rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=12089, q=118 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294958277-4294947774), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10504 jiffies! g12089 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:27736 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6874
 irqentry_exit+0x63/0x70 kernel/entry/common.c:439
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__timer_delete_sync+0x1a8/0x2e0 kernel/time/timer.c:1564
Code: 00 4d 85 f6 75 16 e8 67 9a 10 00 eb 15 e8 60 9a 10 00 e8 eb ea bb 08 4d 85 f6 74 ea e8 51 9a 10 00 fb 65 44 8b 35 00 95 90 7e <44> 89 f6 81 e6 00 00 0f 00 31 ff e8 98 9d 10 00 41 81 e6 00 00 0f
RSP: 0018:ffffc90000157ae0 EFLAGS: 00000293
RAX: ffffffff8171da3f RBX: ffffc90000157be0 RCX: ffff88813fef5940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000157bb0 R08: ffffffff8e1fdeef R09: 1ffffffff1c3fbdd
R10: dffffc0000000000 R11: fffffbfff1c3fbde R12: ffffffff8171d9aa
R13: 1ffff9200002af60 R14: 0000000080000000 R15: 0000000000000000
 timer_delete_sync kernel/time/timer.c:1629 [inline]
 del_timer_sync include/linux/timer.h:200 [inline]
 schedule_timeout+0x18e/0x2d0 kernel/time/timer.c:2169
 rcu_gp_fqs_loop+0x303/0x1340 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x99/0x3b0 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: 5002 Comm: syz.4.132 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:sched_info_arrive kernel/sched/stats.h:233 [inline]
RIP: 0010:sched_info_switch kernel/sched/stats.h:292 [inline]
RIP: 0010:prepare_task_switch kernel/sched/core.c:5053 [inline]
RIP: 0010:context_switch kernel/sched/core.c:5196 [inline]
RIP: 0010:__schedule+0xbce/0x40e0 kernel/sched/core.c:6562
Code: c5 01 00 00 48 8b 44 24 08 48 8d 98 d0 04 00 00 49 89 de 49 c1 ee 03 43 80 3c 3e 00 74 08 48 89 df e8 c6 54 9d f7 48 83 3b 00 <0f> 84 99 01 00 00 48 c7 c0 a4 13 20 8e 48 c1 e8 03 42 0f b6 04 38
RSP: 0018:ffffc9000c76f960 EFLAGS: 00000002
RAX: ffff888019299dc0 RBX: ffff88801929a290 RCX: 1ffff11004cf4003
RDX: 0000000000000000 RSI: ffffffff8a8c2220 RDI: ffffffff8adf0d20
RBP: ffffc9000c76fae8 R08: ffffffff8e1fdeef R09: 1ffffffff1c3fbdd
R10: dffffc0000000000 R11: fffffbfff1c3fbde R12: ffff8880267a0000
R13: ffff8880b8f3ab00 R14: 1ffff11003253452 R15: dffffc0000000000
FS:  00007feceb6b56c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7918961d80 CR3: 0000000056078000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 schedule+0xb9/0x180 kernel/sched/core.c:6638
 futex_wait_queue+0x134/0x1b0 kernel/futex/waitwake.c:355
 futex_wait+0x1e8/0x5e0 kernel/futex/waitwake.c:656
 do_futex+0x310/0x320 kernel/futex/syscalls.c:134
 __do_sys_futex kernel/futex/syscalls.c:211 [inline]
 __se_sys_futex+0x381/0x410 kernel/futex/syscalls.c:192
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fecea79c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007feceb6b50e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007feceaa15fa8 RCX: 00007fecea79c819
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007feceaa15fa8
RBP: 00007feceaa15fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007feceaa16038 R14: 00007ffc91207e70 R15: 00007ffc91207f58
 </TASK>