audit: type=1400 audit(2000000284.630:68): avc:  denied  { create } for  pid=29767 comm="syz-executor1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=0
------------[ cut here ]------------
WARNING: CPU: 0 PID: 29785 at fs/ext4/page-io.c:205 ext4_add_complete_io fs/ext4/page-io.c:205 [inline]
WARNING: CPU: 0 PID: 29785 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: 29785 Comm: syz-executor2 Not tainted 4.9.125+ #37
 ffff8801db607a60 ffffffff81af0ae9 ffffffff82838ba0 00000000ffffffff
 0000000000000000 0000000000000000 00000000000000cd ffff8801db607b20
 ffffffff813df095 0000000041b58ab3 ffffffff82c28773 ffffffff813deed6
Call Trace:
 <IRQ> [  401.614991]  [<ffffffff81af0ae9>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ> [  401.614991]  [<ffffffff81af0ae9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff813df095>] panic+0x1bf/0x39f kernel/panic.c:179
 [<ffffffff813df364>] __warn.cold.9+0xc1/0x17f kernel/panic.c:542
 [<ffffffff810d93cc>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585
 [<ffffffff816bea3f>] ext4_add_complete_io fs/ext4/page-io.c:205 [inline]
 [<ffffffff816bea3f>] ext4_put_io_end_defer+0x21f/0x2d0 fs/ext4/page-io.c:268
 [<ffffffff816bec26>] ext4_end_bio+0x136/0x460 fs/ext4/page-io.c:324
 [<ffffffff81a67515>] bio_endio+0x1a5/0x1f0 block/bio.c:1781
 [<ffffffff81a875e8>] req_bio_endio block/blk-core.c:157 [inline]
 [<ffffffff81a875e8>] blk_update_request+0x248/0x9b0 block/blk-core.c:2628
 [<ffffffff81dbf4bd>] scsi_end_request+0x9d/0x5c0 drivers/scsi/scsi_lib.c:606
 [<ffffffff81dc49b3>] scsi_io_completion+0x273/0x17a0 drivers/scsi/scsi_lib.c:829
 [<ffffffff81da8cfa>] scsi_finish_command+0x3ba/0x530 drivers/scsi/scsi.c:607
 [<ffffffff81dc3300>] scsi_softirq_done+0x250/0x360 drivers/scsi/scsi_lib.c:1567
 [<ffffffff81aa44f5>] blk_done_softirq+0x205/0x2e0 block/blk-softirq.c:35
 [<ffffffff82791480>] __do_softirq+0x210/0x940 kernel/softirq.c:288
 [<ffffffff810ecb14>] invoke_softirq kernel/softirq.c:368 [inline]
 [<ffffffff810ecb14>] irq_exit+0x114/0x150 kernel/softirq.c:409
 [<ffffffff8278e49d>] exiting_irq arch/x86/include/asm/apic.h:669 [inline]
 [<ffffffff8278e49d>] do_IRQ+0x10d/0x1c0 arch/x86/kernel/irq.c:252
 [<ffffffff8278ca9d>] common_interrupt+0x9d/0x9d arch/x86/entry/entry_64.S:461
 <EOI> [  401.790215]  [<ffffffff8278b8cf>] ? arch_local_irq_restore arch/x86/include/asm/paravirt.h:768 [inline]
 <EOI> [  401.790215]  [<ffffffff8278b8cf>] ? __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:162 [inline]
 <EOI> [  401.790215]  [<ffffffff8278b8cf>] ? _raw_spin_unlock_irqrestore+0x5f/0x70 kernel/locking/spinlock.c:191
 [<ffffffff81b57b8e>] __debug_check_no_obj_freed lib/debugobjects.c:733 [inline]
 [<ffffffff81b57b8e>] debug_check_no_obj_freed+0x2ce/0x890 lib/debugobjects.c:749
 [<ffffffff814cfaa4>] slab_free_hook mm/slub.c:1348 [inline]
 [<ffffffff814cfaa4>] slab_free_freelist_hook mm/slub.c:1377 [inline]
 [<ffffffff814cfaa4>] slab_free mm/slub.c:2958 [inline]
 [<ffffffff814cfaa4>] kmem_cache_free+0x1a4/0x310 mm/slub.c:2980
 [<ffffffff8223bbc8>] kfree_skbmem+0x98/0x100 net/core/skbuff.c:623
 [<ffffffff8223dc6e>] __kfree_skb net/core/skbuff.c:685 [inline]
 [<ffffffff8223dc6e>] consume_skb+0xce/0x340 net/core/skbuff.c:757
 [<ffffffff82349c4e>] netlink_broadcast_filtered+0x2ae/0x9f0 net/netlink/af_netlink.c:1486
 [<ffffffff81af9d68>] kobject_uevent_env+0x6d8/0xb80 lib/kobject_uevent.c:316
 [<ffffffff81afa22f>] kobject_uevent+0x1f/0x30 lib/kobject_uevent.c:374
 [<ffffffff822f45f1>] rx_queue_add_kobject net/core/net-sysfs.c:923 [inline]
 [<ffffffff822f45f1>] net_rx_queue_update_kobjects+0x2d1/0x3d0 net/core/net-sysfs.c:945
 [<ffffffff822f4ca1>] register_queue_kobjects net/core/net-sysfs.c:1368 [inline]
 [<ffffffff822f4ca1>] netdev_register_kobject+0x211/0x2f0 net/core/net-sysfs.c:1572
 [<ffffffff8229b239>] register_netdevice+0x989/0xe70 net/core/dev.c:7292
 [<ffffffff8255fe6b>] __ip_tunnel_create+0x34b/0x430 net/ipv4/ip_tunnel.c:282
 [<ffffffff825625f6>] ip_tunnel_init_net+0x226/0x4d0 net/ipv4/ip_tunnel.c:1014
 [<ffffffff8256e1f1>] vti_init_net+0x31/0x2f0 net/ipv4/ip_vti.c:447
 [<ffffffff82265ed0>] ops_init+0xb0/0x3a0 net/core/net_namespace.c:111
 [<ffffffff82267c89>] setup_net+0x1b9/0x3f0 net/core/net_namespace.c:291
 [<ffffffff82269419>] copy_net_ns+0x189/0x290 net/core/net_namespace.c:408
 [<ffffffff81140e31>] create_new_namespaces+0x501/0x760 kernel/nsproxy.c:106
 [<ffffffff81141625>] unshare_nsproxy_namespaces+0xa5/0x1d0 kernel/nsproxy.c:205
 [<ffffffff810d8199>] SYSC_unshare kernel/fork.c:2254 [inline]
 [<ffffffff810d8199>] SyS_unshare+0x319/0x710 kernel/fork.c:2204
 [<ffffffff8100554f>] do_syscall_64+0x19f/0x480 arch/x86/entry/common.c:282
 [<ffffffff8278c193>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..