rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=630c/1/0x4000000000000000 softirq=21305/21305 fqs=0
rcu: 	(detected by 1, t=10506 jiffies, g=12413, q=825 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 1911 Comm: kworker/0:2 Not tainted 6.13.0-rc7-syzkaller-00149-g9bffa1ad25b8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: rcu_gp process_srcu
RIP: 0010:rb_erase_cached include/linux/rbtree.h:123 [inline]
RIP: 0010:timerqueue_del+0x67/0x150 lib/timerqueue.c:57
Code: af 73 f6 49 39 dc 0f 84 af 00 00 00 e8 42 b5 73 f6 4c 8d 65 08 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02 00 <0f> 85 a3 00 00 00 48 39 5d 08 74 58 e8 18 b5 73 f6 48 89 ee 48 89
RSP: 0018:ffffc90000007dd0 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff888144aee340 RCX: ffffffff8b266f50
RDX: 1ffff110170c596b RSI: ffffffff8b266f5e RDI: 0000000000000006
RBP: ffff8880b862cb50 R08: 0000000000000006 R09: 0000000000000001
R10: ffff888144aee340 R11: 0000000000000004 R12: ffff8880b862cb58
R13: 0000000000000000 R14: ffff8880b862ca00 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb01626c270 CR3: 00000000361f8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __remove_hrtimer+0x99/0x290 kernel/time/hrtimer.c:1109
 __run_hrtimer kernel/time/hrtimer.c:1719 [inline]
 __hrtimer_run_queues+0x50b/0xae0 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:delay_tsc+0x32/0xc0 arch/x86/lib/delay.c:79
Code: fd bf 01 00 00 00 41 54 55 53 e8 19 74 3f f6 e8 94 24 01 00 41 89 c4 0f 01 f9 66 90 48 c1 e2 20 48 09 c2 48 89 d5 eb 16 f3 90 <bf> 01 00 00 00 e8 f4 73 3f f6 e8 6f 24 01 00 44 39 e0 75 36 0f 01
RSP: 0018:ffffc900058a7b38 EFLAGS: 00000286
RAX: 0000000080000000 RBX: 000000665279d484 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff8bd1eee0 RDI: 0000000000000001
RBP: 000000665279baee R08: 0000000000000001 R09: ffffed10170e8d59
R10: ffff8880b8746acf R11: 0000000000000002 R12: 0000000000000000
R13: 00000000000036b1 R14: ffffffff9a882640 R15: 0000000000003374
 udelay include/asm-generic/delay.h:64 [inline]
 try_check_zero+0x3c6/0x5a0 kernel/rcu/srcutree.c:1112
 srcu_advance_state kernel/rcu/srcutree.c:1742 [inline]
 process_srcu+0x575/0x1720 kernel/rcu/srcutree.c:1851
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3317 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10505 jiffies! g12413 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=8301
rcu: rcu_preempt kthread starved for 10506 jiffies! g12413 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27872 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6848
 schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>