------------[ cut here ]------------
WARNING: CPU: 0 PID: 0 at fs/ext4/page-io.c:205 ext4_add_complete_io fs/ext4/page-io.c:205 [inline]
WARNING: CPU: 0 PID: 0 at fs/ext4/page-io.c:205 ext4_put_io_end_defer+0x2bb/0x3b0 fs/ext4/page-io.c:268
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.128+ #42
 ffff8801db607a48 ffffffff81b2b9e9 ffffffff82a38c20 00000000ffffffff
 0000000000000000 0000000000000000 00000000000000cd ffff8801db607b08
 ffffffff813f6665 0000000041b58ab3 ffffffff82e289c3 ffffffff813f64a6
Call Trace:
 <IRQ> [  401.821823]  [<ffffffff81b2b9e9>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ> [  401.821823]  [<ffffffff81b2b9e9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff813f6665>] panic+0x1bf/0x39f kernel/panic.c:179
 [<ffffffff813f6934>] __warn.cold.9+0xc1/0x17f kernel/panic.c:542
 [<ffffffff810dbc7c>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585
 [<ffffffff816e87ab>] ext4_add_complete_io fs/ext4/page-io.c:205 [inline]
 [<ffffffff816e87ab>] ext4_put_io_end_defer+0x2bb/0x3b0 fs/ext4/page-io.c:268
 [<ffffffff816e89d6>] ext4_end_bio+0x136/0x460 fs/ext4/page-io.c:324
 [<ffffffff81a9eae5>] bio_endio+0x1a5/0x1f0 block/bio.c:1781
 [<ffffffff81abf148>] req_bio_endio block/blk-core.c:157 [inline]
 [<ffffffff81abf148>] blk_update_request+0x248/0x9b0 block/blk-core.c:2628
 [<ffffffff81e04f3d>] scsi_end_request+0x9d/0x5c0 drivers/scsi/scsi_lib.c:606
 [<ffffffff81e0df43>] scsi_io_completion+0x273/0x17a0 drivers/scsi/scsi_lib.c:829
 [<ffffffff81df0e6a>] scsi_finish_command+0x3ba/0x530 drivers/scsi/scsi.c:607
 [<ffffffff81e0c470>] scsi_softirq_done+0x250/0x360 drivers/scsi/scsi_lib.c:1567
 [<ffffffff81add00d>] blk_done_softirq+0x27d/0x3e0 block/blk-softirq.c:35
 [<ffffffff827fd140>] __do_softirq+0x210/0x940 kernel/softirq.c:288
 [<ffffffff810ef974>] invoke_softirq kernel/softirq.c:368 [inline]
 [<ffffffff810ef974>] irq_exit+0x114/0x150 kernel/softirq.c:409
 [<ffffffff827fa15d>] exiting_irq arch/x86/include/asm/apic.h:669 [inline]
 [<ffffffff827fa15d>] do_IRQ+0x10d/0x1c0 arch/x86/kernel/irq.c:252
 [<ffffffff827f875d>] common_interrupt+0x9d/0x9d arch/x86/entry/entry_64.S:461
 <EOI> [  402.009953]  [<ffffffff827f6a56>] ? native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:56
 [<ffffffff827f5fb5>] arch_safe_halt arch/x86/include/asm/paravirt.h:104 [inline]
 [<ffffffff827f5fb5>] default_idle+0x55/0x360 arch/x86/kernel/process.c:437
 [<ffffffff81068640>] arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:428
 [<ffffffff827f6eb5>] default_idle_call+0x45/0x60 kernel/sched/idle.c:97
 [<ffffffff811f04f5>] cpuidle_idle_call kernel/sched/idle.c:155 [inline]
 [<ffffffff811f04f5>] cpu_idle_loop kernel/sched/idle.c:248 [inline]
 [<ffffffff811f04f5>] cpu_startup_entry+0x2b5/0x380 kernel/sched/idle.c:303
 [<ffffffff827e54ac>] rest_init+0x183/0x189 init/main.c:409
 [<ffffffff8341991b>] start_kernel+0x5fb/0x62f init/main.c:664
 [<ffffffff8341829a>] x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:196
 [<ffffffff834183d6>] x86_64_start_kernel+0x13a/0x15d arch/x86/kernel/head64.c:177
Kernel Offset: disabled
Rebooting in 86400 seconds..