=============================
WARNING: suspicious RCU usage
syzkaller #0 Not tainted
-----------------------------
kernel/sched/core.c:9226 Illegal context switch in RCU-sched read-side critical section!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 1
locks held by kworker/1:6/5420: 8, last CPU#1:
#0: ffff88810229b140 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x1466/0x1b10 kernel/workqueue.c:3371
#1: ffffc900064a7d18 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0xa2c/0x1b10 kernel/workqueue.c:3372
#2: ffff888108be61d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
#2: ffff888108be61d8 (&dev->mutex){....}-{4:4}, at: hub_event+0x1bb/0x4510 drivers/usb/core/hub.c:5917
#3: ffff88810972c1d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
#3: ffff88810972c1d8 (&dev->mutex){....}-{4:4}, at: usb_disconnect+0x10a/0x9a0 drivers/usb/core/hub.c:2346
#4: ffff88811b0921a0 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
#4: ffff88811b0921a0 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1171 [inline]
#4: ffff88811b0921a0 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb2/0x620 drivers/base/dd.c:1369
#5: ffffffff8ac6cea0 (register_mutex#3){+.+.}-{4:4}, at: class_mutex_constructor include/linux/mutex.h:253 [inline]
#5: ffffffff8ac6cea0 (register_mutex#3){+.+.}-{4:4}, at: __usb_audio_disconnect sound/usb/card.c:1130 [inline]
#5: ffffffff8ac6cea0 (register_mutex#3){+.+.}-{4:4}, at: usb_audio_disconnect+0x7b/0x310 sound/usb/card.c:1164
#6: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#6: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
#6: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid include/linux/mmzone.h:2276 [inline]
#6: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: __virt_addr_valid+0x161/0x430 arch/x86/mm/physaddr.c:54
#7: ffffc900001b8c98 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11d/0x5f0 kernel/time/timer.c:1745
stack backtrace:
CPU: 1 UID: 0 PID: 5420 Comm: kworker/1:6 Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Workqueue: usb_hub_wq hub_event
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
lockdep_rcu_suspicious.cold+0x4f/0xb2 kernel/locking/lockdep.c:6972
__might_resched+0x2d9/0x330 kernel/sched/core.c:9226
__cancel_work_sync kernel/workqueue.c:4561 [inline]
cancel_delayed_work_sync+0xb8/0xf0 kernel/workqueue.c:4642
mmc_free_host+0x19/0x40 drivers/mmc/core/host.c:700
vub300_delete drivers/mmc/host/vub300.c:379 [inline]
kref_put include/linux/kref.h:65 [inline]
vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline]
vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742
call_timer_fn+0x198/0x5f0 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers+0x757/0xb00 kernel/time/timer.c:2374
__run_timer_base kernel/time/timer.c:2386 [inline]
__run_timer_base kernel/time/timer.c:2378 [inline]
run_timer_base+0x114/0x190 kernel/time/timer.c:2395
run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405
handle_softirqs+0x1d9/0x9b0 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0x168/0x210 kernel/softirq.c:758
irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x5e/0x380 kernel/locking/lockdep.c:5947
Code: 05 8f ac 93 0b 83 f8 07 0f 87 da 00 00 00 48 0f a3 05 1e 0c 85 09 0f 82 c9 02 00 00 8b 35 be 19 85 09 85 f6 0f 85 c7 00 00 00 <48> 8b 44 24 30 65 48 2b 05 2d ac 93 0b 0f 85 09 03 00 00 48 83 c4
RSP: 0018:ffffc900064a7378 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000200
RDX: 0000000000000001 RSI: ffffffff892bda86 RDI: ffffffff87d2bd80
RBP: ffffffff898e6e60 R08: 00000000f76a16d3 R09: 000000000000001e
R10: 0000000000000200 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
pfn_valid include/linux/mmzone.h:2276 [inline]
