rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=8529, q=59 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294955450-4294944948), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g8529 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:27752 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5380 [inline]
 __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
 preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:7009
 irqentry_exit+0x67/0x70 kernel/entry/common.c:438
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__timer_delete_sync+0x191/0x2c0 kernel/time/timer.c:1564
Code: 61 10 00 49 89 dc 4d 85 f6 48 bb 00 00 00 00 00 fc ff df 75 07 e8 ff 60 10 00 eb 06 e8 f8 60 10 00 fb 65 44 8b 35 f7 85 8e 7e <44> 89 f6 81 e6 00 00 0f 00 31 ff e8 8f 64 10 00 41 81 e6 00 00 0f
RSP: 0018:ffffc90000167aa0 EFLAGS: 00000293
RAX: ffffffff81752fc8 RBX: dffffc0000000000 RCX: ffff88801ba60000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000167b70 R08: ffffffff8e4a212f R09: 1ffffffff1c94425
R10: dffffc0000000000 R11: fffffbfff1c94426 R12: ffffc90000167ba0
R13: 1ffff9200002cf58 R14: 0000000080000000 R15: 0000000000000000
 timer_delete_sync kernel/time/timer.c:1629 [inline]
 del_timer_sync include/linux/timer.h:200 [inline]
 schedule_timeout+0x16a/0x280 kernel/time/timer.c:2169
 rcu_gp_fqs_loop+0x302/0x1560 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x99/0x380 kernel/rcu/tree.c:1866
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </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: 5793 Comm: syz-executor309 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:check_preemption_disabled+0x6/0x110 lib/smp_processor_id.c:13
Code: cc cc cc cc f3 0f 1e fa 48 c7 c7 20 6f fc 8a 48 c7 c6 60 6f fc 8a eb 0c 66 2e 0f 1f 84 00 00 00 00 00 66 90 55 41 57 41 56 53 <48> 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 65 8b 05 2d
RSP: 0018:ffffc900044afa70 EFLAGS: 00000046
RAX: 0000000000000001 RBX: ffff888078753c00 RCX: a5300f7617abba00
RDX: 0000000000000000 RSI: ffffffff8aaace60 RDI: ffffffff8afc6f80
RBP: 0000000000000000 R08: ffffc900044afcdf R09: 0000000000000000
R10: ffffc900044afcc0 R11: fffff52000895f9c R12: dffffc0000000000
R13: 0000000000000246 R14: ffffffff8cd2ffe0 R15: 00000000ffffffff
FS:  00007fbb6f1d56c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbb6f241720 CR3: 000000007b3d8000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
 lock_is_held_type+0x104/0x190 kernel/locking/lockdep.c:5826
 lock_is_held include/linux/lockdep.h:288 [inline]
 __might_resched+0xf6/0x610 kernel/sched/core.c:10170
 __might_fault+0x71/0x120 mm/memory.c:5966
 clear_rseq_cs kernel/rseq.c:279 [inline]
 rseq_ip_fixup kernel/rseq.c:313 [inline]
 __rseq_handle_notify_resume+0x563/0x1170 kernel/rseq.c:351
 rseq_handle_notify_resume include/linux/sched.h:2364 [inline]
 rseq_signal_deliver include/linux/sched.h:2372 [inline]
 setup_rt_frame arch/x86/kernel/signal.c:212 [inline]
 handle_signal arch/x86/kernel/signal.c:267 [inline]
 arch_do_signal_or_restart+0x3bb/0x7b0 arch/x86/kernel/signal.c:312
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xf6/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fbb6f215057
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:00007fbb6f1d5178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 00000000000000ca RBX: 00007fbb6f29f328 RCX: 00007fbb6f215059
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fbb6f29f328
RBP: 00007fbb6f29f320 R08: 00007fbb6f1d56c0 R09: 00007fbb6f1d56c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbb6f29f32c
R13: 0000000000000000 R14: 00007ffcd8b16ae0 R15: 00007ffcd8b16bc8
 </TASK>