rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=a9a/1/0x4000000000000000 softirq=24128/24130 fqs=2 
	(detected by 1, t=10502 jiffies, g=39829, q=168)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 12921 Comm: syz-executor.1 Not tainted 5.8.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lockdep_hardirqs_off+0x78/0xc0 kernel/locking/lockdep.c:3782
Code: 00 48 89 98 78 08 00 00 8d 51 01 89 90 68 08 00 00 89 90 84 08 00 00 5b c3 65 48 8b 04 25 00 ff 01 00 66 83 b8 cc 08 00 00 00 <75> eb 8b 15 90 24 a6 04 85 d2 75 a6 e8 27 73 69 f9 f6 c4 02 74 9c
RSP: 0018:ffffc90000007d98 EFLAGS: 00000046
RAX: ffff8880554d4240 RBX: ffffffff87f28645 RCX: 0000000000000001
RDX: ffff8880554d4240 RSI: ffffffff817a022d RDI: ffffffff87f28645
RBP: ffff8880ae627780 R08: 0000000000000000 R09: ffffffff8ab186cf
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ae627780
R13: ffff8880ae627980 R14: ffff8880a1708b40 R15: dffffc0000000000
FS:  00007f6390e21700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000051b800 CR3: 000000008e059000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 trace_hardirqs_off+0x17/0x210 kernel/trace/trace_preemptirq.c:76
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline]
 _raw_spin_lock_irq+0x35/0x80 kernel/locking/spinlock.c:167
 __run_hrtimer kernel/time/hrtimer.c:1524 [inline]
 __hrtimer_run_queues+0x252/0xfc0 kernel/time/hrtimer.c:1584
 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1646
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 __sysvec_apic_timer_interrupt+0x142/0x5e0 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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:770 [inline]
RIP: 0010:on_each_cpu+0x149/0x240 kernel/smp.c:701
Code: 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 e6 00 00 00 48 83 3d 6f df 4c 08 00 0f 84 af 00 00 00 e8 cc ee 0a 00 48 89 df 57 9d <0f> 1f 44 00 00 e8 bd ee 0a 00 bf 01 00 00 00 e8 a3 6b e6 ff 31 ff
RSP: 0018:ffffc90001b57b70 EFLAGS: 00000212
RAX: 0000000000001421 RBX: 0000000000000212 RCX: ffffc900042d9000
RDX: 0000000000040000 RSI: ffffffff816954e4 RDI: 0000000000000212
RBP: 0000000000000200 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0036118c6e6619b4 R14: 003b9aca00000000 R15: 0000000000000000
 clock_was_set+0x18/0x20 kernel/time/hrtimer.c:872
 timekeeping_inject_offset+0x436/0x590 kernel/time/timekeeping.c:1305
 do_adjtimex+0x28f/0xa40 kernel/time/timekeeping.c:2332
 do_clock_adjtime kernel/time/posix-timers.c:1109 [inline]
 __do_sys_clock_adjtime+0x155/0x250 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: 0033:0x45ce79
Code: 2d 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 fb b5 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f6390e20c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 0000000000001e00 RCX: 000000000045ce79
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000000
RBP: 000000000118bf58 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007fff9b54458f R14: 00007f6390e219c0 R15: 000000000118bf2c
rcu: rcu_preempt kthread starved for 10498 jiffies! g39829 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:
rcu_preempt     R  running task    29080    10      2 0x00004000
Call Trace:
 context_switch kernel/sched/core.c:3778 [inline]
 __schedule+0x8e5/0x21e0 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:1887 [inline]
 rcu_gp_kthread+0xae5/0x1b50 kernel/rcu/tree.c:2057
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294