__virt_addr_valid+0x17d/0x430 arch/x86/mm/physaddr.c:54
kasan_addr_to_slab+0xd/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xe/0xa0 mm/kasan/generic.c:541
__call_rcu_common.constprop.0+0xa5/0x9b0 kernel/rcu/tree.c:3181
kernfs_put.part.0+0x3a6/0xaa0 fs/kernfs/dir.c:618
kernfs_put+0x53/0x60 fs/kernfs/dir.c:630
sysfs_put include/linux/sysfs.h:808 [inline]
__kobject_del+0xea/0x220 lib/kobject.c:605
kobject_del lib/kobject.c:627 [inline]
kobject_del+0x3f/0x60 lib/kobject.c:619
device_del+0x630/0x9b0 drivers/base/core.c:3985
snd_card_disconnect.part.0+0x401/0x520 sound/core/init.c:550
snd_card_disconnect+0x1f/0x30 sound/core/init.c:499
__usb_audio_disconnect sound/usb/card.c:1140 [inline]
usb_audio_disconnect+0x25a/0x310 sound/usb/card.c:1164
usb_unbind_interface+0x1dd/0x9b0 drivers/usb/core/driver.c:460
device_remove drivers/base/dd.c:618 [inline]
device_remove+0x12a/0x180 drivers/base/dd.c:610
__device_release_driver drivers/base/dd.c:1349 [inline]
device_release_driver_internal+0x44e/0x620 drivers/base/dd.c:1372
bus_remove_device+0x2bc/0x560 drivers/base/bus.c:664
device_del+0x376/0x9b0 drivers/base/core.c:3965
usb_disable_device+0x367/0x810 drivers/usb/core/message.c:1484
usb_disconnect+0x2e2/0x9a0 drivers/usb/core/hub.c:2355
hub_port_connect drivers/usb/core/hub.c:5425 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5725 [inline]
port_event drivers/usb/core/hub.c:5889 [inline]
hub_event+0x1d46/0x4510 drivers/usb/core/hub.c:5971
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
process_scheduled_works kernel/workqueue.c:3479 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x69f/0xc90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
BUG: sleeping function called from invalid context at kernel/workqueue.c:4561
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5420, name: kworker/1:6
preempt_count: 101, expected: 0
RCU nest depth: 0, expected: 0
locks held by kworker/1:6/5420: 8, last CPU#1:
#0: ffff88810229b140 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x1466/0x1b10 kernel/workqueue.c:3371
#1: ffffc900064a7d18 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0xa2c/0x1b10 kernel/workqueue.c:3372
#2: ffff888108be61d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
#2: ffff888108be61d8 (&dev->mutex){....}-{4:4}, at: hub_event+0x1bb/0x4510 drivers/usb/core/hub.c:5917
#3: ffff88810972c1d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
#3: ffff88810972c1d8 (&dev->mutex){....}-{4:4}, at: usb_disconnect+0x10a/0x9a0 drivers/usb/core/hub.c:2346
#4: ffff88811b0921a0 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
#4: ffff88811b0921a0 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1171 [inline]
#4: ffff88811b0921a0 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb2/0x620 drivers/base/dd.c:1369
#5: ffffffff8ac6cea0 (register_mutex#3){+.+.}-{4:4}, at: class_mutex_constructor include/linux/mutex.h:253 [inline]
#5: ffffffff8ac6cea0 (register_mutex#3){+.+.}-{4:4}, at: __usb_audio_disconnect sound/usb/card.c:1130 [inline]
#5: ffffffff8ac6cea0 (register_mutex#3){+.+.}-{4:4}, at: usb_audio_disconnect+0x7b/0x310 sound/usb/card.c:1164
#6: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#6: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
#6: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid include/linux/mmzone.h:2276 [inline]
#6: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: __virt_addr_valid+0x161/0x430 arch/x86/mm/physaddr.c:54
#7: ffffc900001b8c98 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11d/0x5f0 kernel/time/timer.c:1745
Preemption disabled at:
[] rcu_read_lock_sched include/linux/rcupdate.h:944 [inline]
[] pfn_valid include/linux/mmzone.h:2276 [inline]
[] __virt_addr_valid+0x15a/0x430 arch/x86/mm/physaddr.c:54
CPU: 1 UID: 0 PID: 5420 Comm: kworker/1:6 Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Workqueue: usb_hub_wq hub_event
