rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=5453, q=27 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294954168-4294943666), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g5453 f0x2 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:28192 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
 schedule+0xb9/0x180 kernel/sched/core.c:6637
 schedule_timeout+0x15c/0x280 kernel/time/timer.c:1965
 rcu_gp_fqs_loop+0x2f2/0x1310 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x95/0x380 kernel/rcu/tree.c:1905
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4280 Comm: syz-executor411 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:__lock_acquire+0x4fa/0x7c50 kernel/locking/lockdep.c:4997
Code: 42 0f b6 04 00 84 c0 0f 85 22 62 00 00 44 8b 75 28 48 8b 44 24 78 44 89 68 20 48 8d 58 24 48 89 d8 48 c1 e8 03 42 0f b6 04 00 <84> c0 4c 8b a4 24 88 00 00 00 0f 85 21 62 00 00 44 89 33 44 89 eb
RSP: 0018:ffffc900001e09c0 EFLAGS: 00000807
RAX: 0000000000000000 RBX: ffff88802b5f8b04 RCX: 0000000000080000
RDX: 0000000000000048 RSI: 0000000000000000 RDI: ffff88802b5f8af0
RBP: ffffc900001e0c10 R08: dffffc0000000000 R09: 0000000000000001
R10: fffffbfff1c3eea6 R11: 1ffffffff1c3eea5 R12: ffff88802b5f8ae0
R13: 00000000000e4048 R14: 0000000000000000 R15: 0000000000000048
FS:  00007fcc7b29e6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 000000007631f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662
 seqcount_lockdep_reader_access+0xc6/0x1c0 include/linux/seqlock.h:102
 ktime_get+0x31/0x270 kernel/time/timekeeping.c:846
 clockevents_program_event+0xe2/0x310 kernel/time/clockevents.c:326
 hrtimer_interrupt+0x59d/0x9c0 kernel/time/hrtimer.c:1891
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
 __sysvec_apic_timer_interrupt+0x153/0x5a0 arch/x86/kernel/apic/apic.c:1124
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
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: f5 ff 0f 1f 00 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 3e 18 42 f7 48 89 df e8 96 dd 42 f7 e8 61 d1 65 f7 fb bf 01 00 00 00 <e8> e6 5a 36 f7 65 8b 05 e7 13 e1 75 85 c0 74 02 5b c3 e8 34 25 df
RSP: 0018:ffffc90003d57bb8 EFLAGS: 00000286
RAX: 9146b8260bc3a300 RBX: ffff88802ddf6f00 RCX: 9146b8260bc3a300
RDX: dffffc0000000000 RSI: ffffffff8a8c0500 RDI: 0000000000000001
RBP: ffff88802ddf7398 R08: dffffc0000000000 R09: ffffed1005bbede1
R10: ffffed1005bbede1 R11: 1ffff11005bbede0 R12: 1ffff11005bbee73
R13: 0000000000000021 R14: dffffc0000000000 R15: 0000000000000000
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x1163/0x1350 kernel/signal.c:2874
 arch_do_signal_or_restart+0xb0/0x1230 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fcc7b2ddf17
Code: 14 25 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89
RSP: 002b:00007fcc7b29e178 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007fcc7b368308 RCX: 00007fcc7b2ddf19
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fcc7b368308
RBP: 00007fcc7b368300 R08: 00007fcc7b29e6c0 R09: 00007fcc7b29e6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcc7b36830c
R13: 0000000000000000 R14: 00007fffd187b970 R15: 00007fffd187ba58
 </TASK>