rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2632 jiffies s: 9657 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5292 Comm: kworker/0:6 Not tainted 6.11.0-rc5-syzkaller-00081-gd5d547aa7b51 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: usb_hub_wq hub_event
RIP: 0010:arch_stack_walk+0xe4/0x170 arch/x86/kernel/stacktrace.c:27
Code: 89 e7 e8 ff c2 08 00 31 ff 48 89 c3 48 89 c6 e8 22 ad 57 00 48 85 db 74 40 e8 a8 aa 57 00 48 89 de 4c 89 f7 41 ff d5 0f 1f 00 <31> ff 89 c3 89 c6 e8 71 ac 57 00 84 db 74 20 e8 88 aa 57 00 4c 89
RSP: 0018:ffffc900000072c8 EFLAGS: 00000092
RAX: 0000000000000001 RBX: ffffffff81566c05 RCX: ffffffff8134153e
RDX: 1ffff92000000e9b RSI: ffffffff81566c05 RDI: ffffc9000000739c
RBP: ffffc90000007360 R08: 0000000000000007 R09: 0000000000000000
R10: ffffffff81566c05 R11: 0000000000000000 R12: ffffc900000072d0
R13: ffffffff81775bb0 R14: ffffc90000007390 R15: ffff888021110000
FS:  0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fa0eff8 CR3: 000000006100a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2252 [inline]
 slab_free mm/slub.c:4473 [inline]
 kfree+0x12a/0x3b0 mm/slub.c:4594
 dummy_timer+0x1750/0x38d0 drivers/usb/gadget/udc/dummy_hcd.c:1981
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x43/0xb0 arch/x86/kernel/apic/apic.c:1043
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__sanitizer_cov_trace_pc+0x66/0x70 kernel/kcov.c:234
Code: 82 f8 15 00 00 83 f8 02 75 20 48 8b 8a 00 16 00 00 8b 92 fc 15 00 00 48 8b 01 48 83 c0 01 48 39 d0 73 07 48 89 01 48 89 34 c1 <c3> cc cc cc cc 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000007b78 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880601521a0 RCX: ffffffff8924313c
RDX: ffff888021110000 RSI: ffffffff89243154 RDI: 0000000000000007
RBP: ffff88804b455300 R08: 0000000000000007 R09: 0019999999999998
R10: 0000000000000000 R11: 0000000000000000 R12: 00000015798ee228
R13: 0000000000000000 R14: 0000000225c17d04 R15: 0000000000000000
 pie_calculate_probability+0x214/0x850 net/sched/sch_pie.c:343
 fq_pie_timer+0x215/0x5a0 net/sched/sch_fq_pie.c:398
 call_timer_fn+0x1a0/0x610 kernel/time/timer.c:1792
 expire_timers kernel/time/timer.c:1843 [inline]
 __run_timers+0x74b/0xaf0 kernel/time/timer.c:2417
 __run_timer_base kernel/time/timer.c:2428 [inline]
 __run_timer_base kernel/time/timer.c:2421 [inline]
 run_timer_base+0x111/0x190 kernel/time/timer.c:2437
 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2447
 handle_softirqs+0x216/0x8f0 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu kernel/softirq.c:637 [inline]
 irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__slab_alloc_node mm/slub.c:3864 [inline]
RIP: 0010:slab_alloc_node mm/slub.c:4025 [inline]
RIP: 0010:__kmalloc_cache_noprof+0x9e/0x300 mm/slub.c:4184
Code: 0f 95 c0 41 08 c7 0f 85 10 02 00 00 0f 1f 44 00 00 48 c7 44 24 10 00 00 00 00 65 48 8b 05 e2 d1 21 7e 49 03 04 24 48 8b 50 08 <48> 83 78 10 00 48 8b 38 0f 84 eb 01 00 00 48 85 ff 0f 84 e2 01 00
RSP: 0018:ffffc900045b78d0 EFLAGS: 00000286
RAX: ffff8880b9242d90 RBX: 0000000000000c00 RCX: 0000000000000000
RDX: 0000000000024558 RSI: 0000000000000008 RDI: ffff8880211115c4
RBP: ffffc900045b7918 R08: 0000000000000000 R09: fffffbfff20282f3
R10: ffffffff9014179f R11: 0000000000000000 R12: ffff888015841500
R13: 0000000000000c00 R14: 0000000000000008 R15: 0000000000000000
 kmalloc_noprof include/linux/slab.h:681 [inline]
 usb_control_msg+0xbd/0x4b0 drivers/usb/core/message.c:144
 get_port_status drivers/usb/core/hub.c:604 [inline]
 hub_ext_port_status+0x14e/0x670 drivers/usb/core/hub.c:621
 usb_hub_port_status drivers/usb/core/hub.c:671 [inline]
 port_event drivers/usb/core/hub.c:5714 [inline]
 hub_event+0x6e0/0x4e10 drivers/usb/core/hub.c:5903
 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389
 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>
vkms_vblank_simulate: vblank timer overrun