40][ T4229]  hci_rx_work+0x255/0xa10
[  106.890854][ T4229]  process_one_work+0x863/0x1000
[  106.895793][ T4229]  ? worker_detach_from_pool+0x240/0x240
[  106.901411][ T4229]  ? lockdep_hardirqs_off+0x70/0x100
[  106.906693][ T4229]  ? _raw_spin_lock_irq+0xab/0xe0
[  106.911714][ T4229]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  106.917074][ T4229]  ? wq_worker_running+0x97/0x170
[  106.922095][ T4229]  worker_thread+0xaa8/0x12a0
[  106.926799][ T4229]  kthread+0x436/0x520
[  106.930863][ T4229]  ? rcu_lock_release+0x20/0x20
[  106.935726][ T4229]  ? kthread_blkcg+0xd0/0xd0
[  106.940308][ T4229]  ret_from_fork+0x1f/0x30
[  106.944744][ T4229]  </TASK>
[  106.947751][ T4296] CPU: 1 PID: 4296 Comm: kworker/u5:5 Not tainted syzkaller #0
[  106.955298][ T4296] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  106.965351][ T4296] Workqueue: hci4 hci_rx_work
[  106.970044][ T4296] Call Trace:
[  106.973327][ T4296]  <TASK>
[  106.976260][ T4296]  dump_stack_lvl+0x168/0x230
[  106.980948][ T4296]  ? show_regs_print_info+0x20/0x20
[  106.986174][ T4296]  ? load_image+0x3b0/0x3b0
[  106.990696][ T4296]  sysfs_create_dir_ns+0x252/0x280
[  106.993686][ T4229] kobject_add_internal failed for hci3:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  106.995805][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  107.013975][ T4296]  ? sysfs_warn_dup+0xa0/0xa0
[  107.017686][ T4229] Bluetooth: hci3: failed to register connection device
[  107.018654][ T4296]  ? le_conn_complete_evt+0xcbc/0x1590
[  107.031010][ T4296]  ? hci_event_packet+0xe05/0x12f0
[  107.036130][ T4296]  ? process_one_work+0x863/0x1000
[  107.041252][ T4296]  ? do_raw_spin_unlock+0x11d/0x230
[  107.046473][ T4296]  kobject_add_internal+0x662/0xd00
[  107.051683][ T4296]  kobject_add+0x152/0x210
[  107.056113][ T4296]  ? kobject_init+0x1d0/0x1d0
[  107.060808][ T4296]  ? klist_children_get+0x50/0x50
[  107.065834][ T4296]  ? get_device_parent+0x121/0x3f0
[  107.070952][ T4296]  device_add+0x483/0xfb0
[  107.075298][ T4296]  hci_conn_add_sysfs+0xd1/0x1e0
[  107.080263][ T4296]  le_conn_complete_evt+0xcbc/0x1590
[  107.085585][ T4296]  ? cs_le_create_conn+0x5e0/0x5e0
[  107.090706][ T4296]  ? __mutex_trylock_common+0x14f/0x250
[  107.096262][ T4296]  hci_le_meta_evt+0x289/0x3b80
[  107.101129][ T4296]  ? hci_event_packet+0x36d/0x12f0
[  107.106243][ T4296]  ? hci_event_packet+0x2e2/0x12f0
[  107.111359][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  107.116413][ T4296]  ? hci_remote_host_features_evt+0x280/0x280
[  107.122478][ T4296]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  107.128132][ T4296]  ? mark_lock+0x94/0x320
[  107.132477][ T4296]  ? mutex_unlock+0x10/0x10
[  107.136077][  T146] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:201'
[  107.136995][ T4296]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  107.137022][ T4296]  ? lock_chain_count+0x20/0x20
[  107.151114][ T4372] Bluetooth: hci1: command 0x0406 tx timeout
[  107.152408][ T4296]  ? __rwlock_init+0x140/0x140
[  107.152433][ T4296]  hci_event_packet+0xe05/0x12f0
[  107.172856][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  107.178058][ T4296]  ? rcu_lock_release+0x20/0x20
[  107.182914][ T4296]  ? hci_send_to_monitor+0x9c/0x4a0
[  107.188102][ T4296]  hci_rx_work+0x255/0xa10
[  107.192517][ T4296]  process_one_work+0x863/0x1000
[  107.197456][ T4296]  ? worker_detach_from_pool+0x240/0x240
[  107.202506][ T4229] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:201'
[  107.203075][ T4296]  ? lockdep_hardirqs_off+0x70/0x100
[  107.203102][ T4296]  ? _raw_spin_lock_irq+0xab/0xe0
[  107.222786][ T4296]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  107.228157][ T4296]  ? wq_worker_running+0x97/0x170
[  107.233181][ T4296]  worker_thread+0xaa8/0x12a0
[  107.237848][ T4296]  ? _raw_spin_unlock_irqrestore+0x82/0x100
[  107.243746][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  107.248947][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  107.254142][ T4296]  ? _raw_spin_unlock_irqrestore+0xaa/0x100
[  107.260036][ T4296]  kthread+0x436/0x520
[  107.264096][ T4296]  ? rcu_lock_release+0x20/0x20
[  107.268937][ T4296]  ? kthread_blkcg+0xd0/0xd0
[  107.273523][ T4296]  ret_from_fork+0x1f/0x30
[  107.277944][ T4296]  </TASK>
[  107.280952][  T146] CPU: 0 PID: 146 Comm: kworker/u5:0 Not tainted syzkaller #0
[  107.288406][  T146] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  107.293884][ T4797] Bluetooth: hci4: command 0x0406 tx timeout
[  107.298456][  T146] Workqueue: hci1 hci_rx_work
[  107.309073][  T146] Call Trace:
[  107.312358][  T146]  <TASK>
[  107.314922][ T4296] kobject_add_internal failed for hci4:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  107.315283][  T146]  dump_stack_lvl+0x168/0x230
[  107.315311][  T146]  ? show_regs_print_info+0x20/0x20
[  107.328621][ T4296] Bluetooth: hci4: failed to register connection device
[  107.333114][  T146]  ? load_image+0x3b0/0x3b0
[  107.333153][  T146]  sysfs_create_dir_ns+0x252/0x280
[  107.354810][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  107.359839][  T146]  ? sysfs_warn_dup+0xa0/0xa0
[  107.363197][ T4797] Bluetooth: hci0: command 0x0406 tx timeout
[  107.364515][  T146]  ? le_conn_complete_evt+0xcbc/0x1590
[  107.375905][  T146]  ? hci_event_packet+0xe05/0x12f0
[  107.381016][  T146]  ? process_one_work+0x863/0x1000
[  107.386135][  T146]  ? do_raw_spin_unlock+0x11d/0x230
[  107.391338][  T146]  kobject_add_internal+0x662/0xd00
[  107.396543][  T146]  kobject_add+0x152/0x210
[  107.400969][  T146]  ? kobject_init+0x1d0/0x1d0
[  107.405653][  T146]  ? klist_children_get+0x50/0x50
[  107.410679][  T146]  ? get_device_parent+0x121/0x3f0
[  107.415796][  T146]  device_add+0x483/0xfb0
[  107.420141][  T146]  hci_conn_add_sysfs+0xd1/0x1e0
[  107.425086][  T146]  le_conn_complete_evt+0xcbc/0x1590
[  107.430384][  T146]  ? cs_le_create_conn+0x5e0/0x5e0
[  107.435498][  T146]  ? __mutex_trylock_common+0x14f/0x250
[  107.441049][  T146]  hci_le_meta_evt+0x289/0x3b80
[  107.445893][  T146]  ? hci_event_packet+0x36d/0x12f0
[  107.450995][  T146]  ? hci_event_packet+0x2e2/0x12f0
[  107.456095][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  107.461130][  T146]  ? hci_remote_host_features_evt+0x280/0x280
[  107.467188][  T146]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  107.472807][  T146]  ? mark_lock+0x94/0x320
[  107.477145][  T146]  ? mutex_unlock+0x10/0x10
[  107.481655][  T146]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  107.487646][  T146]  ? lock_chain_count+0x20/0x20
[  107.492507][  T146]  ? __rwlock_init+0x140/0x140
[  107.497278][  T146]  hci_event_packet+0xe05/0x12f0
[  107.502216][  T146]  ? lockdep_hardirqs_on+0x94/0x140
[  107.507422][  T146]  ? rcu_lock_release+0x20/0x20
[  107.512279][  T146]  ? hci_send_to_monitor+0x9c/0x4a0
[  107.517474][  T146]  hci_rx_work+0x255/0xa10
[  107.521888][  T146]  process_one_work+0x863/0x1000
[  107.526822][  T146]  ? worker_detach_from_pool+0x240/0x240
[  107.532465][  T146]  ? lockdep_hardirqs_off+0x70/0x100
[  107.537748][  T146]  ? _raw_spin_lock_irq+0xab/0xe0
[  107.542760][  T146]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  107.548130][  T146]  ? wq_worker_running+0x97/0x170
[  107.553160][  T146]  worker_thread+0xaa8/0x12a0
[  107.557863][  T146]  kthread+0x436/0x520
[  107.561925][  T146]  ? rcu_lock_release+0x20/0x20
[  107.566761][  T146]  ? kthread_blkcg+0xd0/0xd0
[  107.571340][  T146]  ret_from_fork+0x1f/0x30
[  107.575803][  T146]  </TASK>
[  107.579090][ T4229] CPU: 1 PID: 4229 Comm: kworker/u5:1 Not tainted syzkaller #0
[  107.586642][ T4229] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  107.590683][  T146] kobject_add_internal failed for hci1:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  107.596708][ T4229] Workqueue: hci3 hci_rx_work
[  107.596731][ T4229] Call Trace:
[  107.596739][ T4229]  <TASK>
[  107.596747][ T4229]  dump_stack_lvl+0x168/0x230
[  107.596772][ T4229]  ? show_regs_print_info+0x20/0x20
[  107.610585][  T146] Bluetooth: hci1: failed to register connection device
[  107.614574][ T4229]  ? load_image+0x3b0/0x3b0
[  107.614609][ T4229]  sysfs_create_dir_ns+0x252/0x280
[  107.647066][ T4229]  ? __lock_acquire+0x7c60/0x7c60
[  107.652074][ T4229]  ? sysfs_warn_dup+0xa0/0xa0
[  107.656744][ T4229]  ? le_conn_complete_evt+0xcbc/0x1590
[  107.662185][ T4229]  ? hci_event_packet+0xe05/0x12f0
[  107.667283][ T4229]  ? process_one_work+0x863/0x1000
[  107.672381][ T4229]  ? do_raw_spin_unlock+0x11d/0x230
[  107.677579][ T4229]  kobject_add_internal+0x662/0xd00
[  107.682761][ T4229]  kobject_add+0x152/0x210
[  107.687173][ T4229]  ? kobject_init+0x1d0/0x1d0
[  107.691842][ T4229]  ? klist_children_get+0x50/0x50
[  107.696847][ T4229]  ? get_device_parent+0x121/0x3f0
[  107.701941][ T4229]  device_add+0x483/0xfb0
[  107.706267][ T4229]  hci_conn_add_sysfs+0xd1/0x1e0
[  107.711200][ T4229]  le_conn_complete_evt+0xcbc/0x1590
[  107.716469][ T4229]  ? cs_le_create_conn+0x5e0/0x5e0
[  107.720317][ T4372] Bluetooth: hci3: command 0x0406 tx timeout
[  107.721576][ T4229]  ? __mutex_trylock_common+0x14f/0x250
[  107.733081][ T4229]  hci_le_meta_evt+0x289/0x3b80
[  107.737929][ T4229]  ? hci_event_packet+0x36d/0x12f0
[  107.743023][ T4229]  ? hci_event_packet+0x2e2/0x12f0
[  107.748148][ T4229]  ? __lock_acquire+0x7c60/0x7c60
[  107.753162][ T4229]  ? hci_remote_host_features_evt+0x280/0x280
[  107.759210][ T4229]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  107.764821][ T4229]  ? mark_lock+0x94/0x320
[  107.769130][ T4229]  ? mutex_unlock+0x10/0x10
[  107.773618][ T4229]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  107.779595][ T4229]  ? lock_chain_count+0x20/0x20
[  107.784427][ T4229]  ? __rwlock_init+0x140/0x140
[  107.789185][ T4229]  hci_event_packet+0xe05/0x12f0
[  107.794102][ T4229]  ? lockdep_hardirqs_on+0x94/0x140
[  107.799281][ T4229]  ? rcu_lock_release+0x20/0x20
[  107.804111][ T4229]  ? hci_send_to_monitor+0x9c/0x4a0
[  107.809312][ T4229]  hci_rx_work+0x255/0xa10
[  107.813729][ T4229]  process_one_work+0x863/0x1000
[  107.818651][ T4229]  ? worker_detach_from_pool+0x240/0x240
[  107.824262][ T4229]  ? lockdep_hardirqs_off+0x70/0x100
[  107.829558][ T4229]  ? _raw_spin_lock_irq+0xab/0xe0
[  107.834562][ T4229]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  107.839923][ T4229]  ? wq_worker_running+0x97/0x170
[  107.844925][ T4229]  worker_thread+0xaa8/0x12a0
[  107.849591][ T4229]  kthread+0x436/0x520
[  107.853636][ T4229]  ? rcu_lock_release+0x20/0x20
[  107.858460][ T4229]  ? kthread_blkcg+0xd0/0xd0
[  107.863033][ T4229]  ret_from_fork+0x1f/0x30
[  107.867432][ T4229]  </TASK>
[  107.874342][ T4229] kobject_add_internal failed for hci3:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  107.900203][ T4229] Bluetooth: hci3: failed to register connection device
[  108.000334][ T1324] Bluetooth: hci2: command 0x0406 tx timeout
[  108.007321][ T4229] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:201'
[  108.016814][ T4229] CPU: 0 PID: 4229 Comm: kworker/u5:1 Not tainted syzkaller #0
[  108.024360][ T4229] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  108.034412][ T4229] Workqueue: hci4 hci_rx_work
[  108.039103][ T4229] Call Trace:
[  108.042381][ T4229]  <TASK>
[  108.045311][ T4229]  dump_stack_lvl+0x168/0x230
[  108.049997][ T4229]  ? show_regs_print_info+0x20/0x20
[  108.055199][ T4229]  ? load_image+0x3b0/0x3b0
[  108.059720][ T4229]  sysfs_create_dir_ns+0x252/0x280
[  108.064845][ T4229]  ? __lock_acquire+0x7c60/0x7c60
[  108.069888][ T4229]  ? sysfs_warn_dup+0xa0/0xa0
[  108.074573][ T4229]  ? le_conn_complete_evt+0xcbc/0x1590
[  108.080035][ T4229]  ? hci_event_packet+0xe05/0x12f0
[  108.085152][ T4229]  ? process_one_work+0x863/0x1000
[  108.090266][ T4229]  ? do_raw_spin_unlock+0x11d/0x230
[  108.095468][ T4229]  kobject_add_internal+0x662/0xd00
[  108.100677][ T4229]  kobject_add+0x152/0x210
[  108.105101][ T4229]  ? kobject_init+0x1d0/0x1d0
[  108.109782][ T4229]  ? klist_children_get+0x50/0x50
[  108.114817][ T4229]  ? get_device_parent+0x121/0x3f0
[  108.119937][ T4229]  device_add+0x483/0xfb0
[  108.124281][ T4229]  hci_conn_add_sysfs+0xd1/0x1e0
[  108.129225][ T4229]  le_conn_complete_evt+0xcbc/0x1590
[  108.134526][ T4229]  ? cs_le_create_conn+0x5e0/0x5e0
[  108.139648][ T4229]  ? __mutex_trylock_common+0x14f/0x250
[  108.145204][ T4229]  hci_le_meta_evt+0x289/0x3b80
[  108.150068][ T4229]  ? hci_event_packet+0x36d/0x12f0
[  108.155184][ T4229]  ? hci_event_packet+0x2e2/0x12f0
[  108.160305][ T4229]  ? __lock_acquire+0x7c60/0x7c60
[  108.165341][ T4229]  ? hci_remote_host_features_evt+0x280/0x280
