rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=15413, q=688 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294959967-4294949464), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10504 jiffies! g15413 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:28440 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x1190/0x5de0 kernel/sched/core.c:6929
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7256
 irqentry_exit+0x36/0x90 kernel/entry/common.c:211
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:timer_delete_sync+0x4/0x20 kernel/time/timer.c:1674
Code: a2 72 b7 09 eb da e8 7b 9b 7c 00 e9 1b ff ff ff 66 0f 1f 44 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 c3 0e 14 00 48 89 df 31 f6 5b e9 28 fe ff ff 0f 1f
RSP: 0018:ffffc90000157ba0 EFLAGS: 00000246
RAX: 0000000000208040 RBX: 00000000ffffba59 RCX: 0000000000000000
RDX: 0000000000000000 RSI: fffff5200002af51 RDI: ffffc90000157bc8
RBP: 1ffff9200002af75 R08: 0000000000000000 R09: fffffbfff210409a
R10: ffffffff908204d7 R11: 0000000000000001 R12: ffffc90000157bc8
R13: dffffc0000000000 R14: 1ffffffff1c02240 R15: 0000000000000001
 schedule_timeout+0x12b/0x290 kernel/time/sleep_timeout.c:100
 rcu_gp_fqs_loop+0x1ea/0xaf0 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x26d/0x380 kernel/rcu/tree.c:2285
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x675/0x7d0 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: 5881 Comm: kworker/u9:2 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: krxrpcd rxrpc_peer_keepalive_worker
RIP: 0010:asm_sysvec_apic_timer_interrupt+0x0/0x20 arch/x86/include/asm/idtentry.h:697
Code: c6 55 60 0a e9 61 06 00 00 90 f3 0f 1e fa 0f 01 ca fc 6a ff e8 11 05 00 00 48 89 c4 48 89 e7 e8 d6 54 60 0a e9 41 06 00 00 90 <f3> 0f 1e fa 0f 01 ca fc 6a ff e8 f1 04 00 00 48 89 c4 48 89 e7 e8
RSP: 0018:ffffc9000432f848 EFLAGS: 00000006
RAX: 00000000003036ed RBX: ffff88802bf9a480 RCX: 0000000000000006
RDX: 0000000000000000 RSI: ffffffff8da2b0e0 RDI: ffffffff8bf07040
RBP: ffffc9000432f8c0 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff908204d7 R11: 0000000000000001 R12: ffff8880b853a380
R13: ffff888021398000 R14: ffff8880b853a380 R15: ffff8880b853b1b0
FS:  0000000000000000(0000) GS:ffff888124b08000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 0000000035378000 CR4: 00000000003526f0
Call Trace:
 <TASK>
RIP: 0010:finish_task_switch.isra.0+0x22a/0xc10 kernel/sched/core.c:5193
Code: fb 09 00 00 44 8b 05 39 fd f7 0e 45 85 c0 0f 85 be 01 00 00 4c 89 e7 e8 a4 f6 ff ff e8 1f d7 3a 00 fb 65 48 8b 1d de 47 17 12 <48> 8d bb 58 16 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc9000432f878 EFLAGS: 00000206
 context_switch kernel/sched/core.c:5328 [inline]
 __schedule+0x1198/0x5de0 kernel/sched/core.c:6929
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7256
 irqentry_exit+0x36/0x90 kernel/entry/common.c:211
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:rxrpc_peer_keepalive_worker+0xb59/0xef0 net/rxrpc/peer_event.c:358
Code: ff 48 39 d0 74 83 e8 e6 bb 32 f7 e8 21 78 1f f7 48 8b 54 24 50 48 89 c3 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 04 02 <84> c0 74 06 0f 8e 12 03 00 00 41 0f b6 ac 24 b0 dc ff ff 31 ff 89
RSP: 0018:ffffc9000432fb60 EFLAGS: 00000a06
RAX: 0000000000000000 RBX: 00000000000000e4 RCX: ffffffff81a9c9f9
RDX: 1ffff110053c682e RSI: ffffffff81a9ca02 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888029e364c0
R13: 00000000000000ee R14: dffffc0000000000 R15: 0000000000000021
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263
 process_scheduled_works kernel/workqueue.c:3346 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>