hid-generic 0000:0000:0000.013D: unknown main item tag 0x0
hid-generic 0000:0000:0000.013D: hidraw0: <UNKNOWN> HID v0.00 Device [syz1] on syz1
IPVS: Creating netns size=2536 id=23
IPVS: Creating netns size=2536 id=24
------------[ 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+0x21f/0x2d0 fs/ext4/page-io.c:268
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.124-g09eb2ba #31
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801db2077c8 ffffffff81eb95e9 ffffffff83c48ac0 00000000ffffffff
 0000000000000000 0000000000000000 00000000000000cd ffff8801db207888
 ffffffff81423eb5 0000000041b58ab3 ffffffff843bb8e8 ffffffff81423cf6
Call Trace:
 <IRQ> [  282.875103]  [<ffffffff81eb95e9>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ> [  282.875103]  [<ffffffff81eb95e9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81423eb5>] panic+0x1bf/0x3bc kernel/panic.c:179
 [<ffffffff814241a1>] __warn.cold.9+0xc1/0x17f kernel/panic.c:542
 [<ffffffff811383bc>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585
 [<ffffffff817679ff>] ext4_add_complete_io fs/ext4/page-io.c:205 [inline]
 [<ffffffff817679ff>] ext4_put_io_end_defer+0x21f/0x2d0 fs/ext4/page-io.c:268
 [<ffffffff81767be6>] ext4_end_bio+0x136/0x460 fs/ext4/page-io.c:324
 [<ffffffff81e062e2>] bio_endio+0x1a2/0x200 block/bio.c:1781
 [<ffffffff81e27198>] req_bio_endio block/blk-core.c:157 [inline]
 [<ffffffff81e27198>] blk_update_request+0x248/0x9c0 block/blk-core.c:2628
 [<ffffffff826e40dd>] scsi_end_request+0x9d/0x5c0 drivers/scsi/scsi_lib.c:606
 [<ffffffff826ec9fc>] scsi_io_completion+0x27c/0x17f0 drivers/scsi/scsi_lib.c:829
 [<ffffffff826d075a>] scsi_finish_command+0x3ba/0x530 drivers/scsi/scsi.c:607
 [<ffffffff826eb430>] scsi_softirq_done+0x250/0x360 drivers/scsi/scsi_lib.c:1567
 [<ffffffff81e4c0e3>] blk_mq_ipi_complete_request block/blk-mq.c:376 [inline]
 [<ffffffff81e4c0e3>] __blk_mq_complete_request+0x203/0x4a0 block/blk-mq.c:388
 [<ffffffff81e4c3e5>] blk_mq_complete_request+0x65/0x80 block/blk-mq.c:407
 [<ffffffff826e763e>] scsi_mq_done+0xce/0x320 drivers/scsi/scsi_lib.c:1877
 [<ffffffff82711e75>] virtscsi_complete_cmd+0x5d5/0x810 drivers/scsi/virtio_scsi.c:212
 [<ffffffff8270f47b>] virtscsi_vq_done+0xcb/0x170 drivers/scsi/virtio_scsi.c:230
 [<ffffffff8270f5c7>] virtscsi_req_done+0xa7/0xd0 drivers/scsi/virtio_scsi.c:245
 [<ffffffff820fe38b>] vring_interrupt+0x10b/0x150 drivers/virtio/virtio_ring.c:907
 [<ffffffff81265721>] __handle_irq_event_percpu+0xf1/0x7d0 kernel/irq/handle.c:145
 [<ffffffff81265e74>] handle_irq_event_percpu+0x74/0x150 kernel/irq/handle.c:185
 [<ffffffff81265ff7>] handle_irq_event+0xa7/0x140 kernel/irq/handle.c:202
 [<ffffffff812702cf>] handle_edge_irq+0x1ff/0x900 kernel/irq/chip.c:665
 [<ffffffff81059b84>] generic_handle_irq_desc include/linux/irqdesc.h:150 [inline]
 [<ffffffff81059b84>] handle_irq+0x254/0x3a0 arch/x86/kernel/irq_64.c:77
 [<ffffffff83a04239>] do_IRQ+0x89/0x1c0 arch/x86/kernel/irq.c:240
 [<ffffffff83a022e0>] common_interrupt+0xa0/0xa0 arch/x86/entry/entry_64.S:461
 <EOI> [  283.152619]  [<ffffffff83a00606>] ? native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:55
 [<ffffffff839ffc45>] arch_safe_halt arch/x86/include/asm/paravirt.h:104 [inline]
 [<ffffffff839ffc45>] default_idle+0x55/0x360 arch/x86/kernel/process.c:437
 [<ffffffff8106ae20>] arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:428
 [<ffffffff83a00a65>] default_idle_call+0x45/0x60 kernel/sched/idle.c:97
 [<ffffffff81225495>] cpuidle_idle_call kernel/sched/idle.c:155 [inline]
 [<ffffffff81225495>] cpu_idle_loop kernel/sched/idle.c:248 [inline]
 [<ffffffff81225495>] cpu_startup_entry+0x2b5/0x380 kernel/sched/idle.c:303
 [<ffffffff839ed8cc>] rest_init+0x183/0x189 init/main.c:409
 [<ffffffff84c98943>] start_kernel+0x67e/0x6b2 init/main.c:664
 [<ffffffff84c9729a>] x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:196
 [<ffffffff84c973db>] x86_64_start_kernel+0x13f/0x162 arch/x86/kernel/head64.c:177
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..