[  108.171406][ T4229]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  108.177043][ T4229]  ? mark_lock+0x94/0x320
[  108.181375][ T4229]  ? mutex_unlock+0x10/0x10
[  108.185902][ T4229]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  108.191892][ T4229]  ? lock_chain_count+0x20/0x20
[  108.196743][ T4229]  ? __rwlock_init+0x140/0x140
[  108.201519][ T4229]  hci_event_packet+0xe05/0x12f0
[  108.206461][ T4229]  ? lockdep_hardirqs_on+0x94/0x140
[  108.211679][ T4229]  ? rcu_lock_release+0x20/0x20
[  108.216546][ T4229]  ? hci_send_to_monitor+0x9c/0x4a0
[  108.221750][ T4229]  hci_rx_work+0x255/0xa10
[  108.226189][ T4229]  process_one_work+0x863/0x1000
[  108.231142][ T4229]  ? worker_detach_from_pool+0x240/0x240
[  108.236775][ T4229]  ? lockdep_hardirqs_off+0x70/0x100
[  108.242067][ T4229]  ? _raw_spin_lock_irq+0xab/0xe0
[  108.247091][ T4229]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  108.252465][ T4229]  ? wq_worker_running+0x97/0x170
[  108.257491][ T4229]  worker_thread+0xaa8/0x12a0
[  108.262198][ T4229]  kthread+0x436/0x520
[  108.266270][ T4229]  ? rcu_lock_release+0x20/0x20
[  108.271120][ T4229]  ? kthread_blkcg+0xd0/0xd0
[  108.275712][ T4229]  ret_from_fork+0x1f/0x30
[  108.280139][ T4229]  </TASK>
[  108.289469][ T4230] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:201'
[  108.308598][ T4230] CPU: 1 PID: 4230 Comm: kworker/u5:2 Not tainted syzkaller #0
[  108.316156][ T4230] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  108.326209][ T4230] Workqueue: hci1 hci_rx_work
[  108.330905][ T4230] Call Trace:
[  108.334183][ T4230]  <TASK>
[  108.337106][ T4230]  dump_stack_lvl+0x168/0x230
[  108.341788][ T4230]  ? show_regs_print_info+0x20/0x20
[  108.346981][ T4230]  ? load_image+0x3b0/0x3b0
[  108.351479][ T4230]  sysfs_create_dir_ns+0x252/0x280
[  108.356592][ T4230]  ? __lock_acquire+0x7c60/0x7c60
[  108.361630][ T4230]  ? sysfs_warn_dup+0xa0/0xa0
[  108.365617][ T4229] kobject_add_internal failed for hci4:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  108.366302][ T4230]  ? le_conn_complete_evt+0xcbc/0x1590
[  108.379522][ T4229] Bluetooth: hci4: failed to register connection device
[  108.384895][ T4230]  ? hci_event_packet+0xe05/0x12f0
[  108.384917][ T4230]  ? process_one_work+0x863/0x1000
[  108.384937][ T4230]  ? do_raw_spin_unlock+0x11d/0x230
[  108.393121][ T4229] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:201'
[  108.396939][ T4230]  kobject_add_internal+0x662/0xd00
[  108.421807][ T4230]  kobject_add+0x152/0x210
[  108.426227][ T4230]  ? kobject_init+0x1d0/0x1d0
[  108.430898][ T4230]  ? klist_children_get+0x50/0x50
[  108.435908][ T4230]  ? get_device_parent+0x121/0x3f0
[  108.441011][ T4230]  device_add+0x483/0xfb0
[  108.445339][ T4230]  hci_conn_add_sysfs+0xd1/0x1e0
[  108.450268][ T4230]  le_conn_complete_evt+0xcbc/0x1590
[  108.455565][ T4230]  ? cs_le_create_conn+0x5e0/0x5e0
[  108.460672][ T4230]  ? __mutex_trylock_common+0x14f/0x250
[  108.466213][ T4230]  hci_le_meta_evt+0x289/0x3b80
[  108.471051][ T4230]  ? hci_event_packet+0x36d/0x12f0
[  108.476165][ T4230]  ? hci_event_packet+0x2e2/0x12f0
[  108.481273][ T4230]  ? __lock_acquire+0x7c60/0x7c60
[  108.486294][ T4230]  ? hci_remote_host_features_evt+0x280/0x280
[  108.492346][ T4230]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  108.497969][ T4230]  ? mark_lock+0x94/0x320
[  108.502293][ T4230]  ? mutex_unlock+0x10/0x10
[  108.506793][ T4230]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  108.512770][ T4230]  ? lock_chain_count+0x20/0x20
[  108.517612][ T4230]  ? __rwlock_init+0x140/0x140
[  108.522367][ T4230]  hci_event_packet+0xe05/0x12f0
[  108.527299][ T4230]  ? lockdep_hardirqs_on+0x94/0x140
[  108.532494][ T4230]  ? rcu_lock_release+0x20/0x20
[  108.537340][ T4230]  ? hci_send_to_monitor+0x9c/0x4a0
[  108.542530][ T4230]  hci_rx_work+0x255/0xa10
[  108.546946][ T4230]  process_one_work+0x863/0x1000
[  108.551888][ T4230]  ? worker_detach_from_pool+0x240/0x240
[  108.557507][ T4230]  ? lockdep_hardirqs_off+0x70/0x100
[  108.562785][ T4230]  ? _raw_spin_lock_irq+0xab/0xe0
[  108.567796][ T4230]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  108.573158][ T4230]  ? wq_worker_running+0x97/0x170
[  108.578173][ T4230]  worker_thread+0xaa8/0x12a0
[  108.582837][ T4230]  ? _raw_spin_unlock_irqrestore+0x82/0x100
[  108.588718][ T4230]  ? lockdep_hardirqs_on+0x94/0x140
[  108.593910][ T4230]  ? lockdep_hardirqs_on+0x94/0x140
[  108.599102][ T4230]  ? _raw_spin_unlock_irqrestore+0xaa/0x100
[  108.604992][ T4230]  kthread+0x436/0x520
[  108.609051][ T4230]  ? rcu_lock_release+0x20/0x20
[  108.613892][ T4230]  ? kthread_blkcg+0xd0/0xd0
[  108.618473][ T4230]  ret_from_fork+0x1f/0x30
[  108.622890][ T4230]  </TASK>
[  108.625897][ T4229] CPU: 0 PID: 4229 Comm: kworker/u5:1 Not tainted syzkaller #0
[  108.633442][ T4229] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  108.643496][ T4229] Workqueue: hci4 hci_rx_work
[  108.648181][ T4229] Call Trace:
[  108.651459][ T4229]  <TASK>
[  108.654393][ T4229]  dump_stack_lvl+0x168/0x230
[  108.659082][ T4229]  ? show_regs_print_info+0x20/0x20
[  108.659440][ T4230] kobject_add_internal failed for hci1:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  108.664280][ T4229]  ? load_image+0x3b0/0x3b0
[  108.664313][ T4229]  sysfs_create_dir_ns+0x252/0x280
[  108.664335][ T4229]  ? __lock_acquire+0x7c60/0x7c60
[  108.677591][ T4230] Bluetooth: hci1: failed to register connection device
[  108.681969][ T4229]  ? sysfs_warn_dup+0xa0/0xa0
[  108.681991][ T4229]  ? le_conn_complete_evt+0xcbc/0x1590
[  108.688296][ T4230] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:201'
[  108.692076][ T4229]  ? hci_event_packet+0xe05/0x12f0
[  108.692100][ T4229]  ? process_one_work+0x863/0x1000
[  108.692120][ T4229]  ? do_raw_spin_unlock+0x11d/0x230
[  108.733878][ T4229]  kobject_add_internal+0x662/0xd00
[  108.739073][ T4229]  kobject_add+0x152/0x210
[  108.743483][ T4229]  ? kobject_init+0x1d0/0x1d0
[  108.748147][ T4229]  ? klist_children_get+0x50/0x50
[  108.753157][ T4229]  ? get_device_parent+0x121/0x3f0
[  108.758259][ T4229]  device_add+0x483/0xfb0
[  108.762582][ T4229]  hci_conn_add_sysfs+0xd1/0x1e0
[  108.767511][ T4229]  le_conn_complete_evt+0xcbc/0x1590
[  108.772791][ T4229]  ? cs_le_create_conn+0x5e0/0x5e0
[  108.777896][ T4229]  ? __mutex_trylock_common+0x14f/0x250
[  108.783431][ T4229]  hci_le_meta_evt+0x289/0x3b80
[  108.788270][ T4229]  ? hci_event_packet+0x36d/0x12f0
[  108.793369][ T4229]  ? hci_event_packet+0x2e2/0x12f0
[  108.798467][ T4229]  ? __lock_acquire+0x7c60/0x7c60
[  108.803477][ T4229]  ? lock_chain_count+0x20/0x20
[  108.808322][ T4229]  ? hci_remote_host_features_evt+0x280/0x280
[  108.814375][ T4229]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  108.820001][ T4229]  ? mark_lock+0x94/0x320
[  108.824316][ T4229]  ? mutex_unlock+0x10/0x10
[  108.828807][ T4229]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  108.834785][ T4229]  ? lock_chain_count+0x20/0x20
[  108.839628][ T4229]  ? __rwlock_init+0x140/0x140
[  108.844378][ T4229]  hci_event_packet+0xe05/0x12f0
[  108.849304][ T4229]  ? lockdep_hardirqs_on+0x94/0x140
[  108.854493][ T4229]  ? rcu_lock_release+0x20/0x20
[  108.859334][ T4229]  ? hci_send_to_monitor+0x9c/0x4a0
[  108.864518][ T4229]  ? hci_rx_work+0x63e/0xa10
[  108.869096][ T4229]  hci_rx_work+0x255/0xa10
[  108.873510][ T4229]  process_one_work+0x863/0x1000
[  108.878454][ T4229]  ? worker_detach_from_pool+0x240/0x240
[  108.884073][ T4229]  ? lockdep_hardirqs_off+0x70/0x100
[  108.889349][ T4229]  ? _raw_spin_lock_irq+0xab/0xe0
[  108.894357][ T4229]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  108.899717][ T4229]  ? wq_worker_running+0x97/0x170
[  108.904729][ T4229]  worker_thread+0xaa8/0x12a0
[  108.909416][ T4229]  kthread+0x436/0x520
[  108.913469][ T4229]  ? rcu_lock_release+0x20/0x20
[  108.918304][ T4229]  ? kthread_blkcg+0xd0/0xd0
[  108.922881][ T4229]  ret_from_fork+0x1f/0x30
[  108.927297][ T4229]  </TASK>
[  108.930306][ T4230] CPU: 1 PID: 4230 Comm: kworker/u5:2 Not tainted syzkaller #0
[  108.937847][ T4230] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  108.947897][ T4230] Workqueue: hci3 hci_rx_work
[  108.952577][ T4230] Call Trace:
[  108.955848][ T4230]  <TASK>
[  108.958771][ T4230]  dump_stack_lvl+0x168/0x230
[  108.960142][ T4229] kobject_add_internal failed for hci4:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  108.963446][ T4230]  ? show_regs_print_info+0x20/0x20
[  108.963468][ T4230]  ? load_image+0x3b0/0x3b0
[  108.976712][ T4229] Bluetooth: hci4: failed to register connection device
[  108.981807][ T4230]  sysfs_create_dir_ns+0x252/0x280
[  108.981830][ T4230]  ? __lock_acquire+0x7c60/0x7c60
[  108.981851][ T4230]  ? sysfs_warn_dup+0xa0/0xa0
[  108.981867][ T4230]  ? le_conn_complete_evt+0xcbc/0x1590
[  108.981887][ T4230]  ? hci_event_packet+0xe05/0x12f0
[  108.988182][ T4229] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:201'
[  108.993266][ T4230]  ? process_one_work+0x863/0x1000
[  108.993291][ T4230]  ? do_raw_spin_unlock+0x11d/0x230
[  109.038214][ T4230]  kobject_add_internal+0x662/0xd00
[  109.043423][ T4230]  kobject_add+0x152/0x210
[  109.047832][ T4230]  ? kobject_init+0x1d0/0x1d0
[  109.052501][ T4230]  ? klist_children_get+0x50/0x50
[  109.057513][ T4230]  ? get_device_parent+0x121/0x3f0
[  109.062619][ T4230]  device_add+0x483/0xfb0
[  109.066946][ T4230]  hci_conn_add_sysfs+0xd1/0x1e0
[  109.071874][ T4230]  le_conn_complete_evt+0xcbc/0x1590
[  109.077155][ T4230]  ? cs_le_create_conn+0x5e0/0x5e0
[  109.082260][ T4230]  ? __mutex_trylock_common+0x14f/0x250
[  109.087801][ T4230]  hci_le_meta_evt+0x289/0x3b80
[  109.092644][ T4230]  ? hci_event_packet+0x36d/0x12f0
[  109.097745][ T4230]  ? hci_event_packet+0x2e2/0x12f0
[  109.102872][ T4230]  ? __lock_acquire+0x7c60/0x7c60
[  109.107905][ T4230]  ? hci_remote_host_features_evt+0x280/0x280
[  109.113973][ T4230]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  109.119598][ T4230]  ? mark_lock+0x94/0x320
[  109.123919][ T4230]  ? mutex_unlock+0x10/0x10
[  109.128424][ T4230]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  109.134394][ T4230]  ? lock_chain_count+0x20/0x20
[  109.139231][ T4230]  ? __rwlock_init+0x140/0x140
[  109.143993][ T4230]  hci_event_packet+0xe05/0x12f0
[  109.148922][ T4230]  ? lockdep_hardirqs_on+0x94/0x140
[  109.154118][ T4230]  ? rcu_lock_release+0x20/0x20
[  109.159011][ T4230]  ? hci_send_to_monitor+0x9c/0x4a0
[  109.164212][ T4230]  hci_rx_work+0x255/0xa10
[  109.168660][ T4230]  process_one_work+0x863/0x1000
[  109.173600][ T4230]  ? worker_detach_from_pool+0x240/0x240
[  109.179219][ T4230]  ? lockdep_hardirqs_off+0x70/0x100
[  109.184502][ T4230]  ? _raw_spin_lock_irq+0xab/0xe0
[  109.189514][ T4230]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  109.194876][ T4230]  ? wq_worker_running+0x97/0x170
[  109.199891][ T4230]  worker_thread+0xaa8/0x12a0
[  109.204555][ T4230]  ? _raw_spin_unlock_irqrestore+0x82/0x100
[  109.210456][ T4230]  ? lockdep_hardirqs_on+0x94/0x140
[  109.215646][ T4230]  ? lockdep_hardirqs_on+0x94/0x140
[  109.220833][ T4230]  ? _raw_spin_unlock_irqrestore+0xaa/0x100
[  109.226734][ T4230]  kthread+0x436/0x520
[  109.230794][ T4230]  ? rcu_lock_release+0x20/0x20
[  109.235637][ T4230]  ? kthread_blkcg+0xd0/0xd0
[  109.240216][ T4230]  ret_from_fork+0x1f/0x30
[  109.244632][ T4230]  </TASK>
[  109.247636][ T4229] CPU: 0 PID: 4229 Comm: kworker/u5:1 Not tainted syzkaller #0
[  109.255185][ T4229] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  109.265263][ T4229] Workqueue: hci4 hci_rx_work
[  109.269947][ T4229] Call Trace:
[  109.273226][ T4229]  <TASK>
[  109.276155][ T4229]  dump_stack_lvl+0x168/0x230
[  109.280597][ T4230] kobject_add_internal failed for hci3:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  109.280842][ T4229]  ? show_regs_print_info+0x20/0x20
[  109.294099][ T4230] Bluetooth: hci3: failed to register connection device
[  109.299187][ T4229]  ? load_image+0x3b0/0x3b0
[  109.310603][ T4229]  sysfs_create_dir_ns+0x252/0x280
[  109.315723][ T4229]  ? __lock_acquire+0x7c60/0x7c60
[  109.320754][ T4229]  ? sysfs_warn_dup+0xa0/0xa0
[  109.325437][ T4229]  ? le_conn_complete_evt+0xcbc/0x1590
[  109.330898][ T4229]  ? hci_event_packet+0xe05/0x12f0
[  109.336021][ T4229]  ? process_one_work+0x863/0x1000
[  109.341133][ T4229]  ? do_raw_spin_unlock+0x11d/0x230
[  109.343492][ T4296] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:201'
[  109.346337][ T4229]  kobject_add_internal+0x662/0xd00
[  109.360961][ T4229]  kobject_add+0x152/0x210
[  109.365371][ T4229]  ? kobject_init+0x1d0/0x1d0
[  109.370042][ T4229]  ? klist_children_get+0x50/0x50
[  109.375051][ T4229]  ? get_device_parent+0x121/0x3f0
