Warning: Permanently added '10.128.0.18' (ECDSA) to the list of known hosts. executing program login: vm_object_vndeallocate 0xfffff800124fd000: tag ufs, type VREG usecount 2, writecount 1, refcount 2 flags (VI_ACTIVE) v_object 0xfffff80012506e00 ref 0 pages 0 cleanbuf 0 dirtybuf 0 lock type ufs: UNLOCKED nlink=1, effnlink=1, size=0, extsize 0 generation=bafe7843, uid=0, gid=0, flags=0x0 ino 197775, on dev gpt/rootfs panic: vm_object_vndeallocate: bad object reference count cpuid = 0 time = 1557776286 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe00212046f0 vpanic() at vpanic+0x1e0/frame 0xfffffe0021204750 panic() at panic+0x43/frame 0xfffffe00212047b0 vm_object_collapse() at vm_object_collapse/frame 0xfffffe0021204810 vn_mmap() at vn_mmap+0x2e3/frame 0xfffffe0021204890 kern_mmap() at kern_mmap+0x8a8/frame 0xfffffe0021204950 sys_mmap() at sys_mmap+0x38/frame 0xfffffe0021204980 amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe0021204ab0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0021204ab0 --- syscall (0, FreeBSD ELF64, nosys), rip = 0x41c32a, rsp = 0x7fffffffead8, rbp = 0x7fffffffeb40 --- KDB: enter: panic [ thread pid 759 tid 100095 ] Stopped at kdb_enter+0x6a: movq $0,kdb_why