WARNING: CPU: 1 PID: 10171 at fs/ext4/page-io.c:206 ext4_add_complete_io fs/ext4/page-io.c:206 [inline]
WARNING: CPU: 1 PID: 10171 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: 10171 Comm: syz-executor1 Not tainted 4.19.0-rc7-next-20181012+ #93
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+0x244/0x3ab 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
kobject: 'loop0' (00000000146e593e): kobject_uevent_env
 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 f4 ce 5a ff <0f> 0b e9 cc fd ff ff e8 f8 55 9f ff e9 81 fc ff ff 48 89 b5 30 ff
kobject: 'loop0' (00000000146e593e): fill_kobj_path: path = '/devices/virtual/block/loop0'
RSP: 0018:ffff8801daf072a0 EFLAGS: 00010206
RAX: ffff8801bfc2e200 RBX: ffff88014d2b37e0 RCX: ffffffff82239837
RDX: 0000000000000100 RSI: ffffffff82239b5c RDI: ffff8801c9feae20
RBP: ffff8801daf07390 R08: ffff8801bfc2e200 R09: ffffed0029a56701
R10: ffffed0029a56701 R11: ffff88014d2b380f R12: 1ffff1003b5e0e59
R13: ffff880177d5f630 R14: ffff8801daf07368 R15: ffff8801c9feab40
 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+0x580/0xd20 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_done_softirq+0x4c2/0x760 block/blk-softirq.c:37
 __do_softirq+0x30d/0xb26 kernel/softirq.c:292
bridge0: port 1(bridge_slave_0) entered disabled state
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x17f/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 do_IRQ+0x111/0x1c0 arch/x86/kernel/irq.c:258
 common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:582
 </IRQ>
RIP: 0010:trace_sched_process_wait include/trace/events/sched.h:253 [inline]
RIP: 0010:do_wait+0xc9/0xb80 kernel/exit.c:1495
Code: 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 bd 18 35 00 0f 1f 44 00 00 e8 b3 18 35 00 bf 3f 00 00 00 65 8b 1d 87 2f b8 7e <89> de e8 b0 19 35 00 83 fb 3f 0f 87 c3 08 00 00 e8 92 18 35 00 89
kobject: 'loop3' (00000000d3e0ef9f): kobject_uevent_env
RSP: 0018:ffff880184cf7a30 EFLAGS: 00000293 ORIG_RAX: ffffffffffffffdb
RAX: ffff8801bfc2e200 RBX: 0000000000000001 RCX: 1ffff1003099ef4c
RDX: 0000000000000000 RSI: ffffffff8149519d RDI: 000000000000003f
RBP: ffff880184cf7be8 R08: ffff8801bfc2e200 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff1003099ef81
R13: ffff880184cf7c28 R14: 0000000000000000 R15: ffff880184cf7c28
kobject: 'loop3' (00000000d3e0ef9f): fill_kobj_path: path = '/devices/virtual/block/loop3'
 kernel_wait4+0x247/0x3f0 kernel/exit.c:1659
 __do_sys_wait4+0x137/0x150 kernel/exit.c:1671
kobject: 'loop5' (00000000bcd170bd): kobject_uevent_env
kobject: 'loop5' (00000000bcd170bd): fill_kobj_path: path = '/devices/virtual/block/loop5'
 __se_sys_wait4 kernel/exit.c:1667 [inline]
 __x64_sys_wait4+0x97/0xf0 kernel/exit.c:1667
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x41124a
Code: 0f 83 1a 17 00 00 c3 66 0f 1f 84 00 00 00 00 00 8b 05 6e 4d 63 00 85 c0 75 36 45 31 d2 48 63 d2 48 63 ff b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 d4 ff ff ff f7
RSP: 002b:00007ffcb37d1658 EFLAGS: 00000246 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 000000000008e936 RCX: 000000000041124a
RDX: 0000000040000001 RSI: 00007ffcb37d1690 RDI: ffffffffffffffff
RBP: 00000000000007d9 R08: 0000000000000001 R09: 0000000001e8e940
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000a
R13: 000000000008e875 R14: 000000000000020d R15: 0000000000000001
Kernel Offset: disabled
Rebooting in 86400 seconds..