scsi host1: usb-storage 1-1:1.0 cdc_eem 1-1:1.1 usb1: register 'cdc_eem' at usb-dummy_hcd.0-1, CDC EEM Device, 5a:36:3c:24:57:39 cdc_acm 1-1:1.2: ttyACM0: USB ACM device BUG: sche BUG: scheduling while atomic: kworker/1:3/5351/0x00010001 locks held by kworker/1:3/5351: 7, on CPU#1: #0: ffff88801f692140 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #0: ffff88801f692140 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffff88801f692140 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3361 [inline] #0: ffff88801f692140 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3479 #1: ffffc90003627c40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #1: ffffc90003627c40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #1: ffffc90003627c40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3361 [inline] #1: ffffc90003627c40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3479 #2: ffff888029e371d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline] #2: ffff888029e371d8 (&dev->mutex){....}-{4:4}, at: hub_event+0x184/0x4d30 drivers/usb/core/hub.c:5912 #3: ffff88802b77b1d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline] #3: ffff88802b77b1d8 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x450 drivers/base/dd.c:1073 #4: ffff88807f8451a0 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline] #4: ffff88807f8451a0 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x450 drivers/base/dd.c:1073 #5: ffffffff901b58a0 (register_mutex#6){+.+.}-{4:4}, at: class_mutex_constructor include/linux/mutex.h:253 [inline] #5: ffffffff901b58a0 (register_mutex#6){+.+.}-{4:4}, at: usb_audio_probe+0x5e6/0x2240 sound/usb/card.c:985 #6: ffff88807b4a6160 (&rmidi->open_mutex){+.+.}-{4:4}, at: class_mutex_constructor include/linux/mutex.h:253 [inline] #6: ffff88807b4a6160 (&rmidi->open_mutex){+.+.}-{4:4}, at: rawmidi_release_priv+0x48/0x170 sound/core/rawmidi.c:574 Modules linked in: Preemption disabled at: [] __mutex_lock_common kernel/locking/mutex.c:645 [inline] [] __mutex_lock+0x171/0x1550 kernel/locking/mutex.c:821 Kernel panic - not syncing: scheduling while atomic: panic_on_warn set ... CPU: 1 UID: 0 PID: 5351 Comm: kworker/1:3 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: usb_hub_wq hub_event Call Trace: 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:6077 schedule_debug kernel/sched/core.c:6106 [inline] __schedule+0x1c2c/0x5bc0 kernel/sched/core.c:7120 __schedule_loop kernel/sched/core.c:7349 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7364 schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99 drain_urb_queue+0x24e/0x410 sound/usb/midi2.c:246 snd_rawmidi_drain_output+0x56f/0x8d0 sound/core/rawmidi.c:282 close_substream+0x20d/0x790 sound/core/rawmidi.c:551 rawmidi_release_priv+0xeb/0x170 sound/core/rawmidi.c:580 snd_rawmidi_kernel_release+0x46/0xa0 sound/core/rawmidi.c:596 ump_request_close sound/core/ump.c:623 [inline] snd_ump_parse_endpoint+0x85c/0xc40 sound/core/ump.c:1135 parse_ump_endpoints sound/usb/midi2.c:810 [inline] snd_usb_midi_v2_create+0x2545/0x4ac0 sound/usb/midi2.c:1158 snd_usb_create_stream+0x262/0x630 sound/usb/card.c:290 snd_usb_create_streams sound/usb/card.c:392 [inline] usb_audio_probe+0x144c/0x2240 sound/usb/card.c:1065 usb_probe_interface+0x788/0xe50 drivers/usb/core/driver.c:399 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x254/0xae0 drivers/base/dd.c:706 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500 __device_attach+0x2c4/0x450 drivers/base/dd.c:1098 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x12a/0x220 drivers/base/bus.c:620 device_add+0x7d7/0xb80 drivers/base/core.c:3776 usb_set_configuration+0x1ad8/0x2180 drivers/usb/core/message.c:2268 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250 usb_probe_device+0x1c3/0x3b0 drivers/usb/core/driver.c:293 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x254/0xae0 drivers/base/dd.c:706 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500 __device_attach+0x2c4/0x450 drivers/base/dd.c:1098 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x12a/0x220 drivers/base/bus.c:620 device_add+0x7d7/0xb80 drivers/base/core.c:3776 usb_new_device+0x9aa/0x1690 drivers/usb/core/hub.c:2708 hub_port_connect drivers/usb/core/hub.c:5580 [inline] hub_port_connect_change drivers/usb/core/hub.c:5720 [inline] port_event drivers/usb/core/hub.c:5884 [inline] hub_event+0x28e8/0x4d30 drivers/usb/core/hub.c:5966 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560 kthread+0x38b/0x480 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 Kernel Offset: disabled Rebooting in 86400 seconds..