rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10507 jiffies, g=9897, q=25105 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 2552 (4294983683-4294981131), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 2552 jiffies! g9897 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R
  running task     stack:27368 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1190/0x5de0 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:7058
 schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1ea/0xb00 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x270/0x380 kernel/rcu/tree.c:2285
 kthread+0x3c2/0x780 kernel/kthread.c:463
 ret_from_fork+0x56a/0x730 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 6044 Comm: kworker/u8:7 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: events_unbound toggle_allocation_gate

RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline]
RIP: 0010:smp_call_function_many_cond+0xdfd/0x1600 kernel/smp.c:877
Code: 57 48 8b 54 24 10 4c 89 74 24 10 49 89 d5 48 89 d5 48 89 54 24 18 49 c1 ed 03 83 e5 07 4d 01 e5 83 c5 03 e8 d5 ff 0b 00 f3 90 <41> 0f b6 45 00 40 38 c5 7c 08 84 c0 0f 85 e0 05 00 00 8b 43 08 31
RSP: 0018:ffffc90003427888 EFLAGS: 00000293

RAX: 0000000000000000 RBX: ffff8880b853fe80 RCX: ffffffff81af9d91
RDX: ffff8880754c4880 RSI: ffffffff81af9d6b RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000
R13: ffffed10170a7fd1 R14: 0000000000000001 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8881246b2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c008b16020 CR3: 000000000e380000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1044
 on_each_cpu include/linux/smp.h:71 [inline]
 smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2653 [inline]
 smp_text_poke_batch_finish+0x27b/0xdb0 arch/x86/kernel/alternative.c:2863
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 jump_label_update+0x376/0x550 kernel/jump_label.c:919
 static_key_enable_cpuslocked+0x1b7/0x270 kernel/jump_label.c:210
 static_key_enable+0x1a/0x20 kernel/jump_label.c:223
 toggle_allocation_gate mm/kfence/core.c:850 [inline]
 toggle_allocation_gate+0xfa/0x280 mm/kfence/core.c:842
 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c2/0x780 kernel/kthread.c:463
 ret_from_fork+0x56a/0x730 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_ctl_callback - usb_submit_urb failed -19
yealink 3-1:36.0: urb_ctl_callback - urb status -71
yealink 3-1:36.0: urb_ctl_callback - urb status -71
yealink 3-1:36.0: urb_ctl_callback - urb status -71
yealink 3-1:36.0: urb_ctl_callback - urb status -71
yealink 3-1:36.0: urb_ctl_callback - urb status -71
yealink 3-1:36.0: urb_ctl_callback - urb status -71
yealink 3-1:36.0: urb_ctl_callback - urb status -71
yealink 3-1:36.0: urb_ctl_callback - urb status -71
yealink 3-1:36.0: urb_irq_callback - urb status -71
yealink 3-1:36.0: unexpected response 0
yealink 3-1:36.0: urb_ctl_callback - urb status -71
yealink 3-1:36.0: urb_irq_callback - urb status -71
yealink 3-1:36.0: unexpected response 0
yealink 3-1:36.0: urb_ctl_callback - urb status -71
yealink 3-1:36.0: urb_ctl_callback - urb status -71
yealink 3-1:36.0: urb_ctl_callback - urb status -71
yealink 3-1:36.0: urb_ctl_callback - urb status -71
yealink 3-1:36.0: urb_irq_callback - urb status -71
yealink 3-1:36.0: unexpected response 0
yealink 3-1:36.0: urb_ctl_callback - urb status -71
yealink 3-1:36.0: urb_irq_callback - urb status -71
yealink 3-1:36.0: unexpected response 0
yealink 3-1:36.0: urb_irq_callback - usb_submit_urb failed -19