rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=11177, q=527 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294961636-4294951133), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10504 jiffies! g11177 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:27224 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5360 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6964
 __schedule_loop kernel/sched/core.c:7046 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7061
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 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:
CPU: 1 UID: 0 PID: 5183 Comm: kworker/u9:1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: hci2 hci_cmd_timeout
RIP: 0010:finish_task_switch+0x26b/0x950 kernel/sched/core.c:5228
Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 7f c5 fe 09 e8 4a 52 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 58 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc9000f4a7678 EFLAGS: 00000286
RAX: 0d5c31fba5037000 RBX: 0000000000000000 RCX: 0d5c31fba5037000
RDX: 0000000000000006 RSI: ffffffff8dc89575 RDI: ffffffff8c053d60
RBP: ffffc9000f4a76d0 R08: ffffffff8fe4db77 R09: 1ffffffff1fc9b6e
R10: dffffc0000000000 R11: fffffbfff1fc9b6f R12: ffff88807c878000
R13: dffffc0000000000 R14: ffff888027493c80 R15: ffff8880b873ab98
FS:  0000000000000000(0000) GS:ffff8881258a2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 000000005c100000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5363 [inline]
 __schedule+0x17a0/0x4cc0 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:process_one_work kernel/workqueue.c:3238 [inline]
RIP: 0010:process_scheduled_works+0x9cd/0x17b0 kernel/workqueue.c:3346
Code: 89 df e8 b6 12 99 00 48 8b 3b 48 8d 05 00 00 00 00 31 f6 31 d2 31 c9 41 b8 01 00 00 00 45 31 c9 50 e8 a7 15 12 00 48 83 c4 08 <eb> 19 e8 5c 76 34 00 c7 44 24 10 00 00 00 00 83 7c 24 3c 00 74 8a
RSP: 0018:ffffc9000f4a7a60 EFLAGS: 00000296
RAX: 0d5c31fba5037000 RBX: ffff888032e07170 RCX: 0d5c31fba5037000
RDX: 0000000000000000 RSI: ffffffff8de7b578 RDI: ffffffff8c053d60
RBP: ffffc9000f4a7c50 R08: 0000000000000000 R09: ffffffff818ba2a4
R10: dffffc0000000000 R11: fffffbfff1fc9b6f R12: ffff8880226f8000
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88807a664008
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 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>