WARNING: CPU: 1 PID: 0 at fs/ext4/page-io.c:206 ext4_add_complete_io fs/ext4/page-io.c:206 [inline]
WARNING: CPU: 1 PID: 0 at fs/ext4/page-io.c:206 ext4_put_io_end_defer+0x43c/0x560 fs/ext4/page-io.c:269
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.19.0-rc6-next-20181002+ #85
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d3/0x2c4 lib/dump_stack.c:113
 panic+0x238/0x4e7 kernel/panic.c:184
 __warn.cold.8+0x163/0x1ba kernel/panic.c:536
 report_bug+0x254/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969
RIP: 0010:ext4_add_complete_io fs/ext4/page-io.c:206 [inline]
RIP: 0010:ext4_put_io_end_defer+0x43c/0x560 fs/ext4/page-io.c:269
Code: 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 2a 01 00 00 49 83 bf e0 02 00 00 00 0f 84 d8 fd ff ff e8 14 51 5c ff <0f> 0b e9 cc fd ff ff e8 78 3f a0 ff e9 81 fc ff ff 48 89 b5 30 ff
RSP: 0018:ffff8801daf07108 EFLAGS: 00010006
RAX: ffff8801d9af2340 RBX: ffff880181cce120 RCX: ffffffff82211907
RDX: 0000000000010000 RSI: ffffffff82211c2c RDI: ffff8801c9ff0e60
RBP: ffff8801daf071f8 R08: ffff8801d9af2340 R09: ffffed0030399c29
R10: ffffed0030399c29 R11: ffff880181cce14f R12: 1ffff1003b5e0e26
R13: ffff8801ccabc530 R14: ffff8801daf071d0 R15: ffff8801c9ff0b80
 ext4_end_bio+0x243/0x6e0 fs/ext4/page-io.c:335
 bio_endio+0x5ca/0xb60 block/bio.c:1775
 req_bio_endio block/blk-core.c:278 [inline]
 blk_update_request+0x3b8/0xcb0 block/blk-core.c:3075
 scsi_end_request+0xde/0x860 drivers/scsi/scsi_lib.c:673
 scsi_io_completion+0x2ce/0x1ca0 drivers/scsi/scsi_lib.c:1093
 scsi_finish_command+0x579/0x970 drivers/scsi/scsi.c:248
 scsi_softirq_done+0x465/0x520 drivers/scsi/scsi_lib.c:1737
 __blk_mq_complete_request block/blk-mq.c:586 [inline]
 blk_mq_complete_request+0x2c2/0x550 block/blk-mq.c:623
 scsi_mq_done+0x108/0x460 drivers/scsi/scsi_lib.c:2048
 virtscsi_complete_cmd+0x573/0x740 drivers/scsi/virtio_scsi.c:207
 virtscsi_vq_done+0xcb/0x180 drivers/scsi/virtio_scsi.c:223
 virtscsi_req_done+0xa7/0xd0 drivers/scsi/virtio_scsi.c:238
 vring_interrupt+0x128/0x170 drivers/virtio/virtio_ring.c:950
 __handle_irq_event_percpu+0x1e1/0xaf0 kernel/irq/handle.c:149
 handle_irq_event_percpu+0xa0/0x1d0 kernel/irq/handle.c:189
 handle_irq_event+0xa7/0x135 kernel/irq/handle.c:206
 handle_edge_irq+0x227/0x880 kernel/irq/chip.c:791
 generic_handle_irq_desc include/linux/irqdesc.h:154 [inline]
 handle_irq+0x252/0x3d8 arch/x86/kernel/irq_64.c:78
 do_IRQ+0x98/0x1c0 arch/x86/kernel/irq.c:246
 common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:582
 </IRQ>
RIP: 0010:native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:57
Code: 45 d8 e8 6d c4 0b fa 48 8b 45 d8 e9 ca fe ff ff 48 89 df e8 5c c4 0b fa eb 82 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 fb f4 <5d> c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 f4 5d c3 90 90 90 90 90
RSP: 0018:ffff8801d9b07c30 EFLAGS: 00000282 ORIG_RAX: ffffffffffffffdb
RAX: dffffc0000000000 RBX: 1ffff1003b360f8a RCX: ffffffff81837c7a
RDX: 1ffffffff1263e81 RSI: ffffffff81837c94 RDI: ffffffff8931f408
RBP: ffff8801d9b07c30 R08: ffff8801d9af2340 R09: ffffed003b5e5b4f
R10: ffffed003b5e5b4f R11: ffff8801daf2da7b R12: ffff8801d9b07cf0
R13: ffffffff89f280a0 R14: 0000000000000000 R15: 0000000000000001
 arch_safe_halt arch/x86/include/asm/paravirt.h:151 [inline]
 default_idle+0xbf/0x490 arch/x86/kernel/process.c:498
 arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:489
 default_idle_call+0x6d/0x90 kernel/sched/idle.c:93
 cpuidle_idle_call kernel/sched/idle.c:153 [inline]
 do_idle+0x3db/0x5b0 kernel/sched/idle.c:262
 cpu_startup_entry+0x10c/0x120 kernel/sched/idle.c:368
 start_secondary+0x447/0x5f0 arch/x86/kernel/smpboot.c:271
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243
Kernel Offset: disabled
Rebooting in 86400 seconds..