panic: sbfree: m 0xfffff800128c9c00 !M_NOTREADY cpuid = 0 time = 232 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe001faac4c0 vpanic() at vpanic+0x1e0/frame 0xfffffe001faac520 panic() at panic+0x43/frame 0xfffffe001faac580 sbfree() at sbfree+0x1f4/frame 0xfffffe001faac5c0 sbcut_internal() at sbcut_internal+0xf0/frame 0xfffffe001faac610 sbrelease_internal() at sbrelease_internal+0x9c/frame 0xfffffe001faac650 sofree() at sofree+0x492/frame 0xfffffe001faac6b0 soclose() at soclose+0x5b3/frame 0xfffffe001faac730 _fdrop() at _fdrop+0x3a/frame 0xfffffe001faac760 closef() at closef+0x27d/frame 0xfffffe001faac7f0 fdescfree_fds() at fdescfree_fds+0xbd/frame 0xfffffe001faac840 fdescfree() at fdescfree+0x58a/frame 0xfffffe001faac900 exit1() at exit1+0x780/frame 0xfffffe001faac970 sys_sys_exit() at sys_sys_exit+0xd/frame 0xfffffe001faac980 amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe001faacab0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe001faacab0 --- syscall (1, FreeBSD ELF64, sys_sys_exit), rip = 0x44f32a, rsp = 0x7fffffffec58, rbp = 0x1 --- KDB: enter: panic [ thread pid 2626 tid 100997 ] Stopped at kdb_enter+0x6a: movq $0,kdb_why