WARNING: CPU: 0 PID: 28595 at fs/ext4/page-io.c:206 ext4_add_complete_io fs/ext4/page-io.c:206 [inline]
WARNING: CPU: 0 PID: 28595 at fs/ext4/page-io.c:206 ext4_put_io_end_defer+0x438/0x590 fs/ext4/page-io.c:269
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 28595 Comm: syz-executor2 Not tainted 4.19.0-rc2-next-20180904+ #55
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+0x1c9/0x2b4 lib/dump_stack.c:113
 panic+0x238/0x4e7 kernel/panic.c:184
 __warn.cold.8+0x163/0x1ba kernel/panic.c:536
 report_bug+0x252/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:996
RIP: 0010:ext4_add_complete_io fs/ext4/page-io.c:206 [inline]
RIP: 0010:ext4_put_io_end_defer+0x438/0x590 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 5e 01 00 00 49 83 bf e0 02 00 00 00 0f 84 dc fd ff ff e8 58 6e 64 ff <0f> 0b e9 d0 fd ff ff e8 0c 8a a3 ff e9 85 fc ff ff 48 89 b5 20 ff
RSP: 0018:ffff8801db0070f0 EFLAGS: 00010006
RAX: ffff880193e9c240 RBX: ffff88017e4c4e40 RCX: ffffffff821864f7
RDX: 0000000000010000 RSI: ffffffff82186818 RDI: ffff8801cb4f09e0
RBP: ffff8801db0071e0 R08: ffff880193e9c240 R09: ffffed002fc989cd
R10: ffffed002fc989cd R11: ffff88017e4c4e6f R12: 1ffff1003b600e23
R13: ffff8801b23a8830 R14: ffff8801db0071b8 R15: ffff8801cb4f0700
 ext4_end_bio+0x243/0x6e0 fs/ext4/page-io.c:335
 bio_endio+0x5a6/0xab0 block/bio.c:1774
 req_bio_endio block/blk-core.c:277 [inline]
 blk_update_request+0x3ab/0xc40 block/blk-core.c:3101
 scsi_end_request+0xde/0x890 drivers/scsi/scsi_lib.c:673
 scsi_io_completion+0x26b/0x1ba0 drivers/scsi/scsi_lib.c:1093
 scsi_finish_command+0x54a/0x8f0 drivers/scsi/scsi.c:248
 scsi_softirq_done+0x3f6/0x4d0 drivers/scsi/scsi_lib.c:1737
 __blk_mq_complete_request block/blk-mq.c:583 [inline]
 blk_mq_complete_request+0x359/0x640 block/blk-mq.c:620
 scsi_mq_done+0xef/0x3e0 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+0x1c8/0xa50 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+0x20f/0x870 kernel/irq/chip.c:791
 generic_handle_irq_desc include/linux/irqdesc.h:154 [inline]
 handle_irq+0x18c/0x2e7 arch/x86/kernel/irq_64.c:78
 do_IRQ+0x80/0x1a0 arch/x86/kernel/irq.c:246
 common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:645
 </IRQ>
RIP: 0010:__sanitizer_cov_trace_pc+0x1/0x50 kernel/kcov.c:94
Code: dd 28 00 00 00 4d 39 d0 72 1b 49 83 c1 01 4a 89 7c 10 e0 4a 89 74 10 e8 4a 89 54 10 f0 4a 89 4c d8 20 4c 89 08 5d c3 66 90 55 <65> 48 8b 04 25 40 ee 01 00 65 8b 15 4f 17 85 7e 48 89 e5 81 e2 00
RSP: 0018:ffff880187b66938 EFLAGS: 00000206 ORIG_RAX: ffffffffffffffda
RAX: 0000000000000007 RBX: 000000005ca563fc RCX: ffffc9000348f000
RDX: 0000000000000000 RSI: ffffffff856745db RDI: ffff880187b66bb4
RBP: ffff880187b669e8 R08: ffff880193e9c240 R09: ffff880187b66b98
R10: ffffed0030f6cd77 R11: ffff880187b66bbf R12: 000000006dd80324
R13: 0000000055f9da03 R14: ffff880187b66b98 R15: ffff880187b66bb0
 resolve_normal_ct net/netfilter/nf_conntrack_core.c:1462 [inline]
 nf_conntrack_in+0x585/0x1150 net/netfilter/nf_conntrack_core.c:1543
 ipv4_conntrack_local+0x1bc/0x290 net/netfilter/nf_conntrack_proto.c:480
 nf_hook_entry_hookfn include/linux/netfilter.h:119 [inline]
 nf_hook_slow+0xc2/0x1c0 net/netfilter/core.c:511
 nf_hook include/linux/netfilter.h:242 [inline]
 __ip_local_out+0x56d/0xb50 net/ipv4/ip_output.c:113
 ip_local_out+0x2d/0x1b0 net/ipv4/ip_output.c:122
 __ip_queue_xmit+0x9b6/0x1f20 net/ipv4/ip_output.c:505
 ip_queue_xmit+0x56/0x70 include/net/ip.h:197
 __tcp_transmit_skb+0x1cd2/0x4000 net/ipv4/tcp_output.c:1159
 tcp_transmit_skb net/ipv4/tcp_output.c:1175 [inline]
 tcp_write_xmit+0x1678/0x5c00 net/ipv4/tcp_output.c:2361
 __tcp_push_pending_frames+0xb2/0x290 net/ipv4/tcp_output.c:2534
 tcp_push+0x626/0x8b0 net/ipv4/tcp.c:735
 tcp_sendmsg_locked+0x18cc/0x3f20 net/ipv4/tcp.c:1393
 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1443
 inet_sendmsg+0x1a1/0x690 net/ipv4/af_inet.c:798
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:632
 __sys_sendto+0x3d7/0x670 net/socket.c:1787
 __do_sys_sendto net/socket.c:1799 [inline]
 __se_sys_sendto net/socket.c:1795 [inline]
 __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1795
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457099
Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fc85b8ecc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fc85b8ed6d4 RCX: 0000000000457099
RDX: 0000000000015554 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 00000000009300a0 R08: 0000000020000080 R09: 0000000000000010
R10: 0000000020006701 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d4cb0 R14: 00000000004c91a3 R15: 0000000000000000
Shutting down cpus with NMI
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..