FreeBSD ELF64, nosys), rip = 0x412f9a, rsp = 0x7fffdfffdf38, rbp = 0x3 --- KDB: enter: panic [ thread pid 1085 tid 100633 ] Stopped at kdb_enter+0x6a: movq $0,kdb_why