cdc_acm 1-1:1.3: ttyACM0: USB ACM device
BUG: scheduling while atomic: kworker/1:6/5757/0x00010001
locks held by kworker/1:6/5757: 7, on CPU#1:
 #0: ffff8880206eed40 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #0: ffff8880206eed40 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffff8880206eed40 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3352 [inline]
 #0: ffff8880206eed40 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3470
 #1: ffffc900024dfc40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #1: ffffc900024dfc40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #1: ffffc900024dfc40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3352 [inline]
 #1: ffffc900024dfc40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3470
 #2: ffff888021fbc1d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
 #2: ffff888021fbc1d8 (&dev->mutex){....}-{4:4}, at: hub_event+0x184/0x4d30 drivers/usb/core/hub.c:5907
 #3: ffff88801ff4f1d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
 #3: ffff88801ff4f1d8 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x450 drivers/base/dd.c:1073
 #4: ffff88807fbe21a0 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
 #4: ffff88807fbe21a0 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x450 drivers/base/dd.c:1073
 #5: ffffffff901ad7a0 (register_mutex#7){+.+.}-{4:4}, at: class_mutex_constructor include/linux/mutex.h:253 [inline]
 #5: ffffffff901ad7a0 (register_mutex#7){+.+.}-{4:4}, at: usb_audio_probe+0x5e6/0x2240 sound/usb/card.c:985
 #6: ffff88802b9f0160 (&rmidi->open_mutex){+.+.}-{4:4}, at: class_mutex_constructor include/linux/mutex.h:253 [inline]
 #6: ffff88802b9f0160 (&rmidi->open_mutex){+.+.}-{4:4}, at: rawmidi_release_priv+0x48/0x170 sound/core/rawmidi.c:574
Modules linked in:
Preemption disabled at:
[<ffffffff81336576>] preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
Kernel panic - not syncing: scheduling while atomic: panic_on_warn set ...
CPU: 1 UID: 0 PID: 5757 Comm: kworker/1:6 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 vpanic+0x56d/0xa60 kernel/panic.c:651
 panic+0xc5/0xd0 kernel/panic.c:788
 check_panic_on_warn+0x89/0xb0 kernel/panic.c:525
 __schedule_bug+0xf1/0x150 kernel/sched/core.c:6076
 schedule_debug kernel/sched/core.c:6105 [inline]
 __schedule+0x18a7/0x5820 kernel/sched/core.c:7119
 __schedule_loop kernel/sched/core.c:7347 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7362
 schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
 drain_urb_queue+0x24e/0x410 sound/usb/midi2.c:246