[  109.380162][ T4229]  device_add+0x483/0xfb0
[  109.384494][ T4229]  hci_conn_add_sysfs+0xd1/0x1e0
[  109.389422][ T4229]  le_conn_complete_evt+0xcbc/0x1590
[  109.394710][ T4229]  ? cs_le_create_conn+0x5e0/0x5e0
[  109.399831][ T4229]  ? __mutex_trylock_common+0x14f/0x250
[  109.405384][ T4229]  hci_le_meta_evt+0x289/0x3b80
[  109.410238][ T4229]  ? hci_event_packet+0x36d/0x12f0
[  109.415349][ T4229]  ? hci_event_packet+0x2e2/0x12f0
[  109.420465][ T4229]  ? __lock_acquire+0x7c60/0x7c60
[  109.425490][ T4229]  ? lock_chain_count+0x20/0x20
[  109.430341][ T4229]  ? hci_remote_host_features_evt+0x280/0x280
[  109.436398][ T4229]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  109.442022][ T4229]  ? mark_lock+0x94/0x320
[  109.443317][ T4230] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:201'
[  109.446350][ T4229]  ? mutex_unlock+0x10/0x10
[  109.446375][ T4229]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  109.446399][ T4229]  ? lock_chain_count+0x20/0x20
[  109.471078][ T4229]  ? __rwlock_init+0x140/0x140
[  109.475842][ T4229]  hci_event_packet+0xe05/0x12f0
[  109.480774][ T4229]  ? lockdep_hardirqs_on+0x94/0x140
[  109.485977][ T4229]  ? rcu_lock_release+0x20/0x20
[  109.490824][ T4229]  ? hci_send_to_monitor+0x9c/0x4a0
[  109.496010][ T4229]  ? hci_rx_work+0x63e/0xa10
[  109.500604][ T4229]  hci_rx_work+0x255/0xa10
[  109.505023][ T4229]  process_one_work+0x863/0x1000
[  109.509961][ T4229]  ? worker_detach_from_pool+0x240/0x240
[  109.515579][ T4229]  ? lockdep_hardirqs_off+0x70/0x100
[  109.520856][ T4229]  ? _raw_spin_lock_irq+0xab/0xe0
[  109.525868][ T4229]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  109.531231][ T4229]  ? wq_worker_running+0x97/0x170
[  109.536249][ T4229]  worker_thread+0xaa8/0x12a0
[  109.540944][ T4229]  kthread+0x436/0x520
[  109.544998][ T4229]  ? rcu_lock_release+0x20/0x20
[  109.549857][ T4229]  ? kthread_blkcg+0xd0/0xd0
[  109.554439][ T4229]  ret_from_fork+0x1f/0x30
[  109.558860][ T4229]  </TASK>
[  109.561876][ T4296] CPU: 1 PID: 4296 Comm: kworker/u5:5 Not tainted syzkaller #0
[  109.569435][ T4296] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  109.579490][ T4296] Workqueue: hci3 hci_rx_work
[  109.584181][ T4296] Call Trace:
[  109.587454][ T4296]  <TASK>
[  109.589279][ T4229] kobject_add_internal failed for hci4:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  109.590377][ T4296]  dump_stack_lvl+0x168/0x230
[  109.590405][ T4296]  ? show_regs_print_info+0x20/0x20
[  109.603976][ T4229] Bluetooth: hci4: failed to register connection device
[  109.608219][ T4296]  ? load_image+0x3b0/0x3b0
[  109.608254][ T4296]  sysfs_create_dir_ns+0x252/0x280
[  109.614966][    T7] Bluetooth: hci1: command 0x0406 tx timeout
[  109.620319][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  109.620345][ T4296]  ? sysfs_warn_dup+0xa0/0xa0
[  109.625925][ T4229] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:201'
[  109.629913][ T4296]  ? le_conn_complete_evt+0xcbc/0x1590
[  109.629936][ T4296]  ? hci_event_packet+0xe05/0x12f0
[  109.629954][ T4296]  ? process_one_work+0x863/0x1000
[  109.629974][ T4296]  ? do_raw_spin_unlock+0x11d/0x230
[  109.630002][ T4296]  kobject_add_internal+0x662/0xd00
[  109.630029][ T4296]  kobject_add+0x152/0x210
[  109.630052][ T4296]  ? kobject_init+0x1d0/0x1d0
[  109.630076][ T4296]  ? klist_children_get+0x50/0x50
[  109.630093][ T4296]  ? get_device_parent+0x121/0x3f0
[  109.630116][ T4296]  device_add+0x483/0xfb0
[  109.630145][ T4296]  hci_conn_add_sysfs+0xd1/0x1e0
[  109.709458][ T4296]  le_conn_complete_evt+0xcbc/0x1590
[  109.714750][ T4296]  ? cs_le_create_conn+0x5e0/0x5e0
[  109.719866][ T4296]  ? __mutex_trylock_common+0x14f/0x250
[  109.725403][ T4296]  hci_le_meta_evt+0x289/0x3b80
[  109.730252][ T4296]  ? hci_event_packet+0x36d/0x12f0
[  109.735368][ T4296]  ? hci_event_packet+0x2e2/0x12f0
[  109.740469][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  109.745487][ T4296]  ? hci_remote_host_features_evt+0x280/0x280
[  109.751541][ T4296]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  109.757164][ T4296]  ? mark_lock+0x94/0x320
[  109.761481][ T4296]  ? mutex_unlock+0x10/0x10
[  109.765972][ T4296]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  109.771944][ T4296]  ? lock_chain_count+0x20/0x20
[  109.776784][ T4296]  ? __rwlock_init+0x140/0x140
[  109.781537][ T4296]  hci_event_packet+0xe05/0x12f0
[  109.786462][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  109.791691][ T4296]  ? rcu_lock_release+0x20/0x20
[  109.796533][ T4296]  ? hci_send_to_monitor+0x9c/0x4a0
[  109.801721][ T4296]  hci_rx_work+0x255/0xa10
[  109.806150][ T4296]  process_one_work+0x863/0x1000
[  109.811087][ T4296]  ? worker_detach_from_pool+0x240/0x240
[  109.816707][ T4296]  ? lockdep_hardirqs_off+0x70/0x100
[  109.821984][ T4296]  ? _raw_spin_lock_irq+0xab/0xe0
[  109.826996][ T4296]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  109.832356][ T4296]  ? wq_worker_running+0x97/0x170
[  109.837371][ T4296]  worker_thread+0xaa8/0x12a0
[  109.842035][ T4296]  ? _raw_spin_unlock_irqrestore+0x82/0x100
[  109.847922][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  109.853114][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  109.858299][ T4296]  ? _raw_spin_unlock_irqrestore+0xaa/0x100
[  109.864185][ T4296]  kthread+0x436/0x520
[  109.868240][ T4296]  ? rcu_lock_release+0x20/0x20
[  109.873080][ T4296]  ? kthread_blkcg+0xd0/0xd0
[  109.877675][ T4296]  ret_from_fork+0x1f/0x30
[  109.882097][ T4296]  </TASK>
[  109.885102][ T4230] CPU: 0 PID: 4230 Comm: kworker/u5:2 Not tainted syzkaller #0
[  109.890564][ T4290] Bluetooth: hci0: command 0x0406 tx timeout
[  109.892687][ T4230] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  109.892702][ T4230] Workqueue: hci1 hci_rx_work
[  109.898760][ T4290] Bluetooth: hci4: command 0x0406 tx timeout
[  109.908703][ T4230] Call Trace:
[  109.908711][ T4230]  <TASK>
[  109.908720][ T4230]  dump_stack_lvl+0x168/0x230
[  109.908751][ T4230]  ? show_regs_print_info+0x20/0x20
[  109.908771][ T4230]  ? load_image+0x3b0/0x3b0
[  109.915048][ T4296] kobject_add_internal failed for hci3:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  109.919413][ T4230]  sysfs_create_dir_ns+0x252/0x280
[  109.922813][ T4296] Bluetooth: hci3: failed to register connection device
[  109.925622][ T4230]  ? __lock_acquire+0x7c60/0x7c60
[  109.925647][ T4230]  ? sysfs_warn_dup+0xa0/0xa0
[  109.925665][ T4230]  ? le_conn_complete_evt+0xcbc/0x1590
[  109.980232][ T4230]  ? hci_event_packet+0xe05/0x12f0
[  109.985349][ T4230]  ? process_one_work+0x863/0x1000
[  109.990473][ T4230]  ? do_raw_spin_unlock+0x11d/0x230
[  109.995677][ T4230]  kobject_add_internal+0x662/0xd00
[  110.000893][ T4230]  kobject_add+0x152/0x210
[  110.005319][ T4230]  ? kobject_init+0x1d0/0x1d0
[  110.009983][ T4230]  ? klist_children_get+0x50/0x50
[  110.014990][ T4230]  ? get_device_parent+0x121/0x3f0
[  110.020084][ T4230]  device_add+0x483/0xfb0
[  110.024429][ T4230]  hci_conn_add_sysfs+0xd1/0x1e0
[  110.029350][ T4230]  le_conn_complete_evt+0xcbc/0x1590
[  110.034637][ T4230]  ? cs_le_create_conn+0x5e0/0x5e0
[  110.039744][ T4230]  ? __mutex_trylock_common+0x14f/0x250
[  110.045306][ T4230]  hci_le_meta_evt+0x289/0x3b80
[  110.050148][ T4230]  ? hci_event_packet+0x36d/0x12f0
[  110.055263][ T4230]  ? hci_event_packet+0x2e2/0x12f0
[  110.060389][ T4230]  ? __lock_acquire+0x7c60/0x7c60
[  110.065405][ T4230]  ? hci_remote_host_features_evt+0x280/0x280
[  110.071454][ T4230]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  110.077071][ T4230]  ? mark_lock+0x94/0x320
[  110.081382][ T4230]  ? mutex_unlock+0x10/0x10
[  110.085867][ T4230]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  110.091831][ T4230]  ? lock_chain_count+0x20/0x20
[  110.096666][ T4230]  ? __rwlock_init+0x140/0x140
[  110.101412][ T4230]  hci_event_packet+0xe05/0x12f0
[  110.106341][ T4230]  ? lockdep_hardirqs_on+0x94/0x140
[  110.111524][ T4230]  ? rcu_lock_release+0x20/0x20
[  110.116360][ T4230]  ? hci_send_to_monitor+0x9c/0x4a0
[  110.121539][ T4230]  hci_rx_work+0x255/0xa10
[  110.125947][ T4230]  process_one_work+0x863/0x1000
[  110.130876][ T4230]  ? worker_detach_from_pool+0x240/0x240
[  110.136488][ T4230]  ? lockdep_hardirqs_off+0x70/0x100
[  110.141756][ T4230]  ? _raw_spin_lock_irq+0xab/0xe0
[  110.146769][ T4230]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  110.152134][ T4230]  ? wq_worker_running+0x97/0x170
[  110.157138][ T4230]  worker_thread+0xaa8/0x12a0
[  110.161821][ T4230]  ? _raw_spin_unlock_irqrestore+0x82/0x100
[  110.167719][ T4230]  ? lockdep_hardirqs_on+0x94/0x140
[  110.172911][ T4230]  ? lockdep_hardirqs_on+0x94/0x140
[  110.178090][ T4230]  ? _raw_spin_unlock_irqrestore+0xaa/0x100
[  110.183969][ T4230]  kthread+0x436/0x520
[  110.188018][ T4230]  ? rcu_lock_release+0x20/0x20
[  110.192848][ T4230]  ? kthread_blkcg+0xd0/0xd0
[  110.197419][ T4230]  ret_from_fork+0x1f/0x30
[  110.201832][ T4230]  </TASK>
[  110.219041][ T4229] CPU: 1 PID: 4229 Comm: kworker/u5:1 Not tainted syzkaller #0
[  110.226601][ T4229] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  110.236691][ T4229] Workqueue: hci4 hci_rx_work
[  110.241372][ T4229] Call Trace:
[  110.244645][ T4229]  <TASK>
[  110.245734][ T4230] kobject_add_internal failed for hci1:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  110.247566][ T4229]  dump_stack_lvl+0x168/0x230
[  110.247594][ T4229]  ? show_regs_print_info+0x20/0x20
[  110.260853][ T4230] Bluetooth: hci1: failed to register connection device
[  110.265413][ T4229]  ? load_image+0x3b0/0x3b0
[  110.281985][ T4229]  sysfs_create_dir_ns+0x252/0x280
[  110.287112][ T4229]  ? __lock_acquire+0x7c60/0x7c60
[  110.292143][ T4229]  ? sysfs_warn_dup+0xa0/0xa0
[  110.296824][ T4229]  ? le_conn_complete_evt+0xcbc/0x1590
[  110.302011][    T7] Bluetooth: hci3: command 0x0406 tx timeout
[  110.302278][ T4229]  ? hci_event_packet+0xe05/0x12f0
[  110.313317][ T4229]  ? process_one_work+0x863/0x1000
[  110.318433][ T4229]  ? do_raw_spin_unlock+0x11d/0x230
[  110.323638][ T4229]  kobject_add_internal+0x662/0xd00
[  110.328856][ T4229]  kobject_add+0x152/0x210
[  110.333279][ T4229]  ? kobject_init+0x1d0/0x1d0
[  110.337967][ T4229]  ? klist_children_get+0x50/0x50
[  110.342991][ T4229]  ? get_device_parent+0x121/0x3f0
[  110.348114][ T4229]  device_add+0x483/0xfb0
[  110.352458][ T4229]  hci_conn_add_sysfs+0xd1/0x1e0
[  110.357402][ T4229]  le_conn_complete_evt+0xcbc/0x1590
[  110.362704][ T4229]  ? cs_le_create_conn+0x5e0/0x5e0
[  110.367827][ T4229]  ? __mutex_trylock_common+0x14f/0x250
[  110.373382][ T4229]  hci_le_meta_evt+0x289/0x3b80
[  110.378240][ T4229]  ? hci_event_packet+0x36d/0x12f0
[  110.383357][ T4229]  ? hci_event_packet+0x2e2/0x12f0
[  110.388473][ T4229]  ? __lock_acquire+0x7c60/0x7c60
[  110.393516][ T4229]  ? lock_chain_count+0x20/0x20
[  110.398378][ T4229]  ? hci_remote_host_features_evt+0x280/0x280
[  110.404452][ T4229]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  110.410089][ T4229]  ? mark_lock+0x94/0x320
[  110.414429][ T4229]  ? mutex_unlock+0x10/0x10
[  110.418948][ T4229]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  110.424937][ T4229]  ? lock_chain_count+0x20/0x20
[  110.429792][ T4229]  ? __rwlock_init+0x140/0x140
[  110.431926][    T7] Bluetooth: hci2: command 0x0406 tx timeout
[  110.434556][ T4229]  hci_event_packet+0xe05/0x12f0
[  110.445424][ T4229]  ? lockdep_hardirqs_on+0x94/0x140
[  110.450630][ T4229]  ? rcu_lock_release+0x20/0x20
[  110.451330][ T4230] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:201'
[  110.455487][ T4229]  ? hci_send_to_monitor+0x9c/0x4a0
[  110.455508][ T4229]  ? hci_rx_work+0x63e/0xa10
[  110.474673][ T4229]  hci_rx_work+0x255/0xa10
[  110.479097][ T4229]  process_one_work+0x863/0x1000
[  110.484040][ T4229]  ? worker_detach_from_pool+0x240/0x240
[  110.489660][ T4229]  ? lockdep_hardirqs_off+0x70/0x100
[  110.494940][ T4229]  ? _raw_spin_lock_irq+0xab/0xe0
[  110.499951][ T4229]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  110.502680][ T4296] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:201'
[  110.505318][ T4229]  ? wq_worker_running+0x97/0x170
[  110.505343][ T4229]  worker_thread+0xaa8/0x12a0
[  110.505385][ T4229]  kthread+0x436/0x520
[  110.528480][ T4229]  ? rcu_lock_release+0x20/0x20
[  110.533330][ T4229]  ? kthread_blkcg+0xd0/0xd0
[  110.537910][ T4229]  ret_from_fork+0x1f/0x30
[  110.542332][ T4229]  </TASK>
[  110.545337][ T4296] CPU: 0 PID: 4296 Comm: kworker/u5:5 Not tainted syzkaller #0
[  110.552875][ T4296] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  110.562943][ T4296] Workqueue: hci1 hci_rx_work