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
__might_resched.cold+0x1dc/0x222 kernel/sched/core.c:9264
__cancel_work_sync kernel/workqueue.c:4561 [inline]
cancel_delayed_work_sync+0xb8/0xf0 kernel/workqueue.c:4642
mmc_free_host+0x19/0x40 drivers/mmc/core/host.c:700
vub300_delete drivers/mmc/host/vub300.c:379 [inline]
kref_put include/linux/kref.h:65 [inline]
vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline]
vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742
call_timer_fn+0x198/0x5f0 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers+0x757/0xb00 kernel/time/timer.c:2374
__run_timer_base kernel/time/timer.c:2386 [inline]
__run_timer_base kernel/time/timer.c:2378 [inline]
run_timer_base+0x114/0x190 kernel/time/timer.c:2395
run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405
handle_softirqs+0x1d9/0x9b0 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0x168/0x210 kernel/softirq.c:758
irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x5e/0x380 kernel/locking/lockdep.c:5947
Code: 05 8f ac 93 0b 83 f8 07 0f 87 da 00 00 00 48 0f a3 05 1e 0c 85 09 0f 82 c9 02 00 00 8b 35 be 19 85 09 85 f6 0f 85 c7 00 00 00 <48> 8b 44 24 30 65 48 2b 05 2d ac 93 0b 0f 85 09 03 00 00 48 83 c4
RSP: 0018:ffffc900064a7378 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000200
RDX: 0000000000000001 RSI: ffffffff892bda86 RDI: ffffffff87d2bd80
RBP: ffffffff898e6e60 R08: 00000000f76a16d3 R09: 000000000000001e
R10: 0000000000000200 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
pfn_valid include/linux/mmzone.h:2276 [inline]
__virt_addr_valid+0x17d/0x430 arch/x86/mm/physaddr.c:54
kasan_addr_to_slab+0xd/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xe/0xa0 mm/kasan/generic.c:541
__call_rcu_common.constprop.0+0xa5/0x9b0 kernel/rcu/tree.c:3181
kernfs_put.part.0+0x3a6/0xaa0 fs/kernfs/dir.c:618
kernfs_put+0x53/0x60 fs/kernfs/dir.c:630
sysfs_put include/linux/sysfs.h:808 [inline]
__kobject_del+0xea/0x220 lib/kobject.c:605
kobject_del lib/kobject.c:627 [inline]
kobject_del+0x3f/0x60 lib/kobject.c:619
device_del+0x630/0x9b0 drivers/base/core.c:3985
snd_card_disconnect.part.0+0x401/0x520 sound/core/init.c:550
snd_card_disconnect+0x1f/0x30 sound/core/init.c:499
__usb_audio_disconnect sound/usb/card.c:1140 [inline]
usb_audio_disconnect+0x25a/0x310 sound/usb/card.c:1164
usb_unbind_interface+0x1dd/0x9b0 drivers/usb/core/driver.c:460
device_remove drivers/base/dd.c:618 [inline]
device_remove+0x12a/0x180 drivers/base/dd.c:610
__device_release_driver drivers/base/dd.c:1349 [inline]
device_release_driver_internal+0x44e/0x620 drivers/base/dd.c:1372
bus_remove_device+0x2bc/0x560 drivers/base/bus.c:664
device_del+0x376/0x9b0 drivers/base/core.c:3965
usb_disable_device+0x367/0x810 drivers/usb/core/message.c:1484
usb_disconnect+0x2e2/0x9a0 drivers/usb/core/hub.c:2355
hub_port_connect drivers/usb/core/hub.c:5425 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5725 [inline]
port_event drivers/usb/core/hub.c:5889 [inline]
hub_event+0x1d46/0x4510 drivers/usb/core/hub.c:5971
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
process_scheduled_works kernel/workqueue.c:3479 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x69f/0xc90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
=============================
WARNING: suspicious RCU usage
syzkaller #0 Tainted: G W
-----------------------------
kernel/rcu/srcutree.c:1464 Illegal synchronize_srcu() in same-type SRCU (or in RCU) read-side critical section!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 1
locks held by kworker/1:6/5420: 8, last CPU#1:
#0: ffff88810229b140 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x1466/0x1b10 kernel/workqueue.c:3371
