rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=d6a/1/0x4000000000000000 softirq=54317/54321 fqs=749 
	(detected by 1, t=10502 jiffies, g=79865, q=30852)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 24510 Comm: syz-executor.2 Not tainted 5.9.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:3109 [inline]
RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:3128 [inline]
RIP: 0010:validate_chain+0x13d/0x88a0 kernel/locking/lockdep.c:3183
Code: 48 8d 58 f8 48 85 c0 48 0f 44 d8 48 85 db 74 48 4c 8d 63 18 4c 89 e0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 e7 e8 d3 14 5a 00 <49> 8b 04 24 4c 39 f0 74 1c 48 83 c3 08 48 89 d8 48 c1 e8 03 42 80
RSP: 0018:ffffc90000007920 EFLAGS: 00000046
RAX: 1ffffffff1606abf RBX: ffffffff8b0355e0 RCX: ffffffff815acc44
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8b6404c0
RBP: ffffc90000007b10 R08: dffffc0000000000 R09: fffffbfff16c8099
R10: fffffbfff16c8099 R11: 0000000000000000 R12: ffffffff8b0355f8
R13: ffff88805eb18b70 R14: 86ffc811e6eccc48 R15: dffffc0000000000
FS:  00007fdcc0d9c700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30d22000 CR3: 00000000a717b000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: fffffffffffffffe DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __lock_acquire+0x110b/0x2ae0 kernel/locking/lockdep.c:4441
 lock_acquire+0x148/0x720 kernel/locking/lockdep.c:5029
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xaa/0xd0 kernel/locking/spinlock.c:159
 debug_object_activate+0x62/0x5f0 lib/debugobjects.c:636
 debug_hrtimer_activate kernel/time/hrtimer.c:420 [inline]
 debug_activate kernel/time/hrtimer.c:480 [inline]
 enqueue_hrtimer kernel/time/hrtimer.c:969 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1541 [inline]
 __hrtimer_run_queues+0x510/0x930 kernel/time/hrtimer.c:1588
 hrtimer_interrupt+0x373/0xd60 kernel/time/hrtimer.c:1650
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 __sysvec_apic_timer_interrupt+0xf0/0x260 arch/x86/kernel/apic/apic.c:1097
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_sysvec_on_irqstack arch/x86/include/asm/irq_stack.h:37 [inline]
 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:89 [inline]
 sysvec_apic_timer_interrupt+0x94/0xf0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:770 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x63/0x90 kernel/locking/spinlock.c:191
Code: b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 0c 48 c7 c7 b8 17 6d 89 e8 4c c2 66 f9 48 83 3d 3c f8 1e 01 00 74 2a 4c 89 f7 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 9e b3 02 f9 65 8b 05 73 de b3 77
RSP: 0018:ffffc9000f187cb8 EFLAGS: 00000282
RAX: 1ffffffff12da2f7 RBX: ffffffff897034c0 RCX: dffffc0000000000
RDX: ffffc9000c9ff000 RSI: 0000000000000001 RDI: 0000000000000282
RBP: ffffffff81660ec3 R08: ffffffff817ac190 R09: fffffbfff12e0699
R10: fffffbfff12e0699 R11: 0000000000000000 R12: 000000007fffffff
R13: 0000000000000282 R14: 0000000000000282 R15: ffffc9000f187da8
 timekeeping_inject_offset+0x67d/0x6e0 kernel/time/timekeeping.c:1305
 do_adjtimex+0x3b3/0x990 kernel/time/timekeeping.c:2335
 do_clock_adjtime kernel/time/posix-timers.c:1109 [inline]
 __do_sys_clock_adjtime kernel/time/posix-timers.c:1121 [inline]
 __se_sys_clock_adjtime kernel/time/posix-timers.c:1112 [inline]
 __x64_sys_clock_adjtime+0x17e/0x210 kernel/time/posix-timers.c:1112
 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45dd99
Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fdcc0d9bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 0000000000001e80 RCX: 000000000045dd99
RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000000
RBP: 000000000118bf58 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007ffc3b63874f R14: 00007fdcc0d9c9c0 R15: 000000000118bf2c
rcu: rcu_preempt kthread starved for 9001 jiffies! g79865 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:28896 pid:   10 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:3778 [inline]
 __schedule+0x9b9/0xd20 kernel/sched/core.c:4527