rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=621/1/0x4000000000000000 softirq=263943/263943 fqs=0 
	(detected by 0, t=10502 jiffies, g=476033, q=28)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 1 Comm: systemd Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_preemption_disabled+0x51/0x1c0
Code: 65 8b 1d ca a9 02 76 65 8b 2d 33 04 03 76 89 ee 81 e6 ff ff ff 7f 31 ff 0f 1f 44 00 00 81 e5 ff ff ff 7f 74 2a 0f 1f 44 00 00 <65> 48 8b 04 25 28 00 00 00 48 3b 44 24 08 0f 85 52 01 00 00 89 d8
RSP: 0018:ffffc90000dc0a10 EFLAGS: 00000006
RAX: 15ced19072202400 RBX: 0000000000000001 RCX: 0000000080010002
RDX: 0000000000000000 RSI: 0000000000010003 RDI: 0000000000000000
RBP: 0000000000010003 R08: dffffc0000000000 R09: fffffbfff1bf9dae
R10: fffffbfff1bf9dae R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff920001b8174 R14: ffffffff8ad49760 R15: ffffffff8ad49720
FS:  00007f5feb183500(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556f1f313348 CR3: 000000007f014000 CR4: 00000000003506e0
Call Trace:
 <IRQ>
 rcu_lockdep_current_cpu_online+0x36/0x130 kernel/rcu/tree.c:1169
 rcu_read_lock_held_common kernel/rcu/update.c:112 [inline]
 rcu_read_lock_sched_held+0x74/0x130 kernel/rcu/update.c:123
 trace_lock_release+0x4f/0x150 include/trace/events/lock.h:58
 lock_release+0x82/0x810 kernel/locking/lockdep.c:5636
 rcu_read_unlock include/linux/rcupdate.h:721 [inline]
 advance_sched+0x7be/0x930 net/sched/sch_taprio.c:765
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x50b/0xa60 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: f1 52 fd ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 1e d9 63 f7 48 89 df e8 26 8a 65 f7 e8 e1 d6 88 f7 fb bf 01 00 00 00 <e8> b6 e5 57 f7 65 8b 05 e7 69 00 76 85 c0 74 02 5b c3 0f 1f 44 00
RSP: 0018:ffffc90000c67d20 EFLAGS: 00000282
RAX: 15ced19072202400 RBX: ffff88807e1cc488 RCX: ffffffff90b86903
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff818ade63 R09: ffffed10173674ab
R10: ffffed10173674ab R11: 0000000000000000 R12: ffff88807e1cc4e6
R13: 7fffffffffffffff R14: ffff88807e1cc480 R15: 0000000000000003
 spin_unlock_irq include/linux/spinlock.h:400 [inline]
 do_timerfd_settime+0xd00/0xff0 fs/timerfd.c:521
 __do_sys_timerfd_settime fs/timerfd.c:567 [inline]
 __se_sys_timerfd_settime fs/timerfd.c:558 [inline]
 __x64_sys_timerfd_settime+0x16b/0x220 fs/timerfd.c:558
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f5fe975a7ba
Code: 48 8b 0d e1 f6 2a 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 1e 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d ae f6 2a 00 f7 d8 64 89 01 48
RSP: 002b:00007ffee7a455d8 EFLAGS: 00000246 ORIG_RAX: 000000000000011e
RAX: ffffffffffffffda RBX: 0000556f1f2a89a0 RCX: 00007f5fe975a7ba
RDX: 00007ffee7a455e0 RSI: 0000000000000003 RDI: 0000000000000007
RBP: 00007ffee7a45640 R08: 0000000000000020 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffee7a45638
R13: 0000556f1da7bec0 R14: 0000556f1da4da20 R15: 0000000000000002
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g476033 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=200479
rcu: rcu_preempt kthread starved for 10502 jiffies! g476033 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:26360 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4969 [inline]
 __schedule+0xb72/0x1460 kernel/sched/core.c:6250
 schedule+0x12b/0x1f0 kernel/sched/core.c:6323
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1881
 rcu_gp_fqs_loop+0x1fd/0x770 kernel/rcu/tree.c:1955
 rcu_gp_kthread+0xa5/0x350 kernel/rcu/tree.c:2128
 kthread+0x468/0x490 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
----------------
Code disassembly (best guess):
   0:	65 8b 1d ca a9 02 76 	mov    %gs:0x7602a9ca(%rip),%ebx        # 0x7602a9d1
   7:	65 8b 2d 33 04 03 76 	mov    %gs:0x76030433(%rip),%ebp        # 0x76030441
   e:	89 ee                	mov    %ebp,%esi
  10:	81 e6 ff ff ff 7f    	and    $0x7fffffff,%esi
  16:	31 ff                	xor    %edi,%edi
  18:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  1d:	81 e5 ff ff ff 7f    	and    $0x7fffffff,%ebp
  23:	74 2a                	je     0x4f
  25:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
* 2a:	65 48 8b 04 25 28 00 	mov    %gs:0x28,%rax <-- trapping instruction
  31:	00 00
  33:	48 3b 44 24 08       	cmp    0x8(%rsp),%rax
  38:	0f 85 52 01 00 00    	jne    0x190
  3e:	89 d8                	mov    %ebx,%eax