rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P1953/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=39357, q=1602 ncpus=2)
task:kworker/0:3 state:R running task stack:21120 pid:1953 tgid:1953 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:5402 [inline]
__schedule+0x16f9/0x5500 kernel/sched/core.c:7204
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7528
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x760 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x221/0x350 kernel/locking/lockdep.c:5874
Code: ff ff ff e8 01 f9 95 09 f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 8b e3 f6 10 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 28 ba 0f
RSP: 0018:ffffc9000761e9a0 EFLAGS: 00000286
RAX: 3979b3c5457c8000 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 000000005375eb1c RSI: ffffffff8d9bd406 RDI: ffffffff8babc280
RBP: ffffffff8b3979d0 R08: ffffffff8b3979d0 R09: ffffffff8e1caa00
R10: dffffc0000000000 R11: fffffbfff1f5b63f R12: 0000000000000002
R13: ffffffff8e1caa00 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock include/linux/rcupdate.h:838 [inline]
__rt_spin_lock kernel/locking/spinlock_rt.c:50 [inline]
rt_spin_lock+0x1fc/0x400 kernel/locking/spinlock_rt.c:57
spin_lock include/linux/spinlock_rt.h:45 [inline]
__slab_free+0xf1/0x2a0 mm/slub.c:5592
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4583 [inline]
slab_alloc_node mm/slub.c:4912 [inline]
__do_kmalloc_node mm/slub.c:5308 [inline]
__kmalloc_noprof+0x399/0x7b0 mm/slub.c:5322
_kmalloc_noprof include/linux/slab.h:971 [inline]
usb_alloc_urb+0x46/0x150 drivers/usb/core/urb.c:75
usb_internal_control_msg drivers/usb/core/message.c:110 [inline]
usb_control_msg+0x118/0x3e0 drivers/usb/core/message.c:167
hdpvr_config_call drivers/media/usb/hdpvr/hdpvr-control.c:30 [inline]
hdpvr_set_options+0x840/0xf70 drivers/media/usb/hdpvr/hdpvr-control.c:173
hdpvr_device_init+0x4e/0x480 drivers/media/usb/hdpvr/hdpvr-core.c:206
hdpvr_probe+0x50a/0x930 drivers/media/usb/hdpvr/hdpvr-core.c:334
usb_probe_interface+0x659/0xc70 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x267/0xaf0 drivers/base/dd.c:707
__driver_probe_device+0x1e2/0x350 drivers/base/dd.c:869
driver_probe_device+0x4f/0x240 drivers/base/dd.c:899
__device_attach_driver+0x270/0x410 drivers/base/dd.c:1027
bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500
__device_attach+0x2c8/0x450 drivers/base/dd.c:1099
device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1154
bus_probe_device+0x12d/0x220 drivers/base/bus.c:620
device_add+0x7ec/0xb90 drivers/base/core.c:3702
usb_set_configuration+0x1a87/0x2110 drivers/usb/core/message.c:2268
usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
usb_probe_device+0x1c4/0x3b0 drivers/usb/core/driver.c:291
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x267/0xaf0 drivers/base/dd.c:707
__driver_probe_device+0x1e2/0x350 drivers/base/dd.c:869
driver_probe_device+0x4f/0x240 drivers/base/dd.c:899
__device_attach_driver+0x270/0x410 drivers/base/dd.c:1027
bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500
__device_attach+0x2c8/0x450 drivers/base/dd.c:1099
device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1154
bus_probe_device+0x12d/0x220 drivers/base/bus.c:620
device_add+0x7ec/0xb90 drivers/base/core.c:3702
usb_new_device+0x9f8/0x16e0 drivers/usb/core/hub.c:2695
hub_port_connect drivers/usb/core/hub.c:5567 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
port_event drivers/usb/core/hub.c:5871 [inline]
hub_event+0x2a49/0x4f60 drivers/usb/core/hub.c:5953
process_one_work+0x98b/0x1630 kernel/workqueue.c:3318
process_scheduled_works kernel/workqueue.c:3401 [inline]
worker_thread+0xb49/0x1140 kernel/workqueue.c:3482
kthread+0x389/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 16 Comm: ktimers/0 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)}
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4891 [inline]
RIP: 0010:__lock_acquire+0x577/0x2d10 kernel/locking/lockdep.c:5189
Code: 0c 0e 00 75 13 48 8d 3d 97 b3 0f 0e 48 c7 c6 dd 1f 87 8d 67 48 0f b9 3a 90 31 c9 0f b6 81 c4 00 00 00 84 c0 0f 84 77 ff ff ff <41> 0f b6 f4 0f b6 d0 40 38 c6 0f 42 d6 80 b9 c6 00 00 00 02 0f 84
RSP: 0018:ffffc90000157558 EFLAGS: 00000006
RAX: 0000000000000003 RBX: ffff88801dac8c18 RCX: ffffffff93419118
RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88801dac8cc0 R08: ffffffff8b3979d0 R09: ffffffff8e1caa00
R10: dffffc0000000000 R11: fffffbfff1f5b63f R12: ffffffffffffff05
R13: ffff88801dac8cc0 R14: ffff88801dac8000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff888125c9f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055abb5363190 CR3: 000000000dfb8000 CR4: 00000000003526f0
Call Trace:
lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5870
rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock include/linux/rcupdate.h:838 [inline]
__rt_spin_lock kernel/locking/spinlock_rt.c:50 [inline]
rt_spin_lock+0x1fc/0x400 kernel/locking/spinlock_rt.c:57
spin_lock include/linux/spinlock_rt.h:45 [inline]
usb_anchor_urb+0x29/0x200 drivers/usb/core/urb.c:130
ath9k_hif_usb_reg_in_cb+0x4c8/0x6f0 drivers/net/wireless/ath/ath9k/hif_usb.c:789
__usb_hcd_giveback_urb+0x3b3/0x5e0 drivers/usb/core/hcd.c:1655
dummy_timer+0x8a9/0x47d0 drivers/usb/gadget/udc/dummy_hcd.c:2005
__run_hrtimer kernel/time/hrtimer.c:2032 [inline]
__hrtimer_run_queues+0x405/0xb10 kernel/time/hrtimer.c:2096
hrtimer_run_softirq+0x18f/0x260 kernel/time/hrtimer.c:2113
handle_softirqs+0x1de/0x6d0 kernel/softirq.c:626
__do_softirq kernel/softirq.c:660 [inline]
run_ktimerd+0x69/0x100 kernel/softirq.c:1155
smpboot_thread_fn+0x541/0xa50 kernel/smpboot.c:160
kthread+0x389/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245