executing program
syzkaller login: [   25.726523] BUG: unable to handle kernel NULL pointer dereference at 0000000000000286
[   25.727590] IP: 0x286
[   25.727823] PGD 0 
[   25.727825] P4D 0 
[   25.728028] 
[   25.728340] Oops: 0010 [#1] SMP KASAN
[   25.728652] Dumping ftrace buffer:
[   25.728964]    (ftrace buffer empty)
[   25.729285] Modules linked in:
[   25.729554] CPU: 3 PID: 1197 Comm: kworker/u8:1 Not tainted 4.13.0-rc6-next-20170823+ #7
[   25.730538] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
[   25.731715] Workqueue: kstrp strp_work
[   25.732283] task: ffff88006acde640 task.stack: ffff88006ace0000
[   25.733106] RIP: 0010:0x286
[   25.733487] RSP: 0018:ffff88006ace7520 EFLAGS: 00010246
[   25.734221] RAX: dffffc0000000000 RBX: ffff88006a3edb78 RCX: 0000000000000000
[   25.735248] RDX: 1ffff1000d47db81 RSI: ffffffff85b37920 RDI: ffff88006a3eda48
[   25.736240] RBP: ffff88006ace7538 R08: ffff88006ace6e98 R09: ffff88006ace6ea8
[   25.737244] R10: ffff88006ace6e20 R11: 1ffff1000d59bf5b R12: ffff88006a3eda48
[   25.738225] R13: ffff88006b0eaa18 R14: ffff88006ace7980 R15: ffff88006b0eaa00
[   25.739248] FS:  0000000000000000(0000) GS:ffff88006df00000(0000) knlGS:0000000000000000
[   25.740366] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   25.741177] CR2: 0000000000000286 CR3: 00000000690d0000 CR4: 00000000000006e0
[   25.745411] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   25.746489] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   25.747616] Call Trace:
[   25.747975]  ? strp_work+0x41/0xf0
[   25.748516]  process_one_work+0xbfd/0x1be0
[   25.749116]  ? check_noncircular+0x20/0x20
[   25.749701]  ? pwq_dec_nr_in_flight+0x450/0x450
[   25.750360]  ? finish_task_switch+0x1d3/0x740
[   25.751181]  ? finish_task_switch+0x1aa/0x740
[   25.751825]  ? __sched_text_start+0x8/0x8
[   25.752469]  ? check_noncircular+0x20/0x20
[   25.753074]  ? select_task_rq_fair+0x3da/0x3380
[   25.753957]  ? find_held_lock+0x39/0x1d0
[   25.754582]  ? lock_acquire+0x1d5/0x580
[   25.755224]  ? worker_thread+0x4a3/0x1860
[   25.755781]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   25.756517]  ? lock_release+0xd70/0xd70
[   25.757524]  ? do_raw_spin_trylock+0x190/0x190
[   25.758153]  ? retint_kernel+0x10/0x10
[   25.758711]  worker_thread+0x223/0x1860
[   25.759599]  ? process_one_work+0x1be0/0x1be0
[   25.760212]  ? check_noncircular+0x20/0x20
[   25.760793]  ? _raw_spin_unlock_irq+0x27/0x70
[   25.761436]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   25.762103]  ? trace_hardirqs_on+0xd/0x10
[   25.762670]  ? _raw_spin_unlock_irq+0x27/0x70
[   25.763328]  ? finish_task_switch+0x1d3/0x740
[   25.765624]  ? finish_task_switch+0x1aa/0x740
[   25.766025]  ? preempt_notifier_dec+0x20/0x20
[   25.766430]  ? __schedule+0x8f0/0x2070
[   25.766756]  ? __x2apic_send_IPI_dest.constprop.7+0x5b/0x80
[   25.767295]  ? try_to_wake_up+0xf9/0x1600
[   25.767663]  ? find_held_lock+0x39/0x1d0
[   25.768024]  ? lock_downgrade+0x990/0x990
[   25.768396]  ? complete+0x18/0x80
[   25.768688]  ? __schedule+0x2070/0x2070
[   25.769037]  ? _raw_spin_unlock_irqrestore+0x31/0xba
[   25.769481]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   25.769901]  ? trace_hardirqs_on+0xd/0x10
[   25.770258]  ? __kthread_parkme+0x173/0x240
[   25.770645]  kthread+0x39c/0x470
[   25.770927]  ? process_one_work+0x1be0/0x1be0
[   25.771353]  ? kthread_create_on_node+0x100/0x100
[   25.771782]  ret_from_fork+0x2a/0x40
[   25.772121] Code:  Bad RIP value.
[   25.772432] RIP: 0x286 RSP: ffff88006ace7520
[   25.772799] CR2: 0000000000000286
[   25.773143] ---[ end trace 6042f59fbac60ba5 ]---
[   25.773547] Kernel panic - not syncing: Fatal exception
[   25.774093] Dumping ftrace buffer:
[   25.774420]    (ftrace buffer empty)
[   25.774732] Kernel Offset: disabled
[   25.775044] Rebooting in 86400 seconds..