[  110.567625][ T4296] Call Trace:
[  110.570905][ T4296]  <TASK>
[  110.572082][ T4229] kobject_add_internal failed for hci4:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  110.573827][ T4296]  dump_stack_lvl+0x168/0x230
[  110.573855][ T4296]  ? show_regs_print_info+0x20/0x20
[  110.592442][ T4229] Bluetooth: hci4: failed to register connection device
[  110.596846][ T4296]  ? load_image+0x3b0/0x3b0
[  110.608246][ T4296]  sysfs_create_dir_ns+0x252/0x280
[  110.608343][ T4229] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:201'
[  110.613357][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  110.613381][ T4296]  ? sysfs_warn_dup+0xa0/0xa0
[  110.613398][ T4296]  ? le_conn_complete_evt+0xcbc/0x1590
[  110.613417][ T4296]  ? hci_event_packet+0xe05/0x12f0
[  110.613437][ T4296]  ? process_one_work+0x863/0x1000
[  110.613457][ T4296]  ? do_raw_spin_unlock+0x11d/0x230
[  110.653322][ T4296]  kobject_add_internal+0x662/0xd00
[  110.658519][ T4296]  kobject_add+0x152/0x210
[  110.662930][ T4296]  ? kobject_init+0x1d0/0x1d0
[  110.667599][ T4296]  ? klist_children_get+0x50/0x50
[  110.672608][ T4296]  ? get_device_parent+0x121/0x3f0
[  110.677712][ T4296]  device_add+0x483/0xfb0
[  110.682038][ T4296]  hci_conn_add_sysfs+0xd1/0x1e0
[  110.686967][ T4296]  le_conn_complete_evt+0xcbc/0x1590
[  110.692263][ T4296]  ? cs_le_create_conn+0x5e0/0x5e0
[  110.697365][ T4296]  ? __mutex_trylock_common+0x14f/0x250
[  110.702904][ T4296]  hci_le_meta_evt+0x289/0x3b80
[  110.707749][ T4296]  ? hci_event_packet+0x36d/0x12f0
[  110.712848][ T4296]  ? hci_event_packet+0x2e2/0x12f0
[  110.717947][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  110.722965][ T4296]  ? hci_remote_host_features_evt+0x280/0x280
[  110.729027][ T4296]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  110.734650][ T4296]  ? mark_lock+0x94/0x320
[  110.738964][ T4296]  ? mutex_unlock+0x10/0x10
[  110.743470][ T4296]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  110.749442][ T4296]  ? lock_chain_count+0x20/0x20
[  110.754279][ T4296]  ? __rwlock_init+0x140/0x140
[  110.759033][ T4296]  hci_event_packet+0xe05/0x12f0
[  110.763957][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  110.769149][ T4296]  ? rcu_lock_release+0x20/0x20
[  110.773990][ T4296]  ? hci_send_to_monitor+0x9c/0x4a0
[  110.779176][ T4296]  hci_rx_work+0x255/0xa10
[  110.783588][ T4296]  process_one_work+0x863/0x1000
[  110.788528][ T4296]  ? worker_detach_from_pool+0x240/0x240
[  110.794144][ T4296]  ? lockdep_hardirqs_off+0x70/0x100
[  110.799416][ T4296]  ? _raw_spin_lock_irq+0xab/0xe0
[  110.804432][ T4296]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  110.809793][ T4296]  ? wq_worker_running+0x97/0x170
[  110.814816][ T4296]  worker_thread+0xaa8/0x12a0
[  110.819479][ T4296]  ? _raw_spin_unlock_irqrestore+0x82/0x100
[  110.825373][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  110.830565][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  110.835751][ T4296]  ? _raw_spin_unlock_irqrestore+0xaa/0x100
[  110.841643][ T4296]  kthread+0x436/0x520
[  110.845697][ T4296]  ? rcu_lock_release+0x20/0x20
[  110.850530][ T4296]  ? kthread_blkcg+0xd0/0xd0
[  110.855125][ T4296]  ret_from_fork+0x1f/0x30
[  110.859545][ T4296]  </TASK>
[  110.862553][ T4230] CPU: 1 PID: 4230 Comm: kworker/u5:2 Not tainted syzkaller #0
[  110.869214][ T4296] kobject_add_internal failed for hci1:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  110.870110][ T4230] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  110.870124][ T4230] Workqueue: hci3 hci_rx_work
[  110.870146][ T4230] Call Trace:
[  110.870153][ T4230]  <TASK>
[  110.870161][ T4230]  dump_stack_lvl+0x168/0x230
[  110.883641][ T4296] Bluetooth: hci1: failed to register connection device
[  110.893359][ T4230]  ? show_regs_print_info+0x20/0x20
[  110.893384][ T4230]  ? load_image+0x3b0/0x3b0
[  110.893416][ T4230]  sysfs_create_dir_ns+0x252/0x280
[  110.930617][ T4230]  ? __lock_acquire+0x7c60/0x7c60
[  110.935648][ T4230]  ? sysfs_warn_dup+0xa0/0xa0
[  110.940326][ T4230]  ? le_conn_complete_evt+0xcbc/0x1590
[  110.945780][ T4230]  ? hci_event_packet+0xe05/0x12f0
[  110.950889][ T4230]  ? process_one_work+0x863/0x1000
[  110.956005][ T4230]  ? do_raw_spin_unlock+0x11d/0x230
[  110.961198][ T4230]  kobject_add_internal+0x662/0xd00
[  110.966401][ T4230]  kobject_add+0x152/0x210
[  110.970819][ T4230]  ? kobject_init+0x1d0/0x1d0
[  110.975498][ T4230]  ? klist_children_get+0x50/0x50
[  110.980515][ T4230]  ? get_device_parent+0x121/0x3f0
[  110.985618][ T4230]  device_add+0x483/0xfb0
[  110.989946][ T4230]  hci_conn_add_sysfs+0xd1/0x1e0
[  110.994882][ T4230]  le_conn_complete_evt+0xcbc/0x1590
[  111.000166][ T4230]  ? cs_le_create_conn+0x5e0/0x5e0
[  111.005281][ T4230]  ? __mutex_trylock_common+0x14f/0x250
[  111.010828][ T4230]  hci_le_meta_evt+0x289/0x3b80
[  111.015689][ T4230]  ? hci_event_packet+0x36d/0x12f0
[  111.020797][ T4230]  ? hci_event_packet+0x2e2/0x12f0
[  111.025902][ T4230]  ? __lock_acquire+0x7c60/0x7c60
[  111.030926][ T4230]  ? hci_remote_host_features_evt+0x280/0x280
[  111.036983][ T4230]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  111.042610][ T4230]  ? mark_lock+0x94/0x320
[  111.046929][ T4230]  ? mutex_unlock+0x10/0x10
[  111.051426][ T4230]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  111.057408][ T4230]  ? lock_chain_count+0x20/0x20
[  111.062251][ T4230]  ? __rwlock_init+0x140/0x140
[  111.067010][ T4230]  hci_event_packet+0xe05/0x12f0
[  111.071939][ T4230]  ? lockdep_hardirqs_on+0x94/0x140
[  111.077134][ T4230]  ? rcu_lock_release+0x20/0x20
[  111.081981][ T4230]  ? hci_send_to_monitor+0x9c/0x4a0
[  111.087175][ T4230]  hci_rx_work+0x255/0xa10
[  111.091590][ T4230]  process_one_work+0x863/0x1000
[  111.096531][ T4230]  ? worker_detach_from_pool+0x240/0x240
[  111.102149][ T4230]  ? lockdep_hardirqs_off+0x70/0x100
[  111.107428][ T4230]  ? _raw_spin_lock_irq+0xab/0xe0
[  111.112440][ T4230]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  111.117807][ T4230]  ? wq_worker_running+0x97/0x170
[  111.122835][ T4230]  worker_thread+0xaa8/0x12a0
[  111.127511][ T4230]  ? _raw_spin_unlock_irqrestore+0x82/0x100
[  111.133393][ T4230]  ? lockdep_hardirqs_on+0x94/0x140
[  111.138590][ T4230]  ? lockdep_hardirqs_on+0x94/0x140
[  111.143779][ T4230]  ? _raw_spin_unlock_irqrestore+0xaa/0x100
[  111.149674][ T4230]  kthread+0x436/0x520
[  111.153730][ T4230]  ? rcu_lock_release+0x20/0x20
[  111.158569][ T4230]  ? kthread_blkcg+0xd0/0xd0
[  111.163154][ T4230]  ret_from_fork+0x1f/0x30
[  111.167579][ T4230]  </TASK>
[  111.170584][ T4229] CPU: 0 PID: 4229 Comm: kworker/u5:1 Not tainted syzkaller #0
[  111.178134][ T4229] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  111.188183][ T4229] Workqueue: hci4 hci_rx_work
[  111.192866][ T4229] Call Trace:
[  111.196141][ T4229]  <TASK>
[  111.197223][ T4230] kobject_add_internal failed for hci3:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  111.199064][ T4229]  dump_stack_lvl+0x168/0x230
2025/11/27 04:45:22 executed programs: 212
[  111.212379][ T4230] Bluetooth: hci3: failed to register connection device
[  111.216910][ T4229]  ? show_regs_print_info+0x20/0x20
[  111.228998][ T4229]  ? load_image+0x3b0/0x3b0
[  111.233535][ T4229]  sysfs_create_dir_ns+0x252/0x280
[  111.238655][ T4229]  ? __lock_acquire+0x7c60/0x7c60
[  111.243688][ T4229]  ? sysfs_warn_dup+0xa0/0xa0
[  111.248366][ T4229]  ? le_conn_complete_evt+0xcbc/0x1590
[  111.253844][ T4229]  ? hci_event_packet+0xe05/0x12f0
[  111.258966][ T4229]  ? process_one_work+0x863/0x1000
[  111.264086][ T4229]  ? do_raw_spin_unlock+0x11d/0x230
[  111.269287][ T4229]  kobject_add_internal+0x662/0xd00
[  111.274493][ T4229]  kobject_add+0x152/0x210
[  111.278932][ T4229]  ? kobject_init+0x1d0/0x1d0
[  111.283617][ T4229]  ? klist_children_get+0x50/0x50
[  111.288641][ T4229]  ? get_device_parent+0x121/0x3f0
[  111.293761][ T4229]  device_add+0x483/0xfb0
[  111.298103][ T4229]  hci_conn_add_sysfs+0xd1/0x1e0
[  111.303043][ T4229]  le_conn_complete_evt+0xcbc/0x1590
[  111.308344][ T4229]  ? cs_le_create_conn+0x5e0/0x5e0
[  111.313469][ T4229]  ? mark_lock+0x94/0x320
[  111.317815][ T4229]  ? __mutex_trylock_common+0x14f/0x250
[  111.323369][ T4229]  hci_le_meta_evt+0x289/0x3b80
[  111.328222][ T4229]  ? hci_event_packet+0x36d/0x12f0
[  111.329537][ T4296] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:201'
[  111.333343][ T4229]  ? hci_event_packet+0x2e2/0x12f0
[  111.333369][ T4229]  ? __lock_acquire+0x7c60/0x7c60
[  111.333397][ T4229]  ? hci_remote_host_features_evt+0x280/0x280
[  111.358955][ T4229]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  111.364586][ T4229]  ? mark_lock+0x94/0x320
[  111.368910][ T4229]  ? mutex_unlock+0x10/0x10
[  111.373415][ T4229]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  111.379398][ T4229]  ? lock_chain_count+0x20/0x20
[  111.384246][ T4229]  ? __rwlock_init+0x140/0x140
[  111.389000][ T4229]  hci_event_packet+0xe05/0x12f0
[  111.393929][ T4229]  ? lockdep_hardirqs_on+0x94/0x140
[  111.399121][ T4229]  ? rcu_lock_release+0x20/0x20
[  111.403970][ T4229]  ? hci_send_to_monitor+0x9c/0x4a0
[  111.409161][ T4229]  ? hci_rx_work+0x63e/0xa10
[  111.413739][ T4229]  hci_rx_work+0x255/0xa10
[  111.418156][ T4229]  process_one_work+0x863/0x1000
[  111.423094][ T4229]  ? worker_detach_from_pool+0x240/0x240
[  111.428717][ T4229]  ? lockdep_hardirqs_off+0x70/0x100
[  111.433994][ T4229]  ? _raw_spin_lock_irq+0xab/0xe0
[  111.439005][ T4229]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  111.444363][ T4229]  ? wq_worker_running+0x97/0x170
[  111.449375][ T4229]  worker_thread+0xaa8/0x12a0
[  111.454068][ T4229]  kthread+0x436/0x520
[  111.458124][ T4229]  ? rcu_lock_release+0x20/0x20
[  111.462964][ T4229]  ? kthread_blkcg+0xd0/0xd0
[  111.467542][ T4229]  ret_from_fork+0x1f/0x30
[  111.471962][ T4229]  </TASK>
[  111.474971][ T4296] CPU: 1 PID: 4296 Comm: kworker/u5:5 Not tainted syzkaller #0
[  111.482516][ T4296] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  111.492569][ T4296] Workqueue: hci1 hci_rx_work
[  111.497252][ T4296] Call Trace:
[  111.500527][ T4296]  <TASK>
[  111.503456][ T4296]  dump_stack_lvl+0x168/0x230
[  111.504996][ T4229] kobject_add_internal failed for hci4:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  111.508135][ T4296]  ? show_regs_print_info+0x20/0x20
[  111.508160][ T4296]  ? load_image+0x3b0/0x3b0
[  111.508191][ T4296]  sysfs_create_dir_ns+0x252/0x280
[  111.530562][ T4229] Bluetooth: hci4: failed to register connection device
[  111.531047][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  111.531073][ T4296]  ? sysfs_warn_dup+0xa0/0xa0
[  111.536943][ T4229] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:201'
[  111.543063][ T4296]  ? le_conn_complete_evt+0xcbc/0x1590
[  111.543087][ T4296]  ? hci_event_packet+0xe05/0x12f0
[  111.543107][ T4296]  ? process_one_work+0x863/0x1000
[  111.577781][ T4296]  ? do_raw_spin_unlock+0x11d/0x230
[  111.582974][ T4296]  kobject_add_internal+0x662/0xd00
[  111.588173][ T4296]  kobject_add+0x152/0x210
[  111.592582][ T4296]  ? kobject_init+0x1d0/0x1d0
[  111.597256][ T4296]  ? klist_children_get+0x50/0x50
[  111.602269][ T4296]  ? get_device_parent+0x121/0x3f0
[  111.607373][ T4296]  device_add+0x483/0xfb0
[  111.611699][ T4296]  hci_conn_add_sysfs+0xd1/0x1e0
[  111.616634][ T4296]  le_conn_complete_evt+0xcbc/0x1590
[  111.621915][ T4296]  ? cs_le_create_conn+0x5e0/0x5e0
[  111.627019][ T4296]  ? __mutex_trylock_common+0x14f/0x250
[  111.632561][ T4296]  hci_le_meta_evt+0x289/0x3b80
[  111.637403][ T4296]  ? hci_event_packet+0x36d/0x12f0
[  111.642502][ T4296]  ? hci_event_packet+0x2e2/0x12f0
[  111.647605][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  111.652626][ T4296]  ? hci_remote_host_features_evt+0x280/0x280
[  111.658684][ T4296]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  111.664307][ T4296]  ? mark_lock+0x94/0x320
[  111.668624][ T4296]  ? mutex_unlock+0x10/0x10
[  111.673121][ T4296]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  111.679096][ T4296]  ? lock_chain_count+0x20/0x20
[  111.683937][ T4296]  ? __rwlock_init+0x140/0x140
[  111.688696][ T4296]  hci_event_packet+0xe05/0x12f0
[  111.693628][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  111.698828][ T4296]  ? rcu_lock_release+0x20/0x20
[  111.703673][ T4296]  ? hci_send_to_monitor+0x9c/0x4a0
[  111.708864][ T4296]  hci_rx_work+0x255/0xa10
[  111.713278][ T4296]  process_one_work+0x863/0x1000
[  111.718215][ T4296]  ? worker_detach_from_pool+0x240/0x240
[  111.723835][ T4296]  ? lockdep_hardirqs_off+0x70/0x100
[  111.729113][ T4296]  ? _raw_spin_lock_irq+0xab/0xe0
