rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=41a/1/0x4000000000000000 softirq=64349/64350 fqs=0 
	(detected by 1, t=10502 jiffies, g=98869, q=72)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 6847 Comm: syz-executor.5 Not tainted 5.9.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lookup_object lib/debugobjects.c:197 [inline]
RIP: 0010:debug_object_activate+0xa5/0x5f0 lib/debugobjects.c:638
Code: 10 fe 48 89 6c 24 20 48 8b 1b 31 ed 48 85 db 75 0e eb 48 66 90 ff c5 48 8b 1b 48 85 db 74 3c 4c 8d 73 18 4d 89 f5 49 c1 ed 03 <43> 80 7c 25 00 00 74 08 4c 89 f7 e8 6b 71 10 fe 4d 39 3e 0f 84 d5
RSP: 0018:ffffc90000007d60 EFLAGS: 00000802
RAX: 1ffffffff1746fb5 RBX: ffff88805d0da850 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90000007cfc
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffff52000000fa0
R10: fffff52000000fa0 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff1100ba1b50d R14: ffff88805d0da868 R15: ffff888060e50b40
FS:  0000000002f51940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000748198 CR3: 0000000065773000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 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_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+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:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x57/0x80 kernel/locking/spinlock.c:199
Code: 00 00 00 00 fc ff df 80 3c 08 00 74 0c 48 c7 c7 08 15 4d 89 e8 ca 64 88 f9 48 83 3d 7a a8 20 01 00 74 25 fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 ef 65 24 f9 65 8b 05 64 91 d5 77 85 c0 74 02 5b
RSP: 0018:ffffc90005467cc8 EFLAGS: 00000286
RAX: 1ffffffff129a2a1 RBX: ffff8880ae8358c0 RCX: dffffc0000000000
RDX: 0000000040000000 RSI: 0000000000000000 RDI: ffffffff882c6c5f
RBP: ffffc90005467d28 R08: ffffffff817abce0 R09: ffffed1015d06b19
R10: ffffed1015d06b19 R11: 0000000000000000 R12: ffff8880ae8358c0
R13: ffff8880a6d3a180 R14: ffff8880ae836308 R15: dffffc0000000000
 finish_task_switch+0x24f/0x550 kernel/sched/core.c:3617
 context_switch kernel/sched/core.c:3781 [inline]
 __schedule+0x981/0xce0 kernel/sched/core.c:4527
 schedule+0x188/0x220 kernel/sched/core.c:4602
 freezable_schedule include/linux/freezer.h:172 [inline]
 do_nanosleep+0x1ae/0x680 kernel/time/hrtimer.c:1883
 hrtimer_nanosleep kernel/time/hrtimer.c:1936 [inline]
 __do_sys_nanosleep kernel/time/hrtimer.c:1970 [inline]
 __se_sys_nanosleep+0x3d5/0x5c0 kernel/time/hrtimer.c:1957
 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45b9a1
Code: 75 14 b8 23 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 84 cf fb ff c3 48 83 ec 08 e8 ea 46 00 00 48 89 04 24 b8 23 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 33 47 00 00 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007ffd1fa611b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000023
RAX: ffffffffffffffda RBX: 00000000000a2413 RCX: 000000000045b9a1
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffd1fa611c0
RBP: 00000000000007dc R08: 0000000000000000 R09: 0000000002f51940
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000006
R13: 00007ffd1fa61210 R14: 00000000000a2384 R15: 00007ffd1fa61220
rcu: rcu_preempt kthread starved for 10502 jiffies! g98869 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:28896 pid:   10 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:3778 [inline]
 __schedule+0x979/0xce0 kernel/sched/core.c:4527