panic: vm_fault_hold: fault on nofault entry, addr: 0xe00000000a770000 cpuid = 40 time = 1540424138 KDB: stack backtrace: 0xe0000000a73969d0: at .kdb_backtrace+0x5c 0xe0000000a7396b00: at .vpanic+0x1b4 0xe0000000a7396bc0: at .panic+0x38 0xe0000000a7396c50: at .vm_fault_hold+0x1a0 0xe0000000a7396e70: at .vm_fault+0x94 0xe0000000a7396f20: at .cpu_fetch_syscall_args+0x404 0xe0000000a7396fd0: at .trap+0xf28 0xe0000000a7397190: at .powerpc_interrupt+0x290 0xe0000000a7397230: kernel DSI write trap @ 0xe00000000a770000 by .memcpy+0x98: srr1=0x9000000000009032 r1=0xe0000000a73974e0 cr=0x42000088 xer=0 ctr=0x200 r2=0xc00000000377f900 sr=0x42000000 0xe0000000a73974e0: at 0xc0000000032b06c4 0xe0000000a7397520: at 0xc00000004602dffc 0xe0000000a73975c0: at .nvme_qpair_submit_tracker+0x3ac 0xe0000000a7397660: at .nvme_qpair_process_completions+0x114 0xe0000000a7397700: at .nvme_qpair_process_completions+0x368 0xe0000000a7397780: at .intr_event_handle+0x4b8 0xe0000000a7397860: at .fork_exit+0xd0 0xe0000000a7397900: at .fork_trampoline+0x10 0xe0000000a7397930: at -0x4 KDB: enter: panic [ thread pid 12 tid 100211 ] Stopped at .kdb_enter+0x60: ld r2, r1, 0x28 db>