EXT4-fs (sda1): group quota file already specified
EXT4-fs (sda1): re-mounted. Opts: ,errors=continue
WARNING: CPU: 0 PID: 14369 at fs/ext4/page-io.c:206 ext4_add_complete_io fs/ext4/page-io.c:206 [inline]
WARNING: CPU: 0 PID: 14369 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: 14369 Comm: syz-executor2 Not tainted 4.18.0-rc7-next-20180803+ #31
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 28 9b 64 ff <0f> 0b e9 d0 fd ff ff e8 7c 98 a3 ff e9 85 fc ff ff 48 89 b5 20 ff
RSP: 0018:ffff8801db007100 EFLAGS: 00010006
RAX: ffff8801948b4440 RBX: ffff88017c2af0c0 RCX: ffffffff8217fe37
RDX: 0000000000010000 RSI: ffffffff82180158 RDI: ffff8801cce8a960
RBP: ffff8801db0071f0 R08: ffff8801948b4440 R09: ffffed002f855e1d
R10: ffffed002f855e1d R11: ffff88017c2af0ef R12: 1ffff1003b600e25
R13: ffff88017b47f5b0 R14: ffff8801db0071c8 R15: ffff8801cce8a680
 ext4_end_bio+0x243/0x6e0 fs/ext4/page-io.c:335
 bio_endio+0x5a6/0xb60 block/bio.c:1774
 req_bio_endio block/blk-core.c:277 [inline]
 blk_update_request+0x3ab/0xcd0 block/blk-core.c:3093
 scsi_end_request+0xde/0x890 drivers/scsi/scsi_lib.c:679
 scsi_io_completion+0x26b/0x1ba0 drivers/scsi/scsi_lib.c:1099
 scsi_finish_command+0x54a/0x8f0 drivers/scsi/scsi.c:248
 scsi_softirq_done+0x3f6/0x4d0 drivers/scsi/scsi_lib.c:1748
 __blk_mq_complete_request block/blk-mq.c:581 [inline]
 blk_mq_complete_request+0x359/0x640 block/blk-mq.c:618
 scsi_mq_done+0xe7/0x450 drivers/scsi/scsi_lib.c:2059
 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+0x1c8/0xaf0 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+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:77
 do_IRQ+0x78/0x190 arch/x86/kernel/irq.c:245
 common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:645
 </IRQ>
RIP: 0010:__sanitizer_cov_trace_pc+0x1e/0x50 kernel/kcov.c:97
Code: 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 3f 51 85 7e 48 89 e5 81 e2 00 01 1f 00 48 8b 75 08 <75> 2b 8b 90 88 12 00 00 83 fa 02 75 20 48 8b 88 90 12 00 00 8b 80
RSP: 0018:ffff8801a913ebf0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffda
RAX: ffff8801948b4440 RBX: 80000001aac20007 RCX: ffffffff81acbc2e
RDX: 0000000000000000 RSI: ffffffff81acbc3c RDI: 0000000000000005
RBP: ffff8801a913ebf0 R08: ffff8801948b4440 R09: fffff94000d5623e
R10: fffff94000d5623e R11: ffffea0006ab11f3 R12: 0000000000000001
R13: 00007f2fdc800000 R14: dffffc0000000000 R15: ffff8801998daf28
 zap_pte_range mm/memory.c:1318 [inline]
 zap_pmd_range mm/memory.c:1447 [inline]
 zap_pud_range mm/memory.c:1476 [inline]
 zap_p4d_range mm/memory.c:1497 [inline]
 unmap_page_range+0x9fc/0x2100 mm/memory.c:1518
 unmap_single_vma+0x1a0/0x310 mm/memory.c:1563
 unmap_vmas+0x125/0x200 mm/memory.c:1593
 exit_mmap+0x2c2/0x590 mm/mmap.c:3093
 __mmput kernel/fork.c:1003 [inline]
 mmput+0x265/0x620 kernel/fork.c:1024
 exit_mm kernel/exit.c:544 [inline]
 do_exit+0xec6/0x2760 kernel/exit.c:856
 do_group_exit+0x177/0x440 kernel/exit.c:972
 get_signal+0x88e/0x1970 kernel/signal.c:2467
 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816
 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x456b29
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:00007f2fdaf51c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: fffffffffffffe00 RBX: 00007f2fdaf526d4 RCX: 0000000000456b29
RDX: 0000000000000039 RSI: 0000000020000040 RDI: 0000000000000014
RBP: 00000000009301e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d2b28 R14: 00000000004c7124 R15: 0000000000000002
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..