#1: ffffc900064a7d18 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0xa2c/0x1b10 kernel/workqueue.c:3372
#2: ffff888108be61d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
#2: ffff888108be61d8 (&dev->mutex){....}-{4:4}, at: hub_event+0x1bb/0x4510 drivers/usb/core/hub.c:5917
#3: ffff88810972c1d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
#3: ffff88810972c1d8 (&dev->mutex){....}-{4:4}, at: usb_disconnect+0x10a/0x9a0 drivers/usb/core/hub.c:2346
#4: ffff88811b0921a0 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
#4: ffff88811b0921a0 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1171 [inline]
#4: ffff88811b0921a0 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb2/0x620 drivers/base/dd.c:1369
#5: ffffffff8ac6cea0 (register_mutex#3){+.+.}-{4:4}, at: class_mutex_constructor include/linux/mutex.h:253 [inline]
#5: ffffffff8ac6cea0 (register_mutex#3){+.+.}-{4:4}, at: __usb_audio_disconnect sound/usb/card.c:1130 [inline]
#5: ffffffff8ac6cea0 (register_mutex#3){+.+.}-{4:4}, at: usb_audio_disconnect+0x7b/0x310 sound/usb/card.c:1164
#6: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#6: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
#6: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid include/linux/mmzone.h:2276 [inline]
#6: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: __virt_addr_valid+0x161/0x430 arch/x86/mm/physaddr.c:54
#7: ffffc900001b8c98 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11d/0x5f0 kernel/time/timer.c:1745
stack backtrace:
CPU: 1 UID: 0 PID: 5420 Comm: kworker/1:6 Tainted: G W syzkaller #0 PREEMPT(lazy)
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Workqueue: usb_hub_wq hub_event
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
lockdep_rcu_suspicious.cold+0x4f/0xb2 kernel/locking/lockdep.c:6972
__synchronize_srcu+0x29d/0x300 kernel/rcu/srcutree.c:1464
wakeup_source_remove drivers/base/power/wakeup.c:201 [inline]
wakeup_source_unregister.part.0+0x12c/0x540 drivers/base/power/wakeup.c:237
wakeup_source_unregister+0x1f/0x30 drivers/base/power/wakeup.c:236
mmc_host_classdev_release+0x42/0x120 drivers/mmc/core/host.c:69
device_release+0xd2/0x270 drivers/base/core.c:2640
kobject_cleanup lib/kobject.c:689 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1f7/0x640 lib/kobject.c:737
put_device+0x1f/0x30 drivers/base/core.c:3884
vub300_delete drivers/mmc/host/vub300.c:379 [inline]
kref_put include/linux/kref.h:65 [inline]
vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline]
vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742
call_timer_fn+0x198/0x5f0 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers+0x757/0xb00 kernel/time/timer.c:2374
__run_timer_base kernel/time/timer.c:2386 [inline]
__run_timer_base kernel/time/timer.c:2378 [inline]
run_timer_base+0x114/0x190 kernel/time/timer.c:2395
run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405
handle_softirqs+0x1d9/0x9b0 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0x168/0x210 kernel/softirq.c:758
irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x5e/0x380 kernel/locking/lockdep.c:5947
Code: 05 8f ac 93 0b 83 f8 07 0f 87 da 00 00 00 48 0f a3 05 1e 0c 85 09 0f 82 c9 02 00 00 8b 35 be 19 85 09 85 f6 0f 85 c7 00 00 00 <48> 8b 44 24 30 65 48 2b 05 2d ac 93 0b 0f 85 09 03 00 00 48 83 c4
RSP: 0018:ffffc900064a7378 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000200
RDX: 0000000000000001 RSI: ffffffff892bda86 RDI: ffffffff87d2bd80
RBP: ffffffff898e6e60 R08: 00000000f76a16d3 R09: 000000000000001e
R10: 0000000000000200 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
pfn_valid include/linux/mmzone.h:2276 [inline]
__virt_addr_valid+0x17d/0x430 arch/x86/mm/physaddr.c:54
kasan_addr_to_slab+0xd/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xe/0xa0 mm/kasan/generic.c:541
