rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=11325, q=635 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10501 (4294957044-4294946543), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g11325 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:27288 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5360 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6964
 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7291
 irqentry_exit+0x6f/0x90 kernel/entry/common.c:211
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:timer_delete_sync+0x5/0x20 kernel/time/timer.c:1674
Code: 11 36 77 00 e9 5a ff ff ff 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 53 <48> 89 fb e8 73 b3 12 00 48 89 df 31 f6 5b eb 1b 66 66 2e 0f 1f 84
RSP: 0018:ffffc90000157a30 EFLAGS: 00000246
RAX: 0000000000208040 RBX: 00000000ffffaef0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8c0503e0 RDI: ffffc90000157a60
RBP: ffffc90000157b30 R08: ffffffff8fe53a37 R09: 1ffffffff1fca746
R10: dffffc0000000000 R11: fffffbfff1fca747 R12: 1ffff9200002af48
R13: 1ffffffff1c42240 R14: ffffc90000157a60 R15: dffffc0000000000
 schedule_timeout+0x133/0x270 kernel/time/sleep_timeout.c:100
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </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 UID: 0 PID: 6106 Comm: syz.2.30 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:futex_wait+0x107/0x360 kernel/futex/waitwake.c:718
Code: 6c 24 0c 44 89 ea e8 28 e4 fe ff 49 89 c4 48 8b 7c 24 10 44 89 ee 8b 54 24 04 48 89 c1 44 8b 44 24 08 e8 0c fb ff ff 41 89 c5 <4d> 85 e4 0f 84 70 01 00 00 4c 89 e7 e8 78 96 f9 ff 4c 89 e7 e8 90
RSP: 0018:ffffc90003adfbe0 EFLAGS: 00000246
RAX: 00000000fffffe00 RBX: ffff88802ede8000 RCX: ffff88802ede8000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88802ede8000
RBP: ffffc90003adfcf0 R08: ffff88802ede8007 R09: 1ffff11005dbd000
R10: dffffc0000000000 R11: ffffed1005dbd001 R12: 0000000000000000
R13: 00000000fffffe00 R14: dffffc0000000000 R15: 1ffff9200075bf80
FS:  00007f9b18ffe6c0(0000) GS:ffff8881258a7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c008528000 CR3: 000000002fd7a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 do_futex+0x333/0x420 kernel/futex/syscalls.c:102
 __do_sys_futex kernel/futex/syscalls.c:179 [inline]
 __se_sys_futex+0x36f/0x400 kernel/futex/syscalls.c:160
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9b1998eba9
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:00007f9b18ffe0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f9b19bd5fa8 RCX: 00007f9b1998eba9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f9b19bd5fa8
RBP: 00007f9b19bd5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9b19bd6038 R14: 00007ffcf0ca2830 R15: 00007ffcf0ca2918
 </TASK>