rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=2c5c/1/0x4000000000000000 softirq=64046/64046 fqs=0
rcu: 	(detected by 0, t=10502 jiffies, g=68933, q=360 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 15087 Comm: syz.7.2561 Not tainted 6.14.0-rc1-next-20250207-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:debug_spin_unlock kernel/locking/spinlock_debug.c:103 [inline]
RIP: 0010:do_raw_spin_unlock+0xa2/0x8b0 kernel/locking/spinlock_debug.c:141
Code: 10 4d 89 ec 49 c1 ec 03 41 80 3c 1c 00 74 08 4c 89 ef e8 81 11 8a 00 65 48 8b 2c 25 80 d6 03 00 49 39 6d 00 0f 85 36 02 00 00 <4d> 8d 77 08 4c 89 f3 48 c1 eb 03 48 b8 00 00 00 00 00 fc ff df 0f
RSP: 0018:ffffc90000a18b20 EFLAGS: 00000046
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff819c5328
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff9a65e190
RBP: ffff888030881e00 R08: ffffffff9a65e193 R09: 1ffffffff34cbc32
R10: dffffc0000000000 R11: fffffbfff34cbc33 R12: 1ffffffff34cbc34
R13: ffffffff9a65e1a0 R14: ffffc90000a18ba0 R15: ffffffff9a65e190
FS:  00007f396ae9e6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000400000003c80 CR3: 00000000361d4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:150 [inline]
 _raw_spin_unlock_irqrestore+0x81/0x140 kernel/locking/spinlock.c:194
 debug_object_deactivate+0x2d5/0x390 lib/debugobjects.c:888
 debug_hrtimer_deactivate kernel/time/hrtimer.c:460 [inline]
 debug_deactivate+0x1b/0x220 kernel/time/hrtimer.c:502
 __run_hrtimer kernel/time/hrtimer.c:1769 [inline]
 __hrtimer_run_queues+0x305/0xd30 kernel/time/hrtimer.c:1865
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1927
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
 </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 7a 3a 9e f5 48 89 df e8 b2 81 9f f5 e8 9d 7c ca f5 fb bf 01 00 00 00 <e8> f2 e6 90 f5 65 8b 05 53 05 07 74 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc9000554fd00 EFLAGS: 00000286
RAX: abff499e44649b00 RBX: ffff88802137e088 RCX: ffffffff9a412903
RDX: dffffc0000000000 RSI: ffffffff8c0aa920 RDI: 0000000000000001
RBP: 00000000ffffff83 R08: ffffffff901bb677 R09: 1ffffffff20376ce
R10: dffffc0000000000 R11: fffffbfff20376cf R12: ffff88802137e000
R13: 7fffffffffffffff R14: 0000000000000003 R15: ffff88802137e080
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 do_timerfd_settime+0xccf/0xfb0 fs/timerfd.c:523
 __do_sys_timerfd_settime fs/timerfd.c:569 [inline]
 __se_sys_timerfd_settime fs/timerfd.c:560 [inline]
 __x64_sys_timerfd_settime+0x16f/0x220 fs/timerfd.c:560
 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: 0033:0x7f3969f8cde9
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:00007f396ae9e038 EFLAGS: 00000246 ORIG_RAX: 000000000000011e
RAX: ffffffffffffffda RBX: 00007f396a1a5fa0 RCX: 00007f3969f8cde9
RDX: 0000400000000000 RSI: 0000000000000003 RDI: 0000000000000003
RBP: 00007f396a00e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f396a1a5fa0 R15: 00007ffffea3a228
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g68933 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=35272
rcu: rcu_preempt kthread starved for 10502 jiffies! g68933 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:25104 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5377 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6764
 __schedule_loop kernel/sched/core.c:6841 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6856
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2024
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2226
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>