__call_rcu_common.constprop.0+0xa5/0x9b0 kernel/rcu/tree.c:3181
kernfs_put.part.0+0x3a6/0xaa0 fs/kernfs/dir.c:618
kernfs_put+0x53/0x60 fs/kernfs/dir.c:630
sysfs_put include/linux/sysfs.h:808 [inline]
__kobject_del+0xea/0x220 lib/kobject.c:605
kobject_del lib/kobject.c:627 [inline]
kobject_del+0x3f/0x60 lib/kobject.c:619
device_del+0x630/0x9b0 drivers/base/core.c:3985
snd_card_disconnect.part.0+0x401/0x520 sound/core/init.c:550
snd_card_disconnect+0x1f/0x30 sound/core/init.c:499
__usb_audio_disconnect sound/usb/card.c:1140 [inline]
usb_audio_disconnect+0x25a/0x310 sound/usb/card.c:1164
usb_unbind_interface+0x1dd/0x9b0 drivers/usb/core/driver.c:460
device_remove drivers/base/dd.c:618 [inline]
device_remove+0x12a/0x180 drivers/base/dd.c:610
__device_release_driver drivers/base/dd.c:1349 [inline]
device_release_driver_internal+0x44e/0x620 drivers/base/dd.c:1372
bus_remove_device+0x2bc/0x560 drivers/base/bus.c:664
device_del+0x376/0x9b0 drivers/base/core.c:3965
usb_disable_device+0x367/0x810 drivers/usb/core/message.c:1484
usb_disconnect+0x2e2/0x9a0 drivers/usb/core/hub.c:2355
hub_port_connect drivers/usb/core/hub.c:5425 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5725 [inline]
port_event drivers/usb/core/hub.c:5889 [inline]
hub_event+0x1d46/0x4510 drivers/usb/core/hub.c:5971
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
process_scheduled_works kernel/workqueue.c:3479 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x69f/0xc90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
BUG: slee
BUG: sleeping function called from invalid context at kernel/rcu/srcutree.c:1472
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5420, name: kworker/1:6
preempt_count: 101, expected: 0
RCU nest depth: 0, expected: 0
locks held by kworker/1:6/5420: 8, last CPU#1:
#0: ffff88810229b140 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x1466/0x1b10 kernel/workqueue.c:3371
#1: ffffc900064a7d18 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0xa2c/0x1b10 kernel/workqueue.c:3372
#2: ffff888108be61d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
#2: ffff888108be61d8 (&dev->mutex){....}-{4:4}, at: hub_event+0x1bb/0x4510 drivers/usb/core/hub.c:5917
#3: ffff88810972c1d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
#3: ffff88810972c1d8 (&dev->mutex){....}-{4:4}, at: usb_disconnect+0x10a/0x9a0 drivers/usb/core/hub.c:2346
#4: ffff88811b0921a0 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
#4: ffff88811b0921a0 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1171 [inline]
#4: ffff88811b0921a0 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb2/0x620 drivers/base/dd.c:1369
#5: ffffffff8ac6cea0 (register_mutex#3){+.+.}-{4:4}, at: class_mutex_constructor include/linux/mutex.h:253 [inline]
#5: ffffffff8ac6cea0 (register_mutex#3){+.+.}-{4:4}, at: __usb_audio_disconnect sound/usb/card.c:1130 [inline]
#5: ffffffff8ac6cea0 (register_mutex#3){+.+.}-{4:4}, at: usb_audio_disconnect+0x7b/0x310 sound/usb/card.c:1164
#6: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#6: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
#6: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid include/linux/mmzone.h:2276 [inline]
#6: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: __virt_addr_valid+0x161/0x430 arch/x86/mm/physaddr.c:54
#7: ffffc900001b8c98 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11d/0x5f0 kernel/time/timer.c:1745
Preemption disabled at:
[] rcu_read_lock_sched include/linux/rcupdate.h:944 [inline]
[] pfn_valid include/linux/mmzone.h:2276 [inline]
[] __virt_addr_valid+0x15a/0x430 arch/x86/mm/physaddr.c:54
CPU: 1 UID: 0 PID: 5420 Comm: kworker/1:6 Tainted: G W syzkaller #0 PREEMPT(lazy)
