Warning: Permanently added '10.128.0.145' (ECDSA) to the list of known hosts. executing program executing program executing program dev = gpt/rootfs, block = 405832, fs = / panic: ffs_blkfree_cg: freeing free block cpuid = 0 time = 1552872502 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0020dfc150 vpanic() at vpanic+0x1e0/frame 0xfffffe0020dfc1b0 panic() at panic+0x43/frame 0xfffffe0020dfc210 ffs_blkfree_cg() at ffs_blkfree_cg+0x6e9/frame 0xfffffe0020dfc2d0 ffs_blkfree() at ffs_blkfree+0x15e/frame 0xfffffe0020dfc350 ffs_indirtrunc() at ffs_indirtrunc+0x724/frame 0xfffffe0020dfc450 ffs_indirtrunc() at ffs_indirtrunc+0x856/frame 0xfffffe0020dfc530 ffs_truncate() at ffs_truncate+0x17c3/frame 0xfffffe0020dfc720 ufs_setattr() at ufs_setattr+0x918/frame 0xfffffe0020dfc7c0 VOP_SETATTR_APV() at VOP_SETATTR_APV+0xc2/frame 0xfffffe0020dfc7f0 vn_truncate() at vn_truncate+0x23f/frame 0xfffffe0020dfc930 kern_ftruncate() at kern_ftruncate+0x13b/frame 0xfffffe0020dfc980 amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe0020dfcab0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0020dfcab0 --- syscall (0, FreeBSD ELF64, nosys), rip = 0x42132a, rsp = 0x7fffffffea88, rbp = 0x2 --- KDB: enter: panic [ thread pid 762 tid 100093 ] Stopped at kdb_enter+0x6a: movq $0,kdb_why