[  111.734131][ T4296]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  111.739506][ T4296]  ? wq_worker_running+0x97/0x170
[  111.744530][ T4296]  worker_thread+0xaa8/0x12a0
[  111.749200][ T4296]  ? _raw_spin_unlock_irqrestore+0x82/0x100
[  111.755082][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  111.760279][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  111.765464][ T4296]  ? _raw_spin_unlock_irqrestore+0xaa/0x100
[  111.771353][ T4296]  kthread+0x436/0x520
[  111.775416][ T4296]  ? rcu_lock_release+0x20/0x20
[  111.780263][ T4296]  ? kthread_blkcg+0xd0/0xd0
[  111.784856][ T4296]  ret_from_fork+0x1f/0x30
[  111.789296][ T4296]  </TASK>
[  111.792301][ T4229] CPU: 0 PID: 4229 Comm: kworker/u5:1 Not tainted syzkaller #0
[  111.799850][ T4229] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  111.809006][ T4296] kobject_add_internal failed for hci1:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  111.809904][ T4229] Workqueue: hci4 hci_rx_work
[  111.809928][ T4229] Call Trace:
[  111.809936][ T4229]  <TASK>
[  111.809943][ T4229]  dump_stack_lvl+0x168/0x230
[  111.823296][ T4296] Bluetooth: hci1: failed to register connection device
[  111.827752][ T4229]  ? show_regs_print_info+0x20/0x20
[  111.827777][ T4229]  ? load_image+0x3b0/0x3b0
[  111.855228][ T4229]  sysfs_create_dir_ns+0x252/0x280
[  111.860348][ T4229]  ? __lock_acquire+0x7c60/0x7c60
[  111.865378][ T4229]  ? sysfs_warn_dup+0xa0/0xa0
[  111.870059][ T4229]  ? le_conn_complete_evt+0xcbc/0x1590
[  111.875545][ T4229]  ? hci_event_packet+0xe05/0x12f0
[  111.880661][ T4229]  ? process_one_work+0x863/0x1000
[  111.883799][ T4296] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:201'
[  111.885776][ T4229]  ? do_raw_spin_unlock+0x11d/0x230
[  111.885804][ T4229]  kobject_add_internal+0x662/0xd00
[  111.905627][ T4229]  kobject_add+0x152/0x210
[  111.910056][ T4229]  ? kobject_init+0x1d0/0x1d0
[  111.914725][ T4229]  ? klist_children_get+0x50/0x50
[  111.919765][ T4229]  ? get_device_parent+0x121/0x3f0
[  111.924870][ T4229]  device_add+0x483/0xfb0
[  111.929204][ T4229]  hci_conn_add_sysfs+0xd1/0x1e0
[  111.934137][ T4229]  le_conn_complete_evt+0xcbc/0x1590
[  111.939431][ T4229]  ? cs_le_create_conn+0x5e0/0x5e0
[  111.944541][ T4229]  ? __mutex_trylock_common+0x14f/0x250
[  111.950101][ T4229]  hci_le_meta_evt+0x289/0x3b80
[  111.954946][ T4229]  ? hci_event_packet+0x36d/0x12f0
[  111.960047][ T4229]  ? hci_event_packet+0x2e2/0x12f0
[  111.965157][ T4229]  ? __lock_acquire+0x7c60/0x7c60
[  111.970174][ T4229]  ? lock_chain_count+0x20/0x20
[  111.975021][ T4229]  ? hci_remote_host_features_evt+0x280/0x280
[  111.981079][ T4229]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  111.986707][ T4229]  ? mark_lock+0x94/0x320
[  111.986893][ T4797] Bluetooth: hci0: command 0x0406 tx timeout
[  111.991027][ T4229]  ? mutex_unlock+0x10/0x10
[  111.991049][ T4229]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  111.991072][ T4229]  ? lock_chain_count+0x20/0x20
[  111.991091][ T4229]  ? __rwlock_init+0x140/0x140
[  112.017054][ T4229]  hci_event_packet+0xe05/0x12f0
[  112.021990][ T4229]  ? lockdep_hardirqs_on+0x94/0x140
[  112.027185][ T4229]  ? rcu_lock_release+0x20/0x20
[  112.032031][ T4229]  ? hci_send_to_monitor+0x9c/0x4a0
[  112.037217][ T4229]  ? hci_rx_work+0x63e/0xa10
[  112.041811][ T4229]  hci_rx_work+0x255/0xa10
[  112.046233][ T4229]  process_one_work+0x863/0x1000
[  112.051171][ T4229]  ? worker_detach_from_pool+0x240/0x240
[  112.056790][ T4229]  ? lockdep_hardirqs_off+0x70/0x100
[  112.062066][ T4229]  ? _raw_spin_lock_irq+0xab/0xe0
[  112.067077][ T4229]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  112.072444][ T4229]  ? wq_worker_running+0x97/0x170
[  112.077462][ T4229]  worker_thread+0xaa8/0x12a0
[  112.082152][ T4229]  kthread+0x436/0x520
[  112.086210][ T4229]  ? rcu_lock_release+0x20/0x20
[  112.091049][ T4229]  ? kthread_blkcg+0xd0/0xd0
[  112.095634][ T4229]  ret_from_fork+0x1f/0x30
[  112.100050][ T4229]  </TASK>
[  112.103160][ T4296] CPU: 1 PID: 4296 Comm: kworker/u5:5 Not tainted syzkaller #0
[  112.110708][ T4296] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  112.120761][ T4296] Workqueue: hci3 hci_rx_work
[  112.125444][ T4296] Call Trace:
[  112.128736][ T4296]  <TASK>
[  112.131667][ T4296]  dump_stack_lvl+0x168/0x230
[  112.136360][ T4296]  ? show_regs_print_info+0x20/0x20
[  112.141575][ T4296]  ? load_image+0x3b0/0x3b0
[  112.146094][ T4296]  sysfs_create_dir_ns+0x252/0x280
[  112.151211][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  112.152135][ T4229] kobject_add_internal failed for hci4:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  112.156243][ T4296]  ? sysfs_warn_dup+0xa0/0xa0
[  112.156266][ T4296]  ? le_conn_complete_evt+0xcbc/0x1590
[  112.156285][ T4296]  ? hci_event_packet+0xe05/0x12f0
[  112.169659][ T4229] Bluetooth: hci4: failed to register connection device
[  112.174107][ T4296]  ? process_one_work+0x863/0x1000
[  112.174130][ T4296]  ? do_raw_spin_unlock+0x11d/0x230
[  112.201845][ T4296]  kobject_add_internal+0x662/0xd00
[  112.207053][ T4296]  kobject_add+0x152/0x210
[  112.211478][ T4296]  ? kobject_init+0x1d0/0x1d0
[  112.216167][ T4296]  ? klist_children_get+0x50/0x50
[  112.221193][ T4296]  ? get_device_parent+0x121/0x3f0
[  112.226308][ T4296]  device_add+0x483/0xfb0
[  112.230655][ T4296]  hci_conn_add_sysfs+0xd1/0x1e0
[  112.235599][ T4296]  le_conn_complete_evt+0xcbc/0x1590
[  112.240899][ T4296]  ? cs_le_create_conn+0x5e0/0x5e0
[  112.246018][ T4296]  ? __mutex_trylock_common+0x14f/0x250
[  112.251575][ T4296]  hci_le_meta_evt+0x289/0x3b80
[  112.256433][ T4296]  ? hci_event_packet+0x36d/0x12f0
[  112.261560][ T4296]  ? hci_event_packet+0x2e2/0x12f0
[  112.266694][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  112.271732][ T4296]  ? hci_remote_host_features_evt+0x280/0x280
[  112.277807][ T4296]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  112.283445][ T4296]  ? mark_lock+0x94/0x320
[  112.287788][ T4296]  ? mutex_unlock+0x10/0x10
[  112.292303][ T4296]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  112.298298][ T4296]  ? lock_chain_count+0x20/0x20
[  112.303152][ T4296]  ? __rwlock_init+0x140/0x140
[  112.307921][ T4296]  hci_event_packet+0xe05/0x12f0
[  112.312862][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  112.318068][ T4296]  ? rcu_lock_release+0x20/0x20
[  112.322919][ T4296]  ? hci_send_to_monitor+0x9c/0x4a0
[  112.328121][ T4296]  hci_rx_work+0x255/0xa10
[  112.332524][ T4296]  process_one_work+0x863/0x1000
[  112.337446][ T4296]  ? worker_detach_from_pool+0x240/0x240
[  112.343059][ T4296]  ? lockdep_hardirqs_off+0x70/0x100
[  112.348323][ T4296]  ? _raw_spin_lock_irq+0xab/0xe0
[  112.352943][ T1324] Bluetooth: hci1: command 0x0406 tx timeout
[  112.353325][ T4296]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  112.353350][ T4296]  ? wq_worker_running+0x97/0x170
[  112.360588][  T146] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:201'
[  112.364652][ T4296]  worker_thread+0xaa8/0x12a0
[  112.364675][ T4296]  ? _raw_spin_unlock_irqrestore+0x82/0x100
[  112.389603][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  112.394805][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  112.400014][ T4296]  ? _raw_spin_unlock_irqrestore+0xaa/0x100
[  112.405907][ T4296]  kthread+0x436/0x520
[  112.409970][ T4296]  ? rcu_lock_release+0x20/0x20
[  112.414812][ T4296]  ? kthread_blkcg+0xd0/0xd0
[  112.419391][ T4296]  ret_from_fork+0x1f/0x30
[  112.423807][ T4296]  </TASK>
[  112.426813][  T146] CPU: 0 PID: 146 Comm: kworker/u5:0 Not tainted syzkaller #0
[  112.434265][  T146] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  112.444303][  T146] Workqueue: hci1 hci_rx_work
[  112.448964][  T146] Call Trace:
[  112.452226][  T146]  <TASK>
[  112.455140][  T146]  dump_stack_lvl+0x168/0x230
[  112.459802][  T146]  ? show_regs_print_info+0x20/0x20
[  112.464984][  T146]  ? load_image+0x3b0/0x3b0
[  112.469481][  T146]  sysfs_create_dir_ns+0x252/0x280
[  112.474578][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  112.479584][  T146]  ? sysfs_warn_dup+0xa0/0xa0
[  112.484241][  T146]  ? le_conn_complete_evt+0xcbc/0x1590
[  112.489683][  T146]  ? hci_event_packet+0xe05/0x12f0
[  112.494780][  T146]  ? process_one_work+0x863/0x1000
[  112.499875][  T146]  ? do_raw_spin_unlock+0x11d/0x230
[  112.505053][  T146]  kobject_add_internal+0x662/0xd00
[  112.510239][  T146]  kobject_add+0x152/0x210
[  112.514639][  T146]  ? kobject_init+0x1d0/0x1d0
[  112.519299][  T146]  ? klist_children_get+0x50/0x50
[  112.524318][  T146]  ? get_device_parent+0x121/0x3f0
[  112.529418][  T146]  device_add+0x483/0xfb0
[  112.533739][  T146]  hci_conn_add_sysfs+0xd1/0x1e0
[  112.538673][  T146]  le_conn_complete_evt+0xcbc/0x1590
[  112.543966][  T146]  ? cs_le_create_conn+0x5e0/0x5e0
[  112.549064][  T146]  ? __mutex_trylock_common+0x14f/0x250
[  112.554597][  T146]  hci_le_meta_evt+0x289/0x3b80
[  112.559466][  T146]  ? hci_event_packet+0x36d/0x12f0
[  112.564570][  T146]  ? hci_event_packet+0x2e2/0x12f0
[  112.569664][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  112.574679][  T146]  ? hci_remote_host_features_evt+0x280/0x280
[  112.580742][  T146]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  112.586378][  T146]  ? mark_lock+0x94/0x320
[  112.590701][  T146]  ? mutex_unlock+0x10/0x10
[  112.595193][  T146]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  112.601177][  T146]  ? lock_chain_count+0x20/0x20
[  112.606013][  T146]  ? __rwlock_init+0x140/0x140
[  112.610757][  T146]  hci_event_packet+0xe05/0x12f0
[  112.615687][  T146]  ? lockdep_hardirqs_on+0x94/0x140
[  112.620883][  T146]  ? rcu_lock_release+0x20/0x20
[  112.625741][  T146]  ? hci_send_to_monitor+0x9c/0x4a0
[  112.630923][  T146]  hci_rx_work+0x255/0xa10
[  112.635329][  T146]  process_one_work+0x863/0x1000
[  112.640257][  T146]  ? worker_detach_from_pool+0x240/0x240
[  112.645869][  T146]  ? lockdep_hardirqs_off+0x70/0x100
[  112.651135][  T146]  ? _raw_spin_lock_irq+0xab/0xe0
[  112.656139][  T146]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  112.661493][  T146]  ? wq_worker_running+0x97/0x170
[  112.666533][  T146]  worker_thread+0xaa8/0x12a0
[  112.671208][  T146]  kthread+0x436/0x520
[  112.675258][  T146]  ? rcu_lock_release+0x20/0x20
[  112.680088][  T146]  ? kthread_blkcg+0xd0/0xd0
[  112.684699][  T146]  ret_from_fork+0x1f/0x30
[  112.689109][  T146]  </TASK>
[  112.711982][  T146] kobject_add_internal failed for hci1:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  112.715999][ T4296] kobject_add_internal failed for hci3:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  112.725362][  T146] Bluetooth: hci1: failed to register connection device
[  112.748396][ T4296] Bluetooth: hci3: failed to register connection device
[  112.750031][ T1324] Bluetooth: hci3: command 0x0406 tx timeout
[  112.827491][  T146] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:201'
[  112.830837][ T4296] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:201'
[  112.837436][  T146] CPU: 0 PID: 146 Comm: kworker/u5:0 Not tainted syzkaller #0
[  112.853887][  T146] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  112.863930][  T146] Workqueue: hci3 hci_rx_work
[  112.868615][  T146] Call Trace:
[  112.871878][  T146]  <TASK>
[  112.874796][  T146]  dump_stack_lvl+0x168/0x230
[  112.879464][  T146]  ? show_regs_print_info+0x20/0x20
[  112.884651][  T146]  ? load_image+0x3b0/0x3b0
[  112.889164][  T146]  sysfs_create_dir_ns+0x252/0x280
[  112.894265][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  112.899278][  T146]  ? sysfs_warn_dup+0xa0/0xa0
[  112.903954][  T146]  ? le_conn_complete_evt+0xcbc/0x1590
[  112.909405][  T146]  ? hci_event_packet+0xe05/0x12f0
[  112.914507][  T146]  ? process_one_work+0x863/0x1000
[  112.919606][  T146]  ? do_raw_spin_unlock+0x11d/0x230
[  112.924804][  T146]  kobject_add_internal+0x662/0xd00
[  112.929997][  T146]  kobject_add+0x152/0x210
[  112.934414][  T146]  ? kobject_init+0x1d0/0x1d0
[  112.939088][  T146]  ? klist_children_get+0x50/0x50
[  112.944099][  T146]  ? get_device_parent+0x121/0x3f0
[  112.949206][  T146]  device_add+0x483/0xfb0
[  112.953539][  T146]  hci_conn_add_sysfs+0xd1/0x1e0
[  112.958476][  T146]  le_conn_complete_evt+0xcbc/0x1590
[  112.963760][  T146]  ? cs_le_create_conn+0x5e0/0x5e0
[  112.968863][  T146]  ? __mutex_trylock_common+0x14f/0x250
[  112.974403][  T146]  hci_le_meta_evt+0x289/0x3b80
[  112.979241][  T146]  ? hci_event_packet+0x36d/0x12f0
[  112.984339][  T146]  ? hci_event_packet+0x2e2/0x12f0
[  112.989438][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  112.994458][  T146]  ? hci_remote_host_features_evt+0x280/0x280