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Workqueue: usb_hub_wq hub_event
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
__might_resched.cold+0x1dc/0x222 kernel/sched/core.c:9264
__synchronize_srcu+0x13c/0x300 kernel/rcu/srcutree.c:1472
wakeup_source_remove drivers/base/power/wakeup.c:201 [inline]
wakeup_source_unregister.part.0+0x12c/0x540 drivers/base/power/wakeup.c:237
wakeup_source_unregister+0x1f/0x30 drivers/base/power/wakeup.c:236
mmc_host_classdev_release+0x42/0x120 drivers/mmc/core/host.c:69
device_release+0xd2/0x270 drivers/base/core.c:2640
kobject_cleanup lib/kobject.c:689 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1f7/0x640 lib/kobject.c:737
put_device+0x1f/0x30 drivers/base/core.c:3884
vub300_delete drivers/mmc/host/vub300.c:379 [inline]
kref_put include/linux/kref.h:65 [inline]
vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline]
vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742
call_timer_fn+0x198/0x5f0 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers+0x757/0xb00 kernel/time/timer.c:2374
__run_timer_base kernel/time/timer.c:2386 [inline]
__run_timer_base kernel/time/timer.c:2378 [inline]
run_timer_base+0x114/0x190 kernel/time/timer.c:2395
run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405
handle_softirqs+0x1d9/0x9b0 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0x168/0x210 kernel/softirq.c:758
irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x5e/0x380 kernel/locking/lockdep.c:5947
Code: 05 8f ac 93 0b 83 f8 07 0f 87 da 00 00 00 48 0f a3 05 1e 0c 85 09 0f 82 c9 02 00 00 8b 35 be 19 85 09 85 f6 0f 85 c7 00 00 00 <48> 8b 44 24 30 65 48 2b 05 2d ac 93 0b 0f 85 09 03 00 00 48 83 c4
RSP: 0018:ffffc900064a7378 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000200
RDX: 0000000000000001 RSI: ffffffff892bda86 RDI: ffffffff87d2bd80
RBP: ffffffff898e6e60 R08: 00000000f76a16d3 R09: 000000000000001e
R10: 0000000000000200 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
pfn_valid include/linux/mmzone.h:2276 [inline]
__virt_addr_valid+0x17d/0x430 arch/x86/mm/physaddr.c:54
kasan_addr_to_slab+0xd/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xe/0xa0 mm/kasan/generic.c:541
__call_rcu_common.constprop.0+0xa5/0x9b0 kernel/rcu/tree.c:3181
kernfs_put.part.0+0x3a6/0xaa0 fs/kernfs/dir.c:618
kernfs_put+0x53/0x60 fs/kernfs/dir.c:630
sysfs_put include/linux/sysfs.h:808 [inline]
__kobject_del+0xea/0x220 lib/kobject.c:605
kobject_del lib/kobject.c:627 [inline]
kobject_del+0x3f/0x60 lib/kobject.c:619
device_del+0x630/0x9b0 drivers/base/core.c:3985
snd_card_disconnect.part.0+0x401/0x520 sound/core/init.c:550
snd_card_disconnect+0x1f/0x30 sound/core/init.c:499
__usb_audio_disconnect sound/usb/card.c:1140 [inline]
usb_audio_disconnect+0x25a/0x310 sound/usb/card.c:1164
usb_unbind_interface+0x1dd/0x9b0 drivers/usb/core/driver.c:460
device_remove drivers/base/dd.c:618 [inline]
device_remove+0x12a/0x180 drivers/base/dd.c:610
__device_release_driver drivers/base/dd.c:1349 [inline]
device_release_driver_internal+0x44e/0x620 drivers/base/dd.c:1372
bus_remove_device+0x2bc/0x560 drivers/base/bus.c:664
device_del+0x376/0x9b0 drivers/base/core.c:3965
usb_disable_device+0x367/0x810 drivers/usb/core/message.c:1484
usb_disconnect+0x2e2/0x9a0 drivers/usb/core/hub.c:2355
hub_port_connect drivers/usb/core/hub.c:5425 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5725 [inline]
port_event drivers/usb/core/hub.c:5889 [inline]
hub_event+0x1d46/0x4510 drivers/usb/core/hub.c:5971
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
process_scheduled_works kernel/workqueue.c:3479 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x69f/0xc90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
ODEBUG: object ffffc900001b8a60 is NOT on stack ffffc900064a0000, but annotated.
