panic: m_uiotombuf: progress != total cpuid = 0 time = 1199 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe00212db370 vpanic() at vpanic+0x1e0/frame 0xfffffe00212db3d0 panic() at panic+0x43/frame 0xfffffe00212db430 m_uiotombuf() at m_uiotombuf+0x2b5/frame 0xfffffe00212db490 sctp_lower_sosend() at sctp_lower_sosend+0x5099/frame 0xfffffe00212db670 sctp_sosend() at sctp_sosend+0x510/frame 0xfffffe00212db7a0 sosend() at sosend+0xc6/frame 0xfffffe00212db810 kern_sendit() at kern_sendit+0x35e/frame 0xfffffe00212db8c0 sendit() at sendit+0x226/frame 0xfffffe00212db920 sys_sendto() at sys_sendto+0x5c/frame 0xfffffe00212db980 amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe00212dbab0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe00212dbab0 --- syscall (198, FreeBSD ELF64, nosys), rip = 0x412e5a, rsp = 0x7fffdffdcf38, rbp = 0x6 --- KDB: enter: panic [ thread pid 6408 tid 100938 ] Stopped at kdb_enter+0x6a: movq $0,kdb_why