syzkaller login: [   16.305150] INFO: trying to register non-static key.
[   16.305671] the code is fine but needs lockdep annotation.
[   16.306408] turning off the locking correctness validator.
[   16.306956] CPU: 0 PID: 2990 Comm: syzkaller460037 Not tainted 4.14.0-rc7-next-20171103+ #10
[   16.307782] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
[   16.308571] Call Trace:
[   16.308831]  dump_stack+0x194/0x257
[   16.309192]  ? arch_local_irq_restore+0x53/0x53
executing program
[   16.309657]  register_lock_class+0x55e/0x2c70
[   16.310347]  ? __lock_acquire+0x739/0x4770
[   16.310761]  ? __lock_acquire+0x739/0x4770
[   16.311174]  ? lock_pin_lock+0x370/0x370
[   16.311569]  ? __lock_acquire+0x739/0x4770
[   16.311981]  ? debug_check_no_locks_freed+0x3d0/0x3d0
[   16.312493]  ? debug_check_no_locks_freed+0x3d0/0x3d0
[   16.313006]  ? check_noncircular+0x20/0x20
[   16.313419]  ? __lock_acquire+0x739/0x4770
[   16.313924]  ? check_noncircular+0x20/0x20
[   16.314346]  ? find_held_lock+0x39/0x1d0
[   16.314745]  ? check_noncircular+0x20/0x20
[   16.315159]  ? lock_downgrade+0x990/0x990
[   16.315564]  ? find_held_lock+0x39/0x1d0
[   16.315964]  __lock_acquire+0x203/0x4770
[   16.316366]  ? find_held_lock+0x39/0x1d0
[   16.316769]  ? debug_check_no_locks_freed+0x3d0/0x3d0
[   16.317277]  ? depot_save_stack+0x1c2/0x490
[   16.317702]  ? do_raw_spin_trylock+0x190/0x190
[   16.318231]  ? is_bpf_text_address+0xa4/0x120
[   16.318670]  ? kernel_text_address+0x102/0x140
[   16.319116]  ? _raw_spin_unlock_irqrestore+0x31/0xba
[   16.319611]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   16.320105]  ? trace_hardirqs_on+0xd/0x10
[   16.320519]  ? depot_save_stack+0x3b5/0x490
[   16.320946]  ? save_stack+0xa3/0xd0
[   16.321301]  ? save_stack+0x43/0xd0
[   16.321656]  ? kasan_kmalloc+0xad/0xe0
[   16.322077]  ? __kmalloc+0x162/0x760
[   16.322443]  ? __crypto_alloc_tfm+0xd0/0x4e0
[   16.322873]  ? crypto_alloc_base+0x55/0x1d0
[   16.323300]  ? tcp_fastopen_reset_cipher+0xe5/0x580
[   16.323790]  ? do_tcp_setsockopt.isra.37+0x24d/0x21b0
[   16.324296]  ? tcp_setsockopt+0xb0/0xd0
[   16.324684]  ? sock_common_setsockopt+0x95/0xd0
[   16.325153]  ? SyS_setsockopt+0x189/0x360
[   16.325868]  ? entry_SYSCALL_64_fastpath+0x1f/0xbe
[   16.326348]  ? lock_downgrade+0x990/0x990
[   16.326754]  ? rcu_note_context_switch+0x710/0x710
[   16.327239]  ? sock_common_setsockopt+0x95/0xd0
[   16.327703]  ? trace_event_raw_event_sched_switch+0x8a0/0x8a0
[   16.328281]  ? rcu_pm_notify+0xc0/0xc0
[   16.328665]  lock_acquire+0x1d5/0x580
[   16.329037]  ? tcp_fastopen_reset_cipher+0x194/0x580
[   16.329535]  ? __kmalloc+0x471/0x760
[   16.329961]  ? lock_release+0xd70/0xd70
[   16.330382]  ? crypto_aes_set_key+0x32/0x80
[   16.330805]  ? tcp_fastopen_reset_cipher+0x194/0x580
[   16.331306]  _raw_spin_lock_bh+0x31/0x40
[   16.331707]  ? tcp_fastopen_reset_cipher+0x194/0x580
[   16.332206]  tcp_fastopen_reset_cipher+0x194/0x580
[   16.332690]  ? tcp_fastopen_ctx_destroy+0x220/0x220
[   16.333184]  ? __might_sleep+0x95/0x190
[   16.333578]  ? kasan_check_write+0x14/0x20
[   16.334044]  ? _copy_from_user+0x99/0x110
[   16.334452]  do_tcp_setsockopt.isra.37+0x24d/0x21b0
[   16.334940]  ? tcp_get_md5sig_pool+0x60/0x60
[   16.335368]  ? handle_mm_fault+0x410/0x8d0
[   16.335781]  ? down_read_trylock+0xdb/0x170
[   16.336201]  ? __do_page_fault+0x32d/0xc90
[   16.336615]  ? __handle_mm_fault+0x39c0/0x39c0
[   16.337060]  ? vmacache_find+0x5f/0x280
[   16.337450]  ? vmacache_update+0xfe/0x130
[   16.337902]  ? sock_has_perm+0x29c/0x400
[   16.338310]  ? __fget_light+0x29d/0x390
[   16.338701]  ? selinux_secmark_relabel_packet+0xc0/0xc0
[   16.339225]  ? selinux_netlbl_sock_rcv_skb+0x730/0x730
[   16.339744]  tcp_setsockopt+0xb0/0xd0
[   16.340124]  sock_common_setsockopt+0x95/0xd0
[   16.340566]  SyS_setsockopt+0x189/0x360
[   16.340957]  ? SyS_recv+0x40/0x40
[   16.341296]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   16.341808]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   16.342317]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   16.342778]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   16.343239] RIP: 0033:0x434e69
[   16.343553] RSP: 002b:00007ffebc51ad98 EFLAGS: 00000203 ORIG_RAX: 0000000000000036
[   16.344298] RAX: ffffffffffffffda RBX: 00000000004002b0 RCX: 0000000000434e69
[   16.345003] RDX: 0000000000000021 RSI: 0000000000000006 RDI: 0000000000000003
[   16.345704] RBP: 0000000000000086 R08: 0000000000000010 R09: 0000000000000000
[   16.346826] R10: 0000000020f2b000 R11: 0000000000000203 R12: 0000000000000000
[   16.347531] R13: 00000000004017e0 R14: 0000000000401870 R15: 0000000000000000