------------[ cut here ]------------
1
WARNING: lib/debugobjects.c:672 at debug_object_is_on_stack lib/debugobjects.c:672 [inline], CPU#1: kworker/1:6/5420
WARNING: lib/debugobjects.c:672 at lookup_object_or_alloc.part.0.cold+0x19/0x40 lib/debugobjects.c:705, CPU#1: kworker/1:6/5420
Modules linked in:
CPU: 1 UID: 0 PID: 5420 Comm: kworker/1:6 Tainted: G W syzkaller #0 PREEMPT(lazy)
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:debug_object_is_on_stack lib/debugobjects.c:672 [inline]
RIP: 0010:lookup_object_or_alloc.part.0.cold+0x19/0x40 lib/debugobjects.c:705
Code: c4 60 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 83 c5 01 89 2d 60 6b 0f 13 4c 89 e6 48 c7 c7 c0 c8 d2 87 e8 21 c2 fa ff 90 <0f> 0b 90 e9 b2 d0 bb 01 83 c5 01 89 2d 3f 6b 0f 13 49 39 c4 73 da
RSP: 0018:ffffc900001b88f0 EFLAGS: 00010082
RAX: 0000000000000050 RBX: ffff88810872f658 RCX: 0000000000000000
RDX: 0000000000000050 RSI: ffffffff8193a6e9 RDI: fffff5200003710f
RBP: 0000000000000001 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000102 R11: 0000000000000001 R12: ffffc900001b8a60
R13: ffff888122100000 R14: 0000000000000001 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8882684d7000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f205b386d58 CR3: 0000000117542000 CR4: 00000000003506f0
Call Trace:
lookup_object_or_alloc lib/debugobjects.c:682 [inline]
__debug_object_init+0x2a9/0x3d0 lib/debugobjects.c:798
__synchronize_srcu+0x1c3/0x300 kernel/rcu/srcutree.c:1475
wakeup_source_remove drivers/base/power/wakeup.c:201 [inline]
wakeup_source_unregister.part.0+0x12c/0x540 drivers/base/power/wakeup.c:237
wakeup_source_unregister+0x1f/0x30 drivers/base/power/wakeup.c:236
mmc_host_classdev_release+0x42/0x120 drivers/mmc/core/host.c:69
device_release+0xd2/0x270 drivers/base/core.c:2640
kobject_cleanup lib/kobject.c:689 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1f7/0x640 lib/kobject.c:737
put_device+0x1f/0x30 drivers/base/core.c:3884
vub300_delete drivers/mmc/host/vub300.c:379 [inline]
kref_put include/linux/kref.h:65 [inline]
vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline]
vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742
call_timer_fn+0x198/0x5f0 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers+0x757/0xb00 kernel/time/timer.c:2374
__run_timer_base kernel/time/timer.c:2386 [inline]
__run_timer_base kernel/time/timer.c:2378 [inline]
run_timer_base+0x114/0x190 kernel/time/timer.c:2395
run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405
handle_softirqs+0x1d9/0x9b0 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0x168/0x210 kernel/softirq.c:758
irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x5e/0x380 kernel/locking/lockdep.c:5947
