rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=cc2/1/0x4000000000000000 softirq=61179/61179 fqs=1 
	(detected by 1, t=10502 jiffies, g=108701, q=30)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 23402 Comm: syz-executor.0 Not tainted 5.9.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:rcu_read_lock_held_common kernel/rcu/update.c:119 [inline]
RIP: 0010:rcu_read_lock_sched_held+0x17/0xb0 kernel/rcu/update.c:134
Code: 7f be 54 00 eb d3 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 41 54 41 bc 01 00 00 00 e8 a3 f9 c3 06 85 c0 75 06 44 89 e0 41 5c c3 <e8> f4 65 00 00 84 c0 74 69 e8 6b 76 00 00 84 c0 74 60 be ff ff ff
RSP: 0018:ffffc90000007be8 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff815c096e
RDX: fffffbfff16b2d2a RSI: 0000000000000008 RDI: ffffffff8b596948
RBP: ffffffff8d697108 R08: 0000000000000000 R09: ffffffff8b59694f
R10: fffffbfff16b2d29 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f38ab5e8700(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32a25000 CR3: 000000009d25a000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0x843/0xaf0 kernel/locking/lockdep.c:5003
 __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_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+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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:770 [inline]
RIP: 0010:on_each_cpu+0x143/0x1f0 kernel/smp.c:701
Code: 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 aa 00 00 00 48 83 3d d1 42 91 08 00 74 6b e8 72 15 0b 00 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 fe cb e5 ff 31 ff 65 8b 1d 45 d5
RSP: 0018:ffffc900063dfb70 EFLAGS: 00000216
RAX: 0000000000000498 RBX: 0000000000000216 RCX: ffffc900079c9000
RDX: 0000000000040000 RSI: ffffffff816b291e RDI: 0000000000000216
RBP: ffffffff81662df0 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000200 R14: 003b9aca00000000 R15: 0000000000000000
 clock_was_set+0x18/0x20 kernel/time/hrtimer.c:876
 timekeeping_inject_offset+0x436/0x570 kernel/time/timekeeping.c:1308
 do_adjtimex+0x28f/0xa30 kernel/time/timekeeping.c:2335
 do_clock_adjtime kernel/time/posix-timers.c:1109 [inline]
 __do_sys_clock_adjtime+0x163/0x270 kernel/time/posix-timers.c:1121
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e179
Code: 3d b2 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 0b b2 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f38ab5e7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 0000000000001e80 RCX: 000000000045e179
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000000
RBP: 000000000118cf78 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffcef8cfecf R14: 00007f38ab5e89c0 R15: 000000000118cf4c
rcu: rcu_preempt kthread starved for 10500 jiffies! g108701 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: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:1890 [inline]
 rcu_gp_kthread+0xb2c/0x1ca0 kernel/rcu/tree.c:2060
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294