rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=cbe/1/0x4000000000000000 softirq=82120/82121 fqs=13 
	(detected by 0, t=10502 jiffies, g=145993, q=177)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9912 Comm: syz-executor.1 Not tainted 5.9.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0x224/0x5780 kernel/locking/lockdep.c:4360
Code: e1 ff 1f 00 00 3b 4c 24 08 75 0c 48 83 7c 24 18 00 0f 85 5d 0c 00 00 48 8b 44 24 28 0f b7 4c 24 08 4e 8d 24 10 49 8d 44 24 20 <66> 81 e1 ff 1f 48 89 c2 48 89 44 24 30 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffffc90000da8ab0 EFLAGS: 00000006
RAX: ffff8880610c6e70 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff8880610c6e28 RSI: 1ffff1100c218dc9 RDI: ffff8880610c6e48
RBP: ffff8880610c6540 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000028 R11: 0000000000000000 R12: ffff8880610c6e50
R13: 0000000000000000 R14: ffffffff8d3a4b88 R15: 0000000000000000
FS:  0000000002b17940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001590004 CR3: 000000006e2d1000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 lock_acquire+0x1f3/0xae0 kernel/locking/lockdep.c:5006
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x94/0xce kernel/locking/spinlock.c:159
 debug_object_deactivate lib/debugobjects.c:710 [inline]
 debug_object_deactivate+0x101/0x300 lib/debugobjects.c:698
 debug_hrtimer_deactivate kernel/time/hrtimer.c:425 [inline]
 debug_deactivate kernel/time/hrtimer.c:486 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1492 [inline]
 __hrtimer_run_queues+0x3cb/0xfc0 kernel/time/hrtimer.c:1588
 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1650
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 __sysvec_apic_timer_interrupt+0x147/0x5f0 arch/x86/kernel/apic/apic.c:1097
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
 </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+0xb2/0xf0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:lock_acquire+0x3e/0xae0 kernel/locking/lockdep.c:4977
Code: fd 53 44 89 c3 48 81 ec b8 00 00 00 48 8d 44 24 18 4c 89 0c 24 48 c7 44 24 18 b3 8a b5 41 48 c1 e8 03 48 89 44 24 08 48 89 c6 <48> b8 00 00 00 00 00 fc ff df 48 c7 44 24 20 24 61 8c 89 48 01 f0
RSP: 0018:ffffc9000817fce0 EFLAGS: 00000a06
RAX: 1ffff9200102ff9f RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 1ffff9200102ff9f RDI: ffff88808343cb28
RBP: ffff88808343cb28 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 __might_fault mm/memory.c:4870 [inline]
 __might_fault+0x152/0x1d0 mm/memory.c:4855
 _copy_to_user+0x29/0x160 lib/usercopy.c:27
 copy_to_user include/linux/uaccess.h:168 [inline]
 put_timespec64+0xb2/0x120 kernel/time/time.c:812
 __do_sys_clock_gettime kernel/time/posix-timers.c:1094 [inline]
 __se_sys_clock_gettime kernel/time/posix-timers.c:1082 [inline]
 __x64_sys_clock_gettime+0x1b6/0x260 kernel/time/posix-timers.c:1082
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x46043a
Code: 25 18 00 00 00 00 74 01 f0 48 0f b1 3d 2f 9a 24 01 48 39 c2 75 da f3 c3 0f 1f 84 00 00 00 00 00 48 63 ff b8 e4 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 f3 c3 0f 1f 40 00 48 c7 c2 d4 ff ff ff f7
RSP: 002b:00007ffef34bc6b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e4
RAX: ffffffffffffffda RBX: 00000000000be841 RCX: 000000000046043a
RDX: 0000000000000000 RSI: 00007ffef34bc6c0 RDI: 0000000000000001
RBP: 00000000000009d8 R08: 0000000000000000 R09: 0000000002b17940
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 00007ffef34bc720 R14: 00000000000be768 R15: 00007ffef34bc730
rcu: rcu_preempt kthread starved for 10476 jiffies! g145993 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:
task:rcu_preempt     state:R  running task     stack:29096 pid:   10 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:3778 [inline]
 __schedule+0xec9/0x2280 kernel/sched/core.c:4527
 schedule+0xd0/0x2a0 kernel/sched/core.c:4602
 schedule_timeout+0x148/0x250 kernel/time/timer.c:1879
 rcu_gp_fqs_loop kernel/rcu/tree.c:1888 [inline]
 rcu_gp_kthread+0xb2c/0x1ca0 kernel/rcu/tree.c:2058
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294