Code: 05 8f ac 93 0b 83 f8 07 0f 87 da 00 00 00 48 0f a3 05 1e 0c 85 09 0f 82 c9 02 00 00 8b 35 be 19 85 09 85 f6 0f 85 c7 00 00 00 <48> 8b 44 24 30 65 48 2b 05 2d ac 93 0b 0f 85 09 03 00 00 48 83 c4
RSP: 0018:ffffc900064a7378 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000200
RDX: 0000000000000001 RSI: ffffffff892bda86 RDI: ffffffff87d2bd80
RBP: ffffffff898e6e60 R08: 00000000f76a16d3 R09: 000000000000001e
R10: 0000000000000200 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
pfn_valid include/linux/mmzone.h:2276 [inline]
__virt_addr_valid+0x17d/0x430 arch/x86/mm/physaddr.c:54
kasan_addr_to_slab+0xd/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xe/0xa0 mm/kasan/generic.c:541
__call_rcu_common.constprop.0+0xa5/0x9b0 kernel/rcu/tree.c:3181
kernfs_put.part.0+0x3a6/0xaa0 fs/kernfs/dir.c:618
kernfs_put+0x53/0x60 fs/kernfs/dir.c:630
sysfs_put include/linux/sysfs.h:808 [inline]
__kobject_del+0xea/0x220 lib/kobject.c:605
kobject_del lib/kobject.c:627 [inline]
kobject_del+0x3f/0x60 lib/kobject.c:619
device_del+0x630/0x9b0 drivers/base/core.c:3985
snd_card_disconnect.part.0+0x401/0x520 sound/core/init.c:550
snd_card_disconnect+0x1f/0x30 sound/core/init.c:499
__usb_audio_disconnect sound/usb/card.c:1140 [inline]
usb_audio_disconnect+0x25a/0x310 sound/usb/card.c:1164
usb_unbind_interface+0x1dd/0x9b0 drivers/usb/core/driver.c:460
device_remove drivers/base/dd.c:618 [inline]
device_remove+0x12a/0x180 drivers/base/dd.c:610
__device_release_driver drivers/base/dd.c:1349 [inline]
device_release_driver_internal+0x44e/0x620 drivers/base/dd.c:1372
bus_remove_device+0x2bc/0x560 drivers/base/bus.c:664
device_del+0x376/0x9b0 drivers/base/core.c:3965
usb_disable_device+0x367/0x810 drivers/usb/core/message.c:1484
usb_disconnect+0x2e2/0x9a0 drivers/usb/core/hub.c:2355
hub_port_connect drivers/usb/core/hub.c:5425 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5725 [inline]
port_event drivers/usb/core/hub.c:5889 [inline]
hub_event+0x1d46/0x4510 drivers/usb/core/hub.c:5971
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
process_scheduled_works kernel/workqueue.c:3479 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x69f/0xc90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
----------------
Code disassembly (best guess):
0: 05 8f ac 93 0b add $0xb93ac8f,%eax
5: 83 f8 07 cmp $0x7,%eax
8: 0f 87 da 00 00 00 ja 0xe8
e: 48 0f a3 05 1e 0c 85 bt %rax,0x9850c1e(%rip) # 0x9850c34
15: 09
16: 0f 82 c9 02 00 00 jb 0x2e5
1c: 8b 35 be 19 85 09 mov 0x98519be(%rip),%esi # 0x98519e0
22: 85 f6 test %esi,%esi
24: 0f 85 c7 00 00 00 jne 0xf1
* 2a: 48 8b 44 24 30 mov 0x30(%rsp),%rax <-- trapping instruction
2f: 65 48 2b 05 2d ac 93 sub %gs:0xb93ac2d(%rip),%rax # 0xb93ac64
36: 0b
37: 0f 85 09 03 00 00 jne 0x346
3d: 48 rex.W
3e: 83 .byte 0x83
3f: c4 .byte 0xc4