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kernel BUG at kernel/sched/deadline.c:1068!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 24140 Comm: syz-executor.5 Not tainted 4.9.164+ #24
task: ffff8801c4d48000 task.stack: ffff8801957b8000
RIP: 0010:[<ffffffff811e92f2>]  [<ffffffff811e92f2>] enqueue_task_dl+0x772/0x2050 kernel/sched/deadline.c:1068
RSP: 0018:ffff8801957bf4e0  EFLAGS: 00010087
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8801c4d488b0
RDX: 1ffff1003b2ef65d RSI: ffff8801d977af80 RDI: ffff8801d977b2e8
RBP: ffff8801957bf550 R08: ffff8801d977b1f0 R09: ffffffff83577160
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8801d977af80
R13: 0000000000000078 R14: ffff8801db721000 R15: ffff8801d977b290
FS:  00007f4a20787700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200000c0 CR3: 000000018ea48000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
 ffff8801db721018 ffff8801c4d48000 0000000000000000 ffff8801d977af90
 0000000000000046 ffff8801db721018 ffff8801c4d48000 0000000000000000
 ffff8801d977af90 ffffffff82a4bb40 ffff8801d977af80 ffff8801db721000
Call Trace:
 [<ffffffff8117020a>] enqueue_task kernel/sched/core.c:774 [inline]
 [<ffffffff8117020a>] activate_task+0x15a/0x290 kernel/sched/core.c:790
 [<ffffffff811eaede>] push_dl_task.part.0+0x30e/0x470 kernel/sched/deadline.c:1638
 [<ffffffff811eb9c6>] push_dl_task kernel/sched/deadline.c:1578 [inline]
 [<ffffffff811eb9c6>] push_dl_tasks+0x46/0x60 kernel/sched/deadline.c:1654
 [<ffffffff811517aa>] __balance_callback+0x9a/0xe0 kernel/sched/core.c:2865
 [<ffffffff827f85ac>] balance_callback kernel/sched/core.c:2873 [inline]
 [<ffffffff827f85ac>] __schedule+0x101c/0x1b50 kernel/sched/core.c:3504
 [<ffffffff827f98df>] preempt_schedule_common+0x4f/0xe0 kernel/sched/core.c:3608
 [<ffffffff827f9996>] preempt_schedule+0x26/0x30 kernel/sched/core.c:3634
 [<ffffffff81002226>] ___preempt_schedule+0x16/0x18
 [<ffffffff8280744b>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:163 [inline]
 [<ffffffff8280744b>] _raw_spin_unlock_irqrestore+0x6b/0x70 kernel/locking/spinlock.c:191
 [<ffffffff81baf3f9>] __debug_check_no_obj_freed lib/debugobjects.c:733 [inline]
 [<ffffffff81baf3f9>] debug_check_no_obj_freed+0x2b9/0x6d0 lib/debugobjects.c:749
 [<ffffffff814f1b94>] slab_free_hook mm/slub.c:1348 [inline]
 [<ffffffff814f1b94>] slab_free_freelist_hook mm/slub.c:1377 [inline]
 [<ffffffff814f1b94>] slab_free mm/slub.c:2958 [inline]
 [<ffffffff814f1b94>] kmem_cache_free+0x1a4/0x310 mm/slub.c:2980
 [<ffffffff822bcbff>] kfree_skbmem+0x9f/0x100 net/core/skbuff.c:627
 [<ffffffff822bf7ce>] __kfree_skb net/core/skbuff.c:689 [inline]
 [<ffffffff822bf7ce>] consume_skb+0xce/0x340 net/core/skbuff.c:761
 [<ffffffff823ce53e>] netlink_broadcast_filtered+0x2ae/0x9d0 net/netlink/af_netlink.c:1486
 [<ffffffff81b51af5>] kobject_uevent_env+0x705/0xba0 lib/kobject_uevent.c:316
 [<ffffffff81b51fb0>] kobject_uevent+0x20/0x30 lib/kobject_uevent.c:374
 [<ffffffff82377a8e>] rx_queue_add_kobject net/core/net-sysfs.c:923 [inline]
 [<ffffffff82377a8e>] net_rx_queue_update_kobjects+0x2ce/0x3e0 net/core/net-sysfs.c:945
 [<ffffffff82378151>] register_queue_kobjects net/core/net-sysfs.c:1368 [inline]
 [<ffffffff82378151>] netdev_register_kobject+0x211/0x320 net/core/net-sysfs.c:1575
 [<ffffffff8231e25e>] register_netdevice+0x72e/0xd80 net/core/dev.c:7320
 [<ffffffff8231e8cb>] register_netdev+0x1b/0x30 net/core/dev.c:7432
 [<ffffffff8279118e>] sit_init_net+0x2de/0x890 net/ipv6/sit.c:1841
 [<ffffffff822e78e0>] ops_init+0xb0/0x3a0 net/core/net_namespace.c:111
 [<ffffffff822e9c54>] setup_net+0x1b4/0x4e0 net/core/net_namespace.c:291
 [<ffffffff822eb6f1>] copy_net_ns+0x191/0x340 net/core/net_namespace.c:408
 [<ffffffff811460dc>] create_new_namespaces+0x37c/0x7a0 kernel/nsproxy.c:106
 [<ffffffff81146aab>] unshare_nsproxy_namespaces+0xab/0x1e0 kernel/nsproxy.c:205
 [<ffffffff810d9bf5>] SYSC_unshare kernel/fork.c:2272 [inline]
 [<ffffffff810d9bf5>] SyS_unshare+0x305/0x6f0 kernel/fork.c:2222
 [<ffffffff810056bd>] do_syscall_64+0x1ad/0x570 arch/x86/entry/common.c:285
 [<ffffffff82807d13>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 38 d0 7c 08 84 d2 0f 85 f6 11 00 00 41 83 bc 24 cc 03 00 00 01 0f 8e b5 f9 ff ff 4c 89 e6 4c 89 f7 e8 93 f4 ff ff e9 a5 f9 ff ff <0f> 0b 4c 89 ee 4c 89 ff e8 91 b4 ff ff 48 c7 c2 00 10 02 00 4d 
RIP  [<ffffffff811e92f2>] enqueue_task_dl+0x772/0x2050 kernel/sched/deadline.c:1093
 RSP <ffff8801957bf4e0>
---[ end trace c26c837c0ffa027c ]---