BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 8378 Comm: syz-executor.1 Not tainted 4.14.231-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 add_chain_cache kernel/locking/lockdep.c:2303 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:2415 [inline]
 validate_chain kernel/locking/lockdep.c:2435 [inline]
 __lock_acquire.cold+0x19a/0x97c kernel/locking/lockdep.c:3491
 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
 seqcount_lockdep_reader_access include/linux/seqlock.h:81 [inline]
 read_seqcount_begin include/linux/seqlock.h:164 [inline]
 ktime_get+0xbd/0x2c0 kernel/time/timekeeping.c:760
 hrtimer_expires_remaining include/linux/hrtimer.h:261 [inline]
 __hrtimer_get_remaining+0xd7/0x1d0 kernel/time/hrtimer.c:1060
 hrtimer_get_remaining include/linux/hrtimer.h:404 [inline]
 perf_swevent_cancel_hrtimer kernel/events/core.c:8788 [inline]
 perf_swevent_cancel_hrtimer kernel/events/core.c:8783 [inline]
 cpu_clock_event_stop kernel/events/core.c:8842 [inline]
 cpu_clock_event_del+0x78/0xc0 kernel/events/core.c:8857
 event_sched_out+0x8b3/0x11b0 kernel/events/core.c:1867
 group_sched_out+0x13e/0x3c0 kernel/events/core.c:1897
 ctx_sched_out+0x4f4/0x9d0 kernel/events/core.c:2852
 task_ctx_sched_out+0x5b/0x80 kernel/events/core.c:2320
 perf_event_context_sched_out kernel/events/core.c:3035 [inline]
 __perf_event_task_sched_out+0x853/0x11d0 kernel/events/core.c:3126
 perf_event_task_sched_out include/linux/perf_event.h:1104 [inline]
 prepare_task_switch kernel/sched/core.c:2601 [inline]
 context_switch kernel/sched/core.c:2773 [inline]
 __schedule+0xc74/0x1de0 kernel/sched/core.c:3384
 preempt_schedule_irq+0xb0/0x140 kernel/sched/core.c:3611
 retint_kernel+0x1b/0x2d
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
RIP: 0010:queue_work_on+0x140/0x1d0 kernel/workqueue.c:1494
RSP: 0018:ffff88822542f960 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff10
RAX: 0000000000040000 RBX: 0000000000000212 RCX: ffffc90005aff000
RDX: 000000000000d443 RSI: ffffffff8135ee7b RDI: 0000000000000212
RBP: 0000000000000008 R08: ffff8880ba42ac30 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888095134300
R13: ffff88813fe20080 R14: 0000000000000001 R15: ffff8880afecabe8
 queue_work include/linux/workqueue.h:491 [inline]
 call_usermodehelper_exec+0x1ad/0x410 kernel/umh.c:453
 kobject_uevent_env+0xc47/0xf40 lib/kobject_uevent.c:529
 device_add+0xa47/0x15c0 drivers/base/core.c:1931
 rfkill_register+0x18e/0xab0 net/rfkill/core.c:1022
 hci_register_dev+0x359/0x8f0 net/bluetooth/hci_core.c:3130
 hci_uart_register_dev drivers/bluetooth/hci_ldisc.c:686 [inline]
 hci_uart_set_proto drivers/bluetooth/hci_ldisc.c:710 [inline]
 hci_uart_tty_ioctl+0x6d1/0xa60 drivers/bluetooth/hci_ldisc.c:764
 tty_ioctl+0x5af/0x13c0 drivers/tty/tty_io.c:2670
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x4665f9
RSP: 002b:00007f1019a57188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 00000000400455c8 RDI: 0000000000000004
RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffe892c7a7f R14: 00007f1019a57300 R15: 0000000000022000
Bluetooth: hci6 sending frame failed (-49)
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
Bluetooth: hci6 command 0x1003 tx timeout
Bluetooth: hci6 sending frame failed (-49)
Bluetooth: hci6 command 0x1001 tx timeout
Bluetooth: hci6 sending frame failed (-49)
Bluetooth: hci6 command 0x1009 tx timeout
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
Bluetooth: hci6: Frame reassembly failed (-84)
Bluetooth: hci6: Frame reassembly failed (-84)
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
Bluetooth: hci7: Frame reassembly failed (-84)
Bluetooth: hci8 sending frame failed (-49)
Bluetooth: hci6 command 0x1003 tx timeout
Bluetooth: hci6 sending frame failed (-49)
Bluetooth: hci7 command 0x1003 tx timeout
Bluetooth: hci7 sending frame failed (-49)
Bluetooth: hci8 command 0x1003 tx timeout
Bluetooth: hci8 sending frame failed (-49)