BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 1164 Comm: khugepaged Not tainted 5.8.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 add_chain_cache kernel/locking/lockdep.c:3063 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3162 [inline]
 validate_chain kernel/locking/lockdep.c:3183 [inline]
 __lock_acquire.cold+0x11/0x3f8 kernel/locking/lockdep.c:4380
 lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:4959
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
 rq_lock kernel/sched/sched.h:1261 [inline]
 ttwu_queue kernel/sched/core.c:2410 [inline]
 try_to_wake_up+0x5c4/0x1360 kernel/sched/core.c:2663
 swake_up_locked kernel/sched/swait.c:30 [inline]
 swake_up_locked kernel/sched/swait.c:22 [inline]
 swake_up_one+0x71/0x1b0 kernel/sched/swait.c:53
 rcu_report_unblock_qs_rnp kernel/rcu/tree.c:2174 [inline]
 rcu_preempt_deferred_qs_irqrestore+0x832/0xb00 kernel/rcu/tree_plugin.h:519
 rcu_read_unlock_special kernel/rcu/tree_plugin.h:633 [inline]
 __rcu_read_unlock+0x16e/0x560 kernel/rcu/tree_plugin.h:395
 rcu_read_unlock include/linux/rcupdate.h:687 [inline]
 start_flush_work kernel/workqueue.c:3026 [inline]
 __flush_work+0x940/0xab0 kernel/workqueue.c:3045
 lru_add_drain_all+0x3ca/0x590 mm/swap.c:807
 khugepaged_do_scan mm/khugepaged.c:2177 [inline]
 khugepaged+0x10b/0x5a10 mm/khugepaged.c:2238
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293