rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=55a/1/0x4000000000000000 softirq=49150/49151 fqs=49 
	(detected by 0, t=10502 jiffies, g=73493, q=1515)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 25007 Comm: syz-executor.0 Not tainted 5.8.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:214 [inline]
RIP: 0010:test_bit include/asm-generic/bitops/instrumented-non-atomic.h:111 [inline]
RIP: 0010:hlock_class kernel/locking/lockdep.c:179 [inline]
RIP: 0010:mark_lock+0x10a/0x1b00 kernel/locking/lockdep.c:3937
Code: 8b 5d 00 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 f0 74 3a 8b be 08 00 00 00 e8 ae 58 59 00 48 0f a3 1d b6 5c e0 09 <4c> 89 74 24 08 72 32 48 c7 c0 30 4d 7b 8b 48 c1 e8 03 48 bb 00 00
RSP: 0018:ffffc90000da8a00 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff815a1832
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8b3a74f0
RBP: ffffc90000da8b00 R08: dffffc0000000000 R09: fffffbfff1674e9f
R10: fffffbfff1674e9f R11: 0000000000000000 R12: 0000000000000008
R13: ffff888059f72b98 R14: ffff888059f72280 R15: 0000000000000100
FS:  00007fa0a0c99700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000078c000 CR3: 0000000050110000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 mark_usage kernel/locking/lockdep.c:3885 [inline]
 __lock_acquire+0xbaf/0x2c30 kernel/locking/lockdep.c:4334
 lock_acquire+0x160/0x720 kernel/locking/lockdep.c:4959
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x9e/0xc0 kernel/locking/spinlock.c:159
 debug_object_activate+0x62/0x5f0 lib/debugobjects.c:636
 debug_hrtimer_activate kernel/time/hrtimer.c:416 [inline]
 debug_activate kernel/time/hrtimer.c:476 [inline]
 enqueue_hrtimer kernel/time/hrtimer.c:965 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1537 [inline]
 __hrtimer_run_queues+0x510/0x930 kernel/time/hrtimer.c:1584
 hrtimer_interrupt+0x373/0xd60 kernel/time/hrtimer.c:1646
 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_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 sysvec_apic_timer_interrupt+0xb9/0x130 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:585
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+0xa5/0xd0 kernel/locking/spinlock.c:191
Code: b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 0c 48 c7 c7 f8 c7 4b 89 e8 5a 41 93 f9 48 83 3d 1a 68 2b 01 00 74 2c 4c 89 f7 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 2c 39 30 f9 65 8b 05 11 9e e1 77
RSP: 0018:ffffc900016d7ca8 EFLAGS: 00000282
RAX: 1ffffffff12978ff RBX: ffffffff894ee3c8 RCX: dffffc0000000000
RDX: ffffc90001fba000 RSI: 000000000000006c RDI: 0000000000000282
RBP: ffffffff8165a91c R08: ffffffff817a3350 R09: fffffbfff129dc7a
R10: fffffbfff129dc7a R11: 0000000000000000 R12: 003b9aca00000000
R13: ffffc900016d7d98 R14: 0000000000000282 R15: dffffc0000000000
 timekeeping_inject_offset+0x5e1/0x610 kernel/time/timekeeping.c:1302
 do_adjtimex+0x3ac/0x8f0 kernel/time/timekeeping.c:2332
 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+0x73/0xe0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c369
Code: 8d b6 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 5b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa0a0c98c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 0000000000001dc0 RCX: 000000000045c369
RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000000
RBP: 000000000078bfd8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bfac
R13: 00007fff4fc7ce8f R14: 00007fa0a0c999c0 R15: 000000000078bfac
rcu: rcu_preempt kthread starved for 10403 jiffies! g73493 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
rcu_preempt     R  running task    28896    10      2 0x00004000
Call Trace:
 context_switch kernel/sched/core.c:3458 [inline]
 __schedule+0x851/0xcf0 kernel/sched/core.c:4219