rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=0ee/1/0x4000000000000000 softirq=58878/58878 fqs=25 
	(detected by 1, t=10502 jiffies, g=91897, q=355)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 27087 Comm: syz-executor.2 Not tainted 5.9.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4116 [inline]
RIP: 0010:__lock_acquire+0x5bc/0x2ae0 kernel/locking/lockdep.c:4391
Code: 18 48 69 c3 b8 00 00 00 48 8d 98 a0 84 21 8b 48 ba 00 00 00 00 00 fc ff df 48 81 c3 b2 00 00 00 48 89 d8 48 c1 e8 03 8a 04 10 <84> c0 0f 85 37 13 00 00 0f b7 1b 48 8b 44 24 38 8a 04 10 84 c0 0f
RSP: 0018:ffffc90000007b20 EFLAGS: 00000806
RAX: 1ffffffff1643000 RBX: ffffffff8b218552 RCX: ffffffff815a0558
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff8b63a4c0
RBP: ffffc90000007c78 R08: dffffc0000000000 R09: fffffbfff16c7499
R10: fffffbfff16c7499 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888091aceb30 R14: 0000000000000002 R15: 00000000000c4000
FS:  00007fa53335e700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000016a8660 CR3: 00000000a6965000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_acquire+0x148/0x720 kernel/locking/lockdep.c:5029
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xaa/0xd0 kernel/locking/spinlock.c:159
 debug_object_activate+0x62/0x5f0 lib/debugobjects.c:636
 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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:770 [inline]
RIP: 0010:on_each_cpu+0x152/0x1c0 kernel/smp.c:701
Code: b8 17 6d 89 48 c1 e8 03 42 80 3c 20 00 74 0c 48 c7 c7 b8 17 6d 89 e8 cd bf 4a 00 48 83 3d 1d fb 02 08 00 74 5e 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 2f c6 e6 ff 65 8b 1d 54 e1 97 7e
RSP: 0018:ffffc90006517ca0 EFLAGS: 00000282
RAX: 1ffffffff12da2f7 RBX: 0000000000000282 RCX: dffffc0000000000
RDX: ffffc9000cb50000 RSI: 0000000000000001 RDI: 0000000000000282
RBP: ffffffff81661e73 R08: ffffffff817ad120 R09: ffffed1015d04eb1
R10: ffffed1015d04eb1 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000282 R14: ffffffff81653ae0 R15: 0000000000000000
 clock_was_set+0x18/0x20 kernel/time/hrtimer.c:876
 timekeeping_inject_offset+0x682/0x6e0 kernel/time/timekeeping.c:1308
 do_adjtimex+0x3b3/0x990 kernel/time/timekeeping.c:2335
 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+0x31/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d5f9
Code: 5d b4 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa53335dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 0000000000001e80 RCX: 000000000045d5f9
RDX: 0000000000000000 RSI: 0000000020000380 RDI: 0000000000000000
RBP: 000000000118cf78 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffe5cc2a2af R14: 00007fa53335e9c0 R15: 000000000118cf4c
rcu: rcu_preempt kthread starved for 10452 jiffies! g91897 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:28896 pid:   10 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:3778 [inline]
 __schedule+0x9b9/0xd20 kernel/sched/core.c:4527