rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 1, t=10502 jiffies, g=10369, q=160)
rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294957704-4294947201), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10504 jiffies! g10369 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:26960 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6799
 irqentry_exit+0x63/0x70 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__timer_delete_sync+0x175/0x290 kernel/time/timer.c:1511
Code: 00 4d 85 f6 75 16 e8 1a c9 10 00 eb 15 e8 13 c9 10 00 e8 ce 10 54 08 4d 85 f6 74 ea e8 04 c9 10 00 fb 65 44 8b 35 b3 17 9a 7e <44> 89 f6 81 e6 00 00 0f 00 31 ff e8 4b cc 10 00 41 81 e6 00 00 0f
RSP: 0018:ffffc90000d47ac0 EFLAGS: 00010293
RAX: ffffffff8168580c RBX: ffffc90000d47bc0 RCX: ffff88813fe2bb80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000d47b90 R08: ffffffff8d89e36f R09: 1ffffffff1b13c6d
R10: dffffc0000000000 R11: fffffbfff1b13c6e R12: 1ffff920001a8f5c
R13: dffffc0000000000 R14: 0000000080000000 R15: 0000000000000000
 timer_delete_sync kernel/time/timer.c:1576 [inline]
 del_timer_sync include/linux/timer.h:200 [inline]
 schedule_timeout+0x18e/0x2d0 kernel/time/timer.c:2118
 rcu_gp_fqs_loop+0x2be/0x11d0 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0x9b/0x370 kernel/rcu/tree.c:2145
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 14 Comm: ksoftirqd/0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:3681 [inline]
RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:3701 [inline]
RIP: 0010:validate_chain kernel/locking/lockdep.c:3756 [inline]
RIP: 0010:__lock_acquire+0x1420/0x7d10 kernel/locking/lockdep.c:5012
Code: b8 eb 83 b5 80 46 86 c8 61 49 0f af c4 48 c1 e8 2d 48 8d 1c c5 00 40 d4 8f 48 89 d8 48 c1 e8 03 48 89 44 24 50 42 80 3c 00 00 <74> 12 48 89 df e8 36 13 61 00 49 b8 00 00 00 00 00 fc ff df 48 89
RSP: 0018:ffffc900000077a0 EFLAGS: 00000046
RAX: 1ffffffff1fe2bab RBX: ffffffff8ff15d58 RCX: ffffffff815d18cc
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff901d40c0
RBP: ffffc900000079f0 R08: dffffc0000000000 R09: 1ffffffff203a818
R10: dffffc0000000000 R11: fffffbfff203a819 R12: 6f4443dd752d6c33
R13: ffff88813fe29dc0 R14: 00000000752d6c33 R15: ffff88813fe2a970
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 000000005960c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
 _raw_spin_lock_nested+0x2e/0x40 kernel/locking/spinlock.c:368
 raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475
 raw_spin_rq_lock kernel/sched/sched.h:1326 [inline]
 rq_lock kernel/sched/sched.h:1621 [inline]
 ttwu_queue kernel/sched/core.c:3840 [inline]
 try_to_wake_up+0x533/0x1050 kernel/sched/core.c:4165
 signal_wake_up_state kernel/signal.c:770 [inline]
 signal_wake_up include/linux/sched/signal.h:427 [inline]
 complete_signal+0x60b/0xa20 kernel/signal.c:1062
 send_sigqueue+0x3e9/0x620 kernel/signal.c:1999
 posix_timer_event kernel/time/posix-timers.c:360 [inline]
 posix_timer_fn+0x16a/0x3d0 kernel/time/posix-timers.c:386
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x4f2/0xb70 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x3bb/0x8d0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:finish_lock_switch+0x134/0x280 kernel/sched/core.c:4804
Code: be ff ff ff ff e8 6c 01 68 08 85 c0 74 4a 4d 85 ff 75 66 0f 1f 44 00 00 48 89 df e8 16 6d 71 08 e8 f1 e2 2a 00 fb 48 83 c4 08 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 48 89 df e8 c9 09 fe ff 43 80 3c
RSP: 0018:ffffc90000d37a28 EFLAGS: 00000286
RAX: 06c502e0ad049a00 RBX: ffff8880b903a340 RCX: 06c502e0ad049a00
RDX: dffffc0000000000 RSI: ffffffff8a2b2780 RDI: ffffffff8a79f980
RBP: 1ffff11017207613 R08: ffff8880b903a343 R09: 1ffff11017207468
R10: dffffc0000000000 R11: ffffed1017207469 R12: 1ffff110172075c1
R13: dffffc0000000000 R14: ffff8880b903ae08 R15: 0000000000000000
 finish_task_switch+0x12f/0x640 kernel/sched/core.c:4921
 context_switch kernel/sched/core.c:5052 [inline]
 __schedule+0x11f7/0x43c0 kernel/sched/core.c:6395
 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6799
 irqentry_exit+0x63/0x70 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:preempt_schedule+0xb5/0xd0 kernel/sched/core.c:6597
Code: f8 75 29 48 c7 04 24 0e 36 e0 45 4a c7 04 33 00 00 00 00 65 48 8b 04 25 28 00 00 00 48 3b 44 24 58 75 10 48 8d 65 f0 5b 41 5e <5d> c3 e8 14 00 00 00 eb d0 e8 2d ba f7 ff 66 2e 0f 1f 84 00 00 00
RSP: 0018:ffffc90000d37e10 EFLAGS: 00000246
RAX: 06c502e0ad049a00 RBX: dffffc0000000000 RCX: ffffffff89c4af45
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88813fe29dc0
RBP: ffffc90000d37e10 R08: ffff88813fe29dc7 R09: 1ffff11027fc53b8
R10: dffffc0000000000 R11: ffffed1027fc53b9 R12: ffff88813fe29dd8
R13: ffff88813fe2b540 R14: 1ffff11027fc56a8 R15: ffffffff81496790
 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
 smpboot_thread_fn+0x5c1/0x970 kernel/smpboot.c:163
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>