rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=3ba/1/0x4000000000000000 softirq=89621/89621 fqs=46 
	(detected by 1, t=10502 jiffies, g=158445, q=22064)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8144 Comm: syz-executor.4 Not tainted 5.9.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:trace_hrtimer_start+0x281/0x2c0 include/trace/events/timer.h:195
Code: bb f4 ff 31 f6 65 ff 0d 09 5c 9c 7e 0f 94 c3 40 0f 94 c6 31 ff e8 1f 5b 0f 00 84 db 75 26 e8 46 58 0f 00 5b 41 5c 41 5e 41 5f <5d> c3 e8 38 58 0f 00 0f 0b e9 ea fe ff ff e8 2c 58 0f 00 0f 0b e9
RSP: 0018:ffffc90000007db0 EFLAGS: 00000046
RAX: ffffffff8165a21a RBX: 0000000000000000 RCX: ffff88805d604140
RDX: 0000000080010002 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff11015d04ed9 R08: ffffffff8165a211 R09: fffffbfff131e0f6
R10: fffffbfff131e0f6 R11: 0000000000000000 R12: ffff888097451b40
R13: 1ffff11015d04ed2 R14: dffffc0000000000 R15: 1ffff11012e8a36f
FS:  00007f6f1e9c9700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000051bb20 CR3: 00000000a94f3000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 debug_activate kernel/time/hrtimer.c:481 [inline]
 enqueue_hrtimer kernel/time/hrtimer.c:969 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1541 [inline]
 __hrtimer_run_queues+0x51a/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+0x187/0x1f0 kernel/smp.c:701
Code: c1 e8 03 42 80 3c 20 00 74 0c 48 c7 c7 f8 14 4d 89 e8 ed c7 4a 00 48 83 3d 8d 0b e3 07 00 74 6a e8 ee f0 0a 00 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 0a c9 e6 ff 65 8b 1d 7f f4 97 7e
RSP: 0018:ffffc9000834fca0 EFLAGS: 00000286
RAX: ffffffff816a0972 RBX: 0000000000000286 RCX: 0000000000040000
RDX: ffffc900113b9000 RSI: 00000000000001c9 RDI: 0000000000000286
RBP: ffffffff81660b43 R08: ffffffff817abce0 R09: ffffed1015d04eb1
R10: ffffed1015d04eb1 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000286 R14: 0000000000000000 R15: ffffffff81652800
 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: 0033:0x45d239
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:00007f6f1e9c8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 0000000000001e00 RCX: 000000000045d239
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000000
RBP: 000000000118cf78 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007fffa7cc9b0f R14: 00007f6f1e9c99c0 R15: 000000000118cf4c
rcu: rcu_preempt kthread starved for 8178 jiffies! g158445 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+0x979/0xce0 kernel/sched/core.c:4527