panic: sbflush_internal: ccc 0 mb 0 mbcnt 512 cpuid = 1 time = 1557751569 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe00212e5730 vpanic() at vpanic+0x1e0/frame 0xfffffe00212e5790 panic() at panic+0x43/frame 0xfffffe00212e57f0 sbrelease_internal() at sbrelease_internal+0x174/frame 0xfffffe00212e5830 solisten_proto() at solisten_proto+0xc6/frame 0xfffffe00212e5890 sctp_listen() at sctp_listen+0x4eb/frame 0xfffffe00212e5900 solisten() at solisten+0x7a/frame 0xfffffe00212e5940 kern_listen() at kern_listen+0x132/frame 0xfffffe00212e5980 amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe00212e5ab0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe00212e5ab0 --- syscall (198, FreeBSD ELF64, nosys), rip = 0x41309a, rsp = 0x7fffdfffdf38, rbp = 0x2 --- KDB: enter: panic [ thread pid 1104 tid 100859 ] Stopped at kdb_enter+0x6a: movq $0,kdb_why db>