[  113.000513][  T146]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  113.006146][  T146]  ? mark_lock+0x94/0x320
[  113.010471][  T146]  ? mutex_unlock+0x10/0x10
[  113.014963][  T146]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  113.020933][  T146]  ? lock_chain_count+0x20/0x20
[  113.025771][  T146]  ? __rwlock_init+0x140/0x140
[  113.030524][  T146]  hci_event_packet+0xe05/0x12f0
[  113.035450][  T146]  ? lockdep_hardirqs_on+0x94/0x140
[  113.040651][  T146]  ? rcu_lock_release+0x20/0x20
[  113.045509][  T146]  ? hci_send_to_monitor+0x9c/0x4a0
[  113.050709][  T146]  hci_rx_work+0x255/0xa10
[  113.055131][  T146]  process_one_work+0x863/0x1000
[  113.060079][  T146]  ? worker_detach_from_pool+0x240/0x240
[  113.065701][  T146]  ? lockdep_hardirqs_off+0x70/0x100
[  113.070979][  T146]  ? _raw_spin_lock_irq+0xab/0xe0
[  113.075992][  T146]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  113.081362][  T146]  ? wq_worker_running+0x97/0x170
[  113.086376][  T146]  worker_thread+0xaa8/0x12a0
[  113.091065][  T146]  kthread+0x436/0x520
[  113.095150][  T146]  ? rcu_lock_release+0x20/0x20
[  113.099987][  T146]  ? kthread_blkcg+0xd0/0xd0
[  113.104565][  T146]  ret_from_fork+0x1f/0x30
[  113.108980][  T146]  </TASK>
[  113.111986][ T4296] CPU: 1 PID: 4296 Comm: kworker/u5:5 Not tainted syzkaller #0
[  113.119551][ T4296] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  113.119631][  T146] kobject_add_internal failed for hci3:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  113.129597][ T4296] Workqueue: hci1 hci_rx_work
[  113.129620][ T4296] Call Trace:
[  113.129627][ T4296]  <TASK>
[  113.129635][ T4296]  dump_stack_lvl+0x168/0x230
[  113.129660][ T4296]  ? show_regs_print_info+0x20/0x20
[  113.129680][ T4296]  ? load_image+0x3b0/0x3b0
[  113.129710][ T4296]  sysfs_create_dir_ns+0x252/0x280
[  113.129731][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  113.129752][ T4296]  ? sysfs_warn_dup+0xa0/0xa0
[  113.129770][ T4296]  ? le_conn_complete_evt+0xcbc/0x1590
[  113.129788][ T4296]  ? hci_event_packet+0xe05/0x12f0
[  113.129807][ T4296]  ? process_one_work+0x863/0x1000
[  113.129827][ T4296]  ? do_raw_spin_unlock+0x11d/0x230
[  113.143669][  T146] Bluetooth: hci3: failed to register connection device
[  113.147660][ T4296]  kobject_add_internal+0x662/0xd00
[  113.147690][ T4296]  kobject_add+0x152/0x210
[  113.154566][ T4372] Bluetooth: hci2: command 0x0406 tx timeout
[  113.158524][ T4296]  ? kobject_init+0x1d0/0x1d0
[  113.230724][ T4296]  ? klist_children_get+0x50/0x50
[  113.235754][ T4296]  ? get_device_parent+0x121/0x3f0
[  113.240864][ T4296]  device_add+0x483/0xfb0
[  113.245187][ T4296]  hci_conn_add_sysfs+0xd1/0x1e0
[  113.250121][ T4296]  le_conn_complete_evt+0xcbc/0x1590
[  113.255399][ T4296]  ? cs_le_create_conn+0x5e0/0x5e0
[  113.260518][ T4296]  ? __mutex_trylock_common+0x14f/0x250
[  113.266043][ T4296]  hci_le_meta_evt+0x289/0x3b80
[  113.270885][ T4296]  ? hci_event_packet+0x36d/0x12f0
[  113.275999][ T4296]  ? hci_event_packet+0x2e2/0x12f0
[  113.281110][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  113.286121][ T4296]  ? hci_remote_host_features_evt+0x280/0x280
[  113.292171][ T4296]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  113.297780][ T4296]  ? mark_lock+0x94/0x320
[  113.302087][ T4296]  ? mutex_unlock+0x10/0x10
[  113.306568][ T4296]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  113.312551][ T4296]  ? lock_chain_count+0x20/0x20
[  113.317418][ T4296]  ? __rwlock_init+0x140/0x140
[  113.322179][ T4296]  hci_event_packet+0xe05/0x12f0
[  113.327112][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  113.331552][  T146] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:201'
[  113.332298][ T4296]  ? rcu_lock_release+0x20/0x20
[  113.346569][ T4296]  ? hci_send_to_monitor+0x9c/0x4a0
[  113.351763][ T4296]  hci_rx_work+0x255/0xa10
[  113.356201][ T4296]  process_one_work+0x863/0x1000
[  113.361138][ T4296]  ? worker_detach_from_pool+0x240/0x240
[  113.366759][ T4296]  ? lockdep_hardirqs_off+0x70/0x100
[  113.372036][ T4296]  ? _raw_spin_lock_irq+0xab/0xe0
[  113.377050][ T4296]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  113.382435][ T4296]  ? wq_worker_running+0x97/0x170
[  113.387458][ T4296]  worker_thread+0xaa8/0x12a0
[  113.392137][ T4296]  ? _raw_spin_unlock_irqrestore+0x82/0x100
[  113.398041][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  113.403232][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  113.408424][ T4296]  ? _raw_spin_unlock_irqrestore+0xaa/0x100
[  113.414322][ T4296]  kthread+0x436/0x520
[  113.418393][ T4296]  ? rcu_lock_release+0x20/0x20
[  113.423229][ T4296]  ? kthread_blkcg+0xd0/0xd0
[  113.427818][ T4296]  ret_from_fork+0x1f/0x30
[  113.432235][ T4296]  </TASK>
[  113.435241][  T146] CPU: 0 PID: 146 Comm: kworker/u5:0 Not tainted syzkaller #0
[  113.442695][  T146] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  113.452746][  T146] Workqueue: hci4 hci_rx_work
[  113.457425][  T146] Call Trace:
[  113.460698][  T146]  <TASK>
[  113.463631][  T146]  dump_stack_lvl+0x168/0x230
[  113.468315][  T146]  ? show_regs_print_info+0x20/0x20
[  113.473518][  T146]  ? load_image+0x3b0/0x3b0
[  113.478034][  T146]  sysfs_create_dir_ns+0x252/0x280
[  113.483158][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  113.488191][  T146]  ? sysfs_warn_dup+0xa0/0xa0
[  113.492869][  T146]  ? le_conn_complete_evt+0xcbc/0x1590
[  113.498329][  T146]  ? hci_event_packet+0xe05/0x12f0
[  113.503441][  T146]  ? process_one_work+0x863/0x1000
[  113.508558][  T146]  ? do_raw_spin_unlock+0x11d/0x230
[  113.513765][  T146]  kobject_add_internal+0x662/0xd00
[  113.518968][  T146]  kobject_add+0x152/0x210
[  113.523390][  T146]  ? kobject_init+0x1d0/0x1d0
[  113.528082][  T146]  ? klist_children_get+0x50/0x50
[  113.533116][  T146]  ? get_device_parent+0x121/0x3f0
[  113.538230][  T146]  device_add+0x483/0xfb0
[  113.542555][  T146]  hci_conn_add_sysfs+0xd1/0x1e0
[  113.547479][  T146]  le_conn_complete_evt+0xcbc/0x1590
[  113.552755][  T146]  ? cs_le_create_conn+0x5e0/0x5e0
[  113.557857][  T146]  ? __mutex_trylock_common+0x14f/0x250
[  113.563389][  T146]  hci_le_meta_evt+0x289/0x3b80
[  113.568229][  T146]  ? hci_event_packet+0x36d/0x12f0
[  113.573323][  T146]  ? hci_event_packet+0x2e2/0x12f0
[  113.578417][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  113.583428][  T146]  ? hci_remote_host_features_evt+0x280/0x280
[  113.589474][  T146]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  113.595098][  T146]  ? mark_lock+0x94/0x320
[  113.599440][  T146]  ? mutex_unlock+0x10/0x10
[  113.603931][  T146]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  113.609896][  T146]  ? lock_chain_count+0x20/0x20
[  113.614727][  T146]  ? __rwlock_init+0x140/0x140
[  113.619483][  T146]  hci_event_packet+0xe05/0x12f0
[  113.624435][  T146]  ? lockdep_hardirqs_on+0x94/0x140
[  113.629628][  T146]  ? rcu_lock_release+0x20/0x20
[  113.634468][  T146]  ? hci_send_to_monitor+0x9c/0x4a0
[  113.639650][  T146]  hci_rx_work+0x255/0xa10
[  113.644054][  T146]  process_one_work+0x863/0x1000
[  113.648990][  T146]  ? worker_detach_from_pool+0x240/0x240
[  113.654604][  T146]  ? lockdep_hardirqs_off+0x70/0x100
[  113.659885][  T146]  ? _raw_spin_lock_irq+0xab/0xe0
[  113.664887][  T146]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  113.670242][  T146]  ? wq_worker_running+0x97/0x170
[  113.675251][  T146]  worker_thread+0xaa8/0x12a0
[  113.679927][  T146]  kthread+0x436/0x520
[  113.683974][  T146]  ? rcu_lock_release+0x20/0x20
[  113.688841][  T146]  ? kthread_blkcg+0xd0/0xd0
[  113.693411][  T146]  ret_from_fork+0x1f/0x30
[  113.697819][  T146]  </TASK>
[  113.704770][  T146] kobject_add_internal failed for hci4:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  113.723023][  T146] Bluetooth: hci4: failed to register connection device
[  113.732252][ T4296] kobject_add_internal failed for hci1:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  113.745593][ T4296] Bluetooth: hci1: failed to register connection device
[  113.807784][  T146] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:201'
[  113.817408][  T146] CPU: 0 PID: 146 Comm: kworker/u5:0 Not tainted syzkaller #0
[  113.819156][ T4296] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:201'
[  113.824861][  T146] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  113.824874][  T146] Workqueue: hci4 hci_rx_work
[  113.824897][  T146] Call Trace:
[  113.824904][  T146]  <TASK>
[  113.824912][  T146]  dump_stack_lvl+0x168/0x230
[  113.824940][  T146]  ? show_regs_print_info+0x20/0x20
[  113.824961][  T146]  ? load_image+0x3b0/0x3b0
[  113.824991][  T146]  sysfs_create_dir_ns+0x252/0x280
[  113.825012][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  113.825033][  T146]  ? sysfs_warn_dup+0xa0/0xa0
[  113.825050][  T146]  ? le_conn_complete_evt+0xcbc/0x1590
[  113.825068][  T146]  ? hci_event_packet+0xe05/0x12f0
[  113.825087][  T146]  ? process_one_work+0x863/0x1000
[  113.825107][  T146]  ? do_raw_spin_unlock+0x11d/0x230
[  113.825130][  T146]  kobject_add_internal+0x662/0xd00
[  113.825157][  T146]  kobject_add+0x152/0x210
[  113.825179][  T146]  ? kobject_init+0x1d0/0x1d0
[  113.825203][  T146]  ? klist_children_get+0x50/0x50
[  113.825221][  T146]  ? get_device_parent+0x121/0x3f0
[  113.825245][  T146]  device_add+0x483/0xfb0
[  113.825275][  T146]  hci_conn_add_sysfs+0xd1/0x1e0
[  113.825298][  T146]  le_conn_complete_evt+0xcbc/0x1590
[  113.825327][  T146]  ? cs_le_create_conn+0x5e0/0x5e0
[  113.825353][  T146]  ? __mutex_trylock_common+0x14f/0x250
[  113.825379][  T146]  hci_le_meta_evt+0x289/0x3b80
[  113.825399][  T146]  ? hci_event_packet+0x36d/0x12f0
[  113.825419][  T146]  ? hci_event_packet+0x2e2/0x12f0
[  113.825441][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  113.825470][  T146]  ? hci_remote_host_features_evt+0x280/0x280
[  113.825490][  T146]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  113.825511][  T146]  ? mark_lock+0x94/0x320
[  113.825530][  T146]  ? mutex_unlock+0x10/0x10
[  113.825550][  T146]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  113.825574][  T146]  ? lock_chain_count+0x20/0x20
[  113.825600][  T146]  ? __rwlock_init+0x140/0x140
[  113.825621][  T146]  hci_event_packet+0xe05/0x12f0
[  113.825640][  T146]  ? lockdep_hardirqs_on+0x94/0x140
[  113.825662][  T146]  ? rcu_lock_release+0x20/0x20
[  113.825687][  T146]  ? hci_send_to_monitor+0x9c/0x4a0
[  113.825708][  T146]  hci_rx_work+0x255/0xa10
[  113.825738][  T146]  process_one_work+0x863/0x1000
[  113.825769][  T146]  ? worker_detach_from_pool+0x240/0x240
[  113.825786][  T146]  ? lockdep_hardirqs_off+0x70/0x100
[  113.825808][  T146]  ? _raw_spin_lock_irq+0xab/0xe0
[  114.056529][  T146]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  114.061901][  T146]  ? wq_worker_running+0x97/0x170
[  114.066919][  T146]  worker_thread+0xaa8/0x12a0
[  114.071615][  T146]  kthread+0x436/0x520
[  114.075672][  T146]  ? rcu_lock_release+0x20/0x20
[  114.080535][  T146]  ? kthread_blkcg+0xd0/0xd0
[  114.085122][  T146]  ret_from_fork+0x1f/0x30
[  114.089536][  T146]  </TASK>
[  114.092546][ T4296] CPU: 1 PID: 4296 Comm: kworker/u5:5 Not tainted syzkaller #0
[  114.100098][ T4296] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  114.100679][  T146] kobject_add_internal failed for hci4:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  114.110142][ T4296] Workqueue: hci3 hci_rx_work
[  114.110166][ T4296] Call Trace:
[  114.110173][ T4296]  <TASK>
[  114.123412][  T146] Bluetooth: hci4: failed to register connection device
[  114.127970][ T4296]  dump_stack_lvl+0x168/0x230
[  114.145734][ T4296]  ? show_regs_print_info+0x20/0x20
[  114.150938][ T4296]  ? load_image+0x3b0/0x3b0
[  114.155452][ T4296]  sysfs_create_dir_ns+0x252/0x280
[  114.160563][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  114.165599][ T4296]  ? sysfs_warn_dup+0xa0/0xa0
[  114.170277][ T4296]  ? le_conn_complete_evt+0xcbc/0x1590
[  114.175745][ T4296]  ? hci_event_packet+0xe05/0x12f0
[  114.180874][ T4296]  ? process_one_work+0x863/0x1000
[  114.185988][ T4296]  ? do_raw_spin_unlock+0x11d/0x230
[  114.190353][ T1324] Bluetooth: hci4: command 0x0406 tx timeout
[  114.191196][ T4296]  kobject_add_internal+0x662/0xd00
[  114.191226][ T4296]  kobject_add+0x152/0x210
[  114.206744][ T4296]  ? kobject_init+0x1d0/0x1d0
[  114.211423][ T4296]  ? klist_children_get+0x50/0x50
[  114.216449][ T4296]  ? get_device_parent+0x121/0x3f0
[  114.221568][ T4296]  device_add+0x483/0xfb0
[  114.225917][ T4296]  hci_conn_add_sysfs+0xd1/0x1e0
[  114.230861][ T4296]  le_conn_complete_evt+0xcbc/0x1590
[  114.236164][ T4296]  ? cs_le_create_conn+0x5e0/0x5e0
