rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=a084/1/0x4000000000000000 softirq=24997/24997 fqs=0
rcu: 	(detected by 0, t=10502 jiffies, g=35409, q=154 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 10182 Comm: syz.4.2088 Not tainted 6.11.0-rc4-syzkaller-00135-gaa0743a22936 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:trace_lock_acquire include/trace/events/lock.h:24 [inline]
RIP: 0010:lock_acquire+0xdc/0x550 kernel/locking/lockdep.c:5730
Code: 08 0f 83 f4 02 00 00 89 c3 48 89 d8 48 c1 e8 06 48 8d 3c c5 28 c7 f6 8f be 08 00 00 00 e8 dc da 87 00 48 0f a3 1d fc f8 86 0e <73> 16 e8 cd f5 09 00 84 c0 75 0d 80 3d 34 cd 70 0e 00 0f 84 f9 02
RSP: 0018:ffffc90000a18a00 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff816fce24
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8ff6c728
RBP: ffffc90000a18b48 R08: ffffffff8ff6c72f R09: 1ffffffff1fed8e5
R10: dffffc0000000000 R11: fffffbfff1fed8e6 R12: 1ffff92000143148
R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f163cd4f6c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3231eff8 CR3: 000000007d136000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
 debug_object_activate+0x16d/0x510 lib/debugobjects.c:709
 debug_hrtimer_activate kernel/time/hrtimer.c:423 [inline]
 debug_activate kernel/time/hrtimer.c:478 [inline]
 enqueue_hrtimer+0x30/0x3c0 kernel/time/hrtimer.c:1085
 __run_hrtimer kernel/time/hrtimer.c:1706 [inline]
 __hrtimer_run_queues+0x6cb/0xd50 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 5a b2 b7 f5 48 89 df e8 32 f5 b8 f5 e8 2d ad e2 f5 fb bf 01 00 00 00 <e8> 42 c0 aa f5 65 8b 05 b3 94 4b 74 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc9001b967d00 EFLAGS: 00000286
RAX: 1528a0aeffbb7400 RBX: ffff888058e5dc88 RCX: ffffffff94cec903
RDX: dffffc0000000000 RSI: ffffffff8bead560 RDI: 0000000000000001
RBP: 00000000ffffff83 R08: ffffffff8ff6c72f R09: 1ffffffff1fed8e5
R10: dffffc0000000000 R11: fffffbfff1fed8e6 R12: ffff888058e5dc00
R13: 7fffffffffffffff R14: ffff888058e5dc80 R15: 0000000000000003
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 do_timerfd_settime+0xd33/0x1020 fs/timerfd.c:537
 __do_sys_timerfd_settime fs/timerfd.c:583 [inline]
 __se_sys_timerfd_settime fs/timerfd.c:574 [inline]
 __x64_sys_timerfd_settime+0x16f/0x220 fs/timerfd.c:574
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f163bf79e79
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f163cd4f038 EFLAGS: 00000246 ORIG_RAX: 000000000000011e
RAX: ffffffffffffffda RBX: 00007f163c115f80 RCX: 00007f163bf79e79
RDX: 0000000020000080 RSI: 0000000000000003 RDI: 0000000000000003
RBP: 00007f163bfe793e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f163c115f80 R15: 00007fffc209a638
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g35409 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=16866
rcu: rcu_preempt kthread starved for 10502 jiffies! g35409 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:26448 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>