panic: ffs_blkfree_cg: freeing free block cpuid = 0 time = 1905 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe001f5b64e0 vpanic() at vpanic+0x1e0/frame 0xfffffe001f5b6540 panic() at panic+0x43/frame 0xfffffe001f5b65a0 ffs_blkfree_cg() at ffs_blkfree_cg+0x6e9/frame 0xfffffe001f5b6660 ffs_blkfree() at ffs_blkfree+0x15e/frame 0xfffffe001f5b66e0 indir_trunc() at indir_trunc+0x8e5/frame 0xfffffe001f5b67e0 indir_trunc() at indir_trunc+0x5d6/frame 0xfffffe001f5b68c0 handle_workitem_freeblocks() at handle_workitem_freeblocks+0x2d7/frame 0xfffffe001f5b6930 process_worklist_item() at process_worklist_item+0x34a/frame 0xfffffe001f5b69c0 softdep_process_worklist() at softdep_process_worklist+0xea/frame 0xfffffe001f5b6a10 softdep_flush() at softdep_flush+0x134/frame 0xfffffe001f5b6a60 fork_exit() at fork_exit+0xb0/frame 0xfffffe001f5b6ab0 fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe001f5b6ab0 --- trap 0, rip = 0, rsp = 0, rbp = 0 --- KDB: enter: panic [ thread pid 19 tid 100079 ] Stopped at kdb_enter+0x6a: movq $0,kdb_why