[  114.241283][ T4296]  ? __mutex_trylock_common+0x14f/0x250
[  114.246843][ T4296]  hci_le_meta_evt+0x289/0x3b80
[  114.251697][ T4296]  ? hci_event_packet+0x36d/0x12f0
[  114.256809][ T4296]  ? hci_event_packet+0x2e2/0x12f0
[  114.261927][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  114.266964][ T4296]  ? hci_remote_host_features_evt+0x280/0x280
[  114.273033][ T4296]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  114.278668][ T4296]  ? mark_lock+0x94/0x320
[  114.283007][ T4296]  ? mutex_unlock+0x10/0x10
[  114.287511][ T4296]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  114.293499][ T4296]  ? lock_chain_count+0x20/0x20
[  114.298362][ T4296]  ? __rwlock_init+0x140/0x140
[  114.303131][ T4296]  hci_event_packet+0xe05/0x12f0
[  114.308072][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  114.313294][ T4296]  ? rcu_lock_release+0x20/0x20
[  114.318138][ T4296]  ? hci_send_to_monitor+0x9c/0x4a0
[  114.323343][ T4296]  hci_rx_work+0x255/0xa10
[  114.327777][ T4296]  process_one_work+0x863/0x1000
[  114.332730][ T4296]  ? worker_detach_from_pool+0x240/0x240
[  114.333013][T11879] cgroup: fork rejected by pids controller in 
[  114.338356][ T4296]  ? lockdep_hardirqs_off+0x70/0x100
[  114.338381][ T4296]  ? _raw_spin_lock_irq+0xab/0xe0
[  114.338399][ T4296]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  114.338419][ T4296]  ? wq_worker_running+0x97/0x170
[  114.338437][ T4296]  worker_thread+0xaa8/0x12a0
[  114.338455][ T4296]  ? _raw_spin_unlock_irqrestore+0x82/0x100
[  114.338473][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  114.338497][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  114.338517][ T4296]  ? _raw_spin_unlock_irqrestore+0xaa/0x100
[  114.338544][ T4296]  kthread+0x436/0x520
[  114.338561][ T4296]  ? rcu_lock_release+0x20/0x20
[  114.338577][ T4296]  ? kthread_blkcg+0xd0/0xd0
[  114.338596][ T4296]  ret_from_fork+0x1f/0x30
[  114.338625][ T4296]  </TASK>
[  114.360480][ T4296] kobject_add_internal failed for hci3:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  114.360684][T11879] /syz4
[  114.365782][ T4296] Bluetooth: hci3: failed to register connection device
[  114.370360][T11879] 
[  114.377684][ T4230] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:201'
[  114.449365][  T146] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:201'
[  114.459649][ T4230] CPU: 0 PID: 4230 Comm: kworker/u5:2 Not tainted syzkaller #0
[  114.467206][ T4230] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  114.477255][ T4230] Workqueue: hci1 hci_rx_work
[  114.481930][ T4230] Call Trace:
[  114.485208][ T4230]  <TASK>
[  114.488137][ T4230]  dump_stack_lvl+0x168/0x230
[  114.492827][ T4230]  ? show_regs_print_info+0x20/0x20
[  114.498038][ T4230]  ? load_image+0x3b0/0x3b0
[  114.502556][ T4230]  sysfs_create_dir_ns+0x252/0x280
[  114.507671][ T4230]  ? __lock_acquire+0x7c60/0x7c60
[  114.512701][ T4230]  ? sysfs_warn_dup+0xa0/0xa0
[  114.517387][ T4230]  ? le_conn_complete_evt+0xcbc/0x1590
[  114.522850][ T4230]  ? hci_event_packet+0xe05/0x12f0
[  114.527962][ T4230]  ? process_one_work+0x863/0x1000
[  114.533076][ T4230]  ? do_raw_spin_unlock+0x11d/0x230
[  114.538279][ T4230]  kobject_add_internal+0x662/0xd00
[  114.543482][ T4230]  kobject_add+0x152/0x210
[  114.547897][ T4230]  ? kobject_init+0x1d0/0x1d0
[  114.552572][ T4230]  ? klist_children_get+0x50/0x50
[  114.557588][ T4230]  ? get_device_parent+0x121/0x3f0
[  114.562692][ T4230]  device_add+0x483/0xfb0
[  114.567024][ T4230]  hci_conn_add_sysfs+0xd1/0x1e0
[  114.571966][ T4230]  le_conn_complete_evt+0xcbc/0x1590
[  114.577251][ T4230]  ? cs_le_create_conn+0x5e0/0x5e0
[  114.582357][ T4230]  ? __mutex_trylock_common+0x14f/0x250
[  114.587896][ T4230]  hci_le_meta_evt+0x289/0x3b80
[  114.592735][ T4230]  ? hci_event_packet+0x36d/0x12f0
[  114.597845][ T4230]  ? hci_event_packet+0x2e2/0x12f0
[  114.602953][ T4230]  ? __lock_acquire+0x7c60/0x7c60
[  114.607981][ T4230]  ? hci_remote_host_features_evt+0x280/0x280
[  114.614038][ T4230]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  114.619673][ T4230]  ? mark_lock+0x94/0x320
[  114.623993][ T4230]  ? mutex_unlock+0x10/0x10
[  114.628492][ T4230]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  114.634468][ T4230]  ? lock_chain_count+0x20/0x20
[  114.639310][ T4230]  ? __rwlock_init+0x140/0x140
[  114.644065][ T4230]  hci_event_packet+0xe05/0x12f0
[  114.649000][ T4230]  ? lockdep_hardirqs_on+0x94/0x140
[  114.654195][ T4230]  ? rcu_lock_release+0x20/0x20
[  114.659042][ T4230]  ? hci_send_to_monitor+0x9c/0x4a0
[  114.664239][ T4230]  hci_rx_work+0x255/0xa10
[  114.668656][ T4230]  process_one_work+0x863/0x1000
[  114.673596][ T4230]  ? worker_detach_from_pool+0x240/0x240
[  114.679216][ T4230]  ? lockdep_hardirqs_off+0x70/0x100
[  114.684500][ T4230]  ? _raw_spin_lock_irq+0xab/0xe0
[  114.689518][ T4230]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  114.694883][ T4230]  ? wq_worker_running+0x97/0x170
[  114.699899][ T4230]  worker_thread+0xaa8/0x12a0
[  114.704576][ T4230]  ? _raw_spin_unlock_irqrestore+0x82/0x100
[  114.710461][ T4230]  ? lockdep_hardirqs_on+0x94/0x140
[  114.715666][ T4230]  ? lockdep_hardirqs_on+0x94/0x140
[  114.720875][ T4230]  ? _raw_spin_unlock_irqrestore+0xaa/0x100
[  114.726782][ T4230]  kthread+0x436/0x520
[  114.730840][ T4230]  ? rcu_lock_release+0x20/0x20
[  114.735691][ T4230]  ? kthread_blkcg+0xd0/0xd0
[  114.740270][ T4230]  ret_from_fork+0x1f/0x30
[  114.744685][ T4230]  </TASK>
[  114.747689][  T146] CPU: 1 PID: 146 Comm: kworker/u5:0 Not tainted syzkaller #0
[  114.755151][  T146] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  114.765204][  T146] Workqueue: hci4 hci_rx_work
[  114.769889][  T146] Call Trace:
[  114.773215][  T146]  <TASK>
[  114.774249][ T1324] Bluetooth: hci0: command 0x0406 tx timeout
[  114.776142][  T146]  dump_stack_lvl+0x168/0x230
[  114.776169][  T146]  ? show_regs_print_info+0x20/0x20
[  114.788453][ T4230] kobject_add_internal failed for hci1:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  114.791960][  T146]  ? load_image+0x3b0/0x3b0
[  114.791994][  T146]  sysfs_create_dir_ns+0x252/0x280
[  114.805337][ T4230] Bluetooth: hci1: failed to register connection device
[  114.809631][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  114.826626][  T146]  ? sysfs_warn_dup+0xa0/0xa0
[  114.831301][  T146]  ? le_conn_complete_evt+0xcbc/0x1590
[  114.836764][  T146]  ? hci_event_packet+0xe05/0x12f0
[  114.840466][ T1324] Bluetooth: hci1: command 0x0406 tx timeout
[  114.841875][  T146]  ? process_one_work+0x863/0x1000
[  114.852920][  T146]  ? do_raw_spin_unlock+0x11d/0x230
[  114.858125][  T146]  kobject_add_internal+0x662/0xd00
[  114.863330][  T146]  kobject_add+0x152/0x210
[  114.867752][  T146]  ? kobject_init+0x1d0/0x1d0
[  114.872438][  T146]  ? klist_children_get+0x50/0x50
[  114.877462][  T146]  ? get_device_parent+0x121/0x3f0
[  114.882579][  T146]  device_add+0x483/0xfb0
[  114.886925][  T146]  hci_conn_add_sysfs+0xd1/0x1e0
[  114.891871][  T146]  le_conn_complete_evt+0xcbc/0x1590
[  114.892038][ T1324] Bluetooth: hci3: command 0x0406 tx timeout
[  114.897166][  T146]  ? cs_le_create_conn+0x5e0/0x5e0
[  114.897194][  T146]  ? __mutex_trylock_common+0x14f/0x250
[  114.897221][  T146]  hci_le_meta_evt+0x289/0x3b80
[  114.918628][  T146]  ? hci_event_packet+0x36d/0x12f0
[  114.923746][  T146]  ? hci_event_packet+0x2e2/0x12f0
[  114.928865][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  114.933907][  T146]  ? hci_remote_host_features_evt+0x280/0x280
[  114.939988][  T146]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  114.945625][  T146]  ? mark_lock+0x94/0x320
[  114.949973][  T146]  ? mutex_unlock+0x10/0x10
[  114.954482][  T146]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  114.960469][  T146]  ? lock_chain_count+0x20/0x20
[  114.965318][  T146]  ? __rwlock_init+0x140/0x140
[  114.970085][  T146]  hci_event_packet+0xe05/0x12f0
[  114.973699][ T4296] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:201'
[  114.975025][  T146]  ? lockdep_hardirqs_on+0x94/0x140
[  114.975055][  T146]  ? rcu_lock_release+0x20/0x20
[  114.994497][  T146]  ? hci_send_to_monitor+0x9c/0x4a0
[  114.999720][  T146]  hci_rx_work+0x255/0xa10
[  115.004152][  T146]  process_one_work+0x863/0x1000
[  115.009105][  T146]  ? worker_detach_from_pool+0x240/0x240
[  115.014735][  T146]  ? lockdep_hardirqs_off+0x70/0x100
[  115.020024][  T146]  ? _raw_spin_lock_irq+0xab/0xe0
[  115.025043][  T146]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  115.030412][  T146]  ? wq_worker_running+0x97/0x170
[  115.035426][  T146]  worker_thread+0xaa8/0x12a0
[  115.040137][  T146]  kthread+0x436/0x520
[  115.044207][  T146]  ? rcu_lock_release+0x20/0x20
[  115.049051][  T146]  ? kthread_blkcg+0xd0/0xd0
[  115.053633][  T146]  ret_from_fork+0x1f/0x30
[  115.058062][  T146]  </TASK>
[  115.061073][ T4296] CPU: 0 PID: 4296 Comm: kworker/u5:5 Not tainted syzkaller #0
[  115.068615][ T4296] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  115.078667][ T4296] Workqueue: hci3 hci_rx_work
[  115.083349][ T4296] Call Trace:
[  115.086635][ T4296]  <TASK>
[  115.089566][ T4296]  dump_stack_lvl+0x168/0x230
[  115.094250][ T4296]  ? show_regs_print_info+0x20/0x20
[  115.099454][ T4296]  ? load_image+0x3b0/0x3b0
[  115.104009][ T4296]  sysfs_create_dir_ns+0x252/0x280
[  115.105288][  T146] kobject_add_internal failed for hci4:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  115.109119][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  115.109145][ T4296]  ? sysfs_warn_dup+0xa0/0xa0
[  115.130011][  T146] Bluetooth: hci4: failed to register connection device
[  115.131973][ T4296]  ? le_conn_complete_evt+0xcbc/0x1590
[  115.131996][ T4296]  ? hci_event_packet+0xe05/0x12f0
[  115.132016][ T4296]  ? process_one_work+0x863/0x1000
[  115.132037][ T4296]  ? do_raw_spin_unlock+0x11d/0x230
[  115.159748][ T4296]  kobject_add_internal+0x662/0xd00
[  115.164955][ T4296]  kobject_add+0x152/0x210
[  115.169379][ T4296]  ? kobject_init+0x1d0/0x1d0
[  115.174065][ T4296]  ? klist_children_get+0x50/0x50
[  115.179091][ T4296]  ? get_device_parent+0x121/0x3f0
[  115.184207][ T4296]  device_add+0x483/0xfb0
[  115.188552][ T4296]  hci_conn_add_sysfs+0xd1/0x1e0
[  115.193496][ T4296]  le_conn_complete_evt+0xcbc/0x1590
[  115.198796][ T4296]  ? cs_le_create_conn+0x5e0/0x5e0
[  115.203917][ T4296]  ? __mutex_trylock_common+0x14f/0x250
[  115.209483][ T4296]  hci_le_meta_evt+0x289/0x3b80
[  115.214340][ T4296]  ? hci_event_packet+0x36d/0x12f0
[  115.215081][  T146] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:201'
[  115.219452][ T4296]  ? hci_event_packet+0x2e2/0x12f0
[  115.219482][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  115.239015][ T4296]  ? hci_remote_host_features_evt+0x280/0x280
[  115.245072][ T4296]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  115.250723][ T4296]  ? mark_lock+0x94/0x320
[  115.255042][ T4296]  ? mutex_unlock+0x10/0x10
[  115.259546][ T4296]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  115.265524][ T4296]  ? lock_chain_count+0x20/0x20
[  115.270370][ T4296]  ? __rwlock_init+0x140/0x140
[  115.275133][ T4296]  hci_event_packet+0xe05/0x12f0
[  115.280062][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  115.285256][ T4296]  ? rcu_lock_release+0x20/0x20
[  115.290102][ T4296]  ? hci_send_to_monitor+0x9c/0x4a0
[  115.295294][ T4296]  hci_rx_work+0x255/0xa10
[  115.299709][ T4296]  process_one_work+0x863/0x1000
[  115.304651][ T4296]  ? worker_detach_from_pool+0x240/0x240
[  115.310274][ T4296]  ? lockdep_hardirqs_off+0x70/0x100
[  115.315550][ T4296]  ? _raw_spin_lock_irq+0xab/0xe0
[  115.320562][ T4296]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  115.325922][ T4296]  ? wq_worker_running+0x97/0x170
[  115.330937][ T4296]  worker_thread+0xaa8/0x12a0
[  115.335600][ T4296]  ? _raw_spin_unlock_irqrestore+0x82/0x100
[  115.341481][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  115.346675][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  115.351861][ T4296]  ? _raw_spin_unlock_irqrestore+0xaa/0x100
[  115.357746][ T4296]  kthread+0x436/0x520
[  115.361800][ T4296]  ? rcu_lock_release+0x20/0x20
[  115.366640][ T4296]  ? kthread_blkcg+0xd0/0xd0
[  115.371225][ T4296]  ret_from_fork+0x1f/0x30
[  115.375644][ T4296]  </TASK>
[  115.378649][  T146] CPU: 1 PID: 146 Comm: kworker/u5:0 Not tainted syzkaller #0
[  115.382232][ T1324] Bluetooth: hci2: command 0x0406 tx timeout
[  115.386099][  T146] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  115.392218][ T4296] kobject_add_internal failed for hci3:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  115.402097][  T146] Workqueue: hci1 hci_rx_work
[  115.402119][  T146] Call Trace:
[  115.402127][  T146]  <TASK>
[  115.415367][ T4296] Bluetooth: hci3: failed to register connection device
[  115.419931][  T146]  dump_stack_lvl+0x168/0x230
[  115.437670][  T146]  ? show_regs_print_info+0x20/0x20
[  115.442876][  T146]  ? load_image+0x3b0/0x3b0
[  115.447396][  T146]  sysfs_create_dir_ns+0x252/0x280
[  115.452508][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  115.457536][  T146]  ? sysfs_warn_dup+0xa0/0xa0
[  115.462214][  T146]  ? le_conn_complete_evt+0xcbc/0x1590
[  115.467675][  T146]  ? hci_event_packet+0xe05/0x12f0
[  115.472789][  T146]  ? process_one_work+0x863/0x1000
[  115.477905][  T146]  ? do_raw_spin_unlock+0x11d/0x230
[  115.483108][  T146]  kobject_add_internal+0x662/0xd00
[  115.488319][  T146]  kobject_add+0x152/0x210
[  115.492741][  T146]  ? kobject_init+0x1d0/0x1d0
[  115.497427][  T146]  ? klist_children_get+0x50/0x50
[  115.502454][  T146]  ? get_device_parent+0x121/0x3f0
[  115.507579][  T146]  device_add+0x483/0xfb0
[  115.511922][  T146]  hci_conn_add_sysfs+0xd1/0x1e0
[  115.516870][  T146]  le_conn_complete_evt+0xcbc/0x1590
[  115.522173][  T146]  ? cs_le_create_conn+0x5e0/0x5e0
[  115.527299][  T146]  ? __mutex_trylock_common+0x14f/0x250
[  115.532855][  T146]  hci_le_meta_evt+0x289/0x3b80
[  115.537714][  T146]  ? hci_event_packet+0x36d/0x12f0
[  115.542832][  T146]  ? hci_event_packet+0x2e2/0x12f0
[  115.547945][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  115.552983][  T146]  ? hci_remote_host_features_evt+0x280/0x280
[  115.559051][  T146]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  115.564688][  T146]  ? mark_lock+0x94/0x320
[  115.569020][  T146]  ? mutex_unlock+0x10/0x10
[  115.573526][  T146]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  115.579512][  T146]  ? lock_chain_count+0x20/0x20
[  115.584365][  T146]  ? __rwlock_init+0x140/0x140
[  115.589133][  T146]  hci_event_packet+0xe05/0x12f0
[  115.594082][  T146]  ? lockdep_hardirqs_on+0x94/0x140
[  115.599288][  T146]  ? rcu_lock_release+0x20/0x20
[  115.604151][  T146]  ? hci_send_to_monitor+0x9c/0x4a0
[  115.609354][  T146]  hci_rx_work+0x255/0xa10
[  115.613760][  T146]  process_one_work+0x863/0x1000
[  115.618683][  T146]  ? worker_detach_from_pool+0x240/0x240
[  115.624296][  T146]  ? lockdep_hardirqs_off+0x70/0x100
[  115.629587][  T146]  ? _raw_spin_lock_irq+0xab/0xe0
[  115.634610][  T146]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  115.639983][  T146]  ? wq_worker_running+0x97/0x170
[  115.645010][  T146]  worker_thread+0xaa8/0x12a0
[  115.649718][  T146]  kthread+0x436/0x520
[  115.653786][  T146]  ? rcu_lock_release+0x20/0x20
[  115.658638][  T146]  ? kthread_blkcg+0xd0/0xd0
[  115.663230][  T146]  ret_from_fork+0x1f/0x30
[  115.667665][  T146]  </TASK>
[  115.684292][  T146] kobject_add_internal failed for hci1:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  115.697561][  T146] Bluetooth: hci1: failed to register connection device
[  115.742668][  T146] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:201'
[  115.752302][  T146] CPU: 1 PID: 146 Comm: kworker/u5:0 Not tainted syzkaller #0
[  115.759759][  T146] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  115.769810][  T146] Workqueue: hci3 hci_rx_work
[  115.774494][  T146] Call Trace:
[  115.777784][  T146]  <TASK>
[  115.780714][  T146]  dump_stack_lvl+0x168/0x230
[  115.785398][  T146]  ? show_regs_print_info+0x20/0x20
[  115.790602][  T146]  ? load_image+0x3b0/0x3b0
[  115.795122][  T146]  sysfs_create_dir_ns+0x252/0x280
[  115.800253][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  115.805282][  T146]  ? sysfs_warn_dup+0xa0/0xa0
[  115.809972][  T146]  ? le_conn_complete_evt+0xcbc/0x1590
[  115.815442][  T146]  ? hci_event_packet+0xe05/0x12f0
[  115.820572][  T146]  ? process_one_work+0x863/0x1000
[  115.825687][  T146]  ? do_raw_spin_unlock+0x11d/0x230
[  115.830894][  T146]  kobject_add_internal+0x662/0xd00
[  115.836101][  T146]  kobject_add+0x152/0x210
[  115.840535][  T146]  ? kobject_init+0x1d0/0x1d0
[  115.845216][  T146]  ? klist_children_get+0x50/0x50
[  115.850251][  T146]  ? get_device_parent+0x121/0x3f0
[  115.855372][  T146]  device_add+0x483/0xfb0
[  115.859717][  T146]  hci_conn_add_sysfs+0xd1/0x1e0
[  115.864664][  T146]  le_conn_complete_evt+0xcbc/0x1590
[  115.869964][  T146]  ? cs_le_create_conn+0x5e0/0x5e0
[  115.875084][  T146]  ? __mutex_trylock_common+0x14f/0x250
[  115.880638][  T146]  hci_le_meta_evt+0x289/0x3b80
[  115.885489][  T146]  ? hci_event_packet+0x36d/0x12f0
[  115.890600][  T146]  ? hci_event_packet+0x2e2/0x12f0
[  115.895695][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  115.900711][  T146]  ? hci_remote_host_features_evt+0x280/0x280
[  115.906756][  T146]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  115.912374][  T146]  ? mark_lock+0x94/0x320
[  115.916701][  T146]  ? mutex_unlock+0x10/0x10
[  115.921191][  T146]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  115.927155][  T146]  ? lock_chain_count+0x20/0x20
[  115.931983][  T146]  ? __rwlock_init+0x140/0x140
[  115.936734][  T146]  hci_event_packet+0xe05/0x12f0
[  115.941683][  T146]  ? lockdep_hardirqs_on+0x94/0x140
[  115.946890][  T146]  ? rcu_lock_release+0x20/0x20
[  115.951747][  T146]  ? hci_send_to_monitor+0x9c/0x4a0
[  115.956950][  T146]  hci_rx_work+0x255/0xa10
[  115.961383][  T146]  process_one_work+0x863/0x1000
[  115.961814][ T4230] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:201'
[  115.966333][  T146]  ? worker_detach_from_pool+0x240/0x240
[  115.981400][  T146]  ? lockdep_hardirqs_off+0x70/0x100
[  115.986687][  T146]  ? _raw_spin_lock_irq+0xab/0xe0
[  115.991701][  T146]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  115.997063][  T146]  ? wq_worker_running+0x97/0x170
[  116.002081][  T146]  worker_thread+0xaa8/0x12a0
[  116.006771][  T146]  kthread+0x436/0x520
[  116.010827][  T146]  ? rcu_lock_release+0x20/0x20
[  116.015673][  T146]  ? kthread_blkcg+0xd0/0xd0
[  116.020255][  T146]  ret_from_fork+0x1f/0x30
[  116.024671][  T146]  </TASK>
[  116.027673][ T4230] CPU: 0 PID: 4230 Comm: kworker/u5:2 Not tainted syzkaller #0
[  116.035215][ T4230] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  116.045264][ T4230] Workqueue: hci1 hci_rx_work
[  116.049945][ T4230] Call Trace:
[  116.053220][ T4230]  <TASK>
[  116.056157][ T4230]  dump_stack_lvl+0x168/0x230
[  116.060849][ T4230]  ? show_regs_print_info+0x20/0x20
[  116.066052][ T4230]  ? load_image+0x3b0/0x3b0
[  116.070585][ T4230]  sysfs_create_dir_ns+0x252/0x280
[  116.075697][ T4230]  ? __lock_acquire+0x7c60/0x7c60
[  116.080410][ T4296] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:201'
[  116.080712][ T4230]  ? sysfs_warn_dup+0xa0/0xa0
[  116.094799][ T4230]  ? le_conn_complete_evt+0xcbc/0x1590
[  116.100260][ T4230]  ? hci_event_packet+0xe05/0x12f0
[  116.105379][ T4230]  ? process_one_work+0x863/0x1000
[  116.110491][ T4230]  ? do_raw_spin_unlock+0x11d/0x230
[  116.115693][ T4230]  kobject_add_internal+0x662/0xd00
[  116.120886][ T4230]  kobject_add+0x152/0x210
[  116.125296][ T4230]  ? kobject_init+0x1d0/0x1d0
[  116.129962][ T4230]  ? klist_children_get+0x50/0x50
[  116.134976][ T4230]  ? get_device_parent+0x121/0x3f0
[  116.140093][ T4230]  device_add+0x483/0xfb0
[  116.144431][ T4230]  hci_conn_add_sysfs+0xd1/0x1e0
[  116.149374][ T4230]  le_conn_complete_evt+0xcbc/0x1590
[  116.154674][ T4230]  ? cs_le_create_conn+0x5e0/0x5e0
[  116.159789][ T4230]  ? __mutex_trylock_common+0x14f/0x250
[  116.165336][ T4230]  hci_le_meta_evt+0x289/0x3b80
[  116.170180][ T4230]  ? hci_event_packet+0x36d/0x12f0
[  116.175287][ T4230]  ? hci_event_packet+0x2e2/0x12f0
[  116.180395][ T4230]  ? __lock_acquire+0x7c60/0x7c60
[  116.185423][ T4230]  ? hci_remote_host_features_evt+0x280/0x280
[  116.191478][ T4230]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  116.197100][ T4230]  ? mark_lock+0x94/0x320
[  116.201417][ T4230]  ? mutex_unlock+0x10/0x10
[  116.205910][ T4230]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  116.211880][ T4230]  ? lock_chain_count+0x20/0x20
[  116.216718][ T4230]  ? __rwlock_init+0x140/0x140
[  116.221469][ T4230]  hci_event_packet+0xe05/0x12f0
[  116.226396][ T4230]  ? lockdep_hardirqs_on+0x94/0x140
[  116.231586][ T4230]  ? rcu_lock_release+0x20/0x20
[  116.236431][ T4230]  ? hci_send_to_monitor+0x9c/0x4a0
[  116.241616][ T4230]  hci_rx_work+0x255/0xa10
[  116.246031][ T4230]  process_one_work+0x863/0x1000
[  116.250981][ T4230]  ? worker_detach_from_pool+0x240/0x240
[  116.256600][ T4230]  ? lockdep_hardirqs_off+0x70/0x100
[  116.261877][ T4230]  ? _raw_spin_lock_irq+0xab/0xe0
[  116.266886][ T4230]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  116.272243][ T4230]  ? wq_worker_running+0x97/0x170
[  116.277254][ T4230]  worker_thread+0xaa8/0x12a0
[  116.281916][ T4230]  ? _raw_spin_unlock_irqrestore+0x82/0x100
[  116.287795][ T4230]  ? lockdep_hardirqs_on+0x94/0x140
[  116.292989][ T4230]  ? lockdep_hardirqs_on+0x94/0x140
[  116.298175][ T4230]  ? _raw_spin_unlock_irqrestore+0xaa/0x100
[  116.304061][ T4230]  kthread+0x436/0x520
[  116.308116][ T4230]  ? rcu_lock_release+0x20/0x20
[  116.312954][ T4230]  ? kthread_blkcg+0xd0/0xd0
[  116.317530][ T4230]  ret_from_fork+0x1f/0x30
[  116.321945][ T4230]  </TASK>
[  116.324950][ T4296] CPU: 1 PID: 4296 Comm: kworker/u5:5 Not tainted syzkaller #0
[  116.332468][ T1324] Bluetooth: hci4: command 0x0406 tx timeout
[  116.332494][ T4296] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  116.343576][ T4230] kobject_add_internal failed for hci1:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  116.348486][ T4296] Workqueue: hci4 hci_rx_work
[  116.361815][ T4230] Bluetooth: hci1: failed to register connection device
[  116.366293][ T4296] Call Trace:
[  116.366302][ T4296]  <TASK>
[  116.379386][ T4296]  dump_stack_lvl+0x168/0x230
[  116.384069][ T4296]  ? show_regs_print_info+0x20/0x20
[  116.389277][ T4296]  ? load_image+0x3b0/0x3b0
[  116.393795][ T4296]  sysfs_create_dir_ns+0x252/0x280
[  116.398914][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  116.403946][ T4296]  ? sysfs_warn_dup+0xa0/0xa0
[  116.408623][ T4296]  ? le_conn_complete_evt+0xcbc/0x1590
[  116.414082][ T4296]  ? hci_event_packet+0xe05/0x12f0
[  116.419202][ T4296]  ? process_one_work+0x863/0x1000
[  116.424319][ T4296]  ? do_raw_spin_unlock+0x11d/0x230
[  116.429526][ T4296]  kobject_add_internal+0x662/0xd00
[  116.434736][ T4296]  kobject_add+0x152/0x210
[  116.439160][ T4296]  ? kobject_init+0x1d0/0x1d0
[  116.443837][ T4296]  ? klist_children_get+0x50/0x50
[  116.448848][ T4296]  ? get_device_parent+0x121/0x3f0
[  116.453969][ T4296]  device_add+0x483/0xfb0
[  116.458314][ T4296]  hci_conn_add_sysfs+0xd1/0x1e0
[  116.463259][ T4296]  le_conn_complete_evt+0xcbc/0x1590
[  116.468551][ T4296]  ? cs_le_create_conn+0x5e0/0x5e0
[  116.473664][ T4296]  ? __mutex_trylock_common+0x14f/0x250
[  116.479221][ T4296]  hci_le_meta_evt+0x289/0x3b80
[  116.484074][ T4296]  ? hci_event_packet+0x36d/0x12f0
[  116.489194][ T4296]  ? hci_event_packet+0x2e2/0x12f0
[  116.494307][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  116.499347][ T4296]  ? hci_remote_host_features_evt+0x280/0x280
[  116.504797][  T146] kobject_add_internal failed for hci3:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  116.505411][ T4296]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  116.505437][ T4296]  ? mark_lock+0x94/0x320
[  116.518823][  T146] Bluetooth: hci3: failed to register connection device
[  116.524198][ T4296]  ? mutex_unlock+0x10/0x10
[  116.524220][ T4296]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  116.524244][ T4296]  ? lock_chain_count+0x20/0x20
[  116.550678][ T4296]  ? __rwlock_init+0x140/0x140
[  116.555422][ T4296]  hci_event_packet+0xe05/0x12f0
[  116.560339][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  116.565520][ T4296]  ? rcu_lock_release+0x20/0x20
[  116.570354][ T4296]  ? hci_send_to_monitor+0x9c/0x4a0
[  116.575533][ T4296]  hci_rx_work+0x255/0xa10
[  116.579932][ T4296]  process_one_work+0x863/0x1000
[  116.584868][ T4296]  ? worker_detach_from_pool+0x240/0x240
[  116.590519][ T4296]  ? lockdep_hardirqs_off+0x70/0x100
[  116.595804][ T4296]  ? _raw_spin_lock_irq+0xab/0xe0
[  116.600810][ T4296]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  116.606174][ T4296]  ? wq_worker_running+0x97/0x170
[  116.611175][ T4296]  worker_thread+0xaa8/0x12a0
[  116.615826][ T4296]  ? _raw_spin_unlock_irqrestore+0x82/0x100
[  116.621692][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  116.626869][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  116.632046][ T4296]  ? _raw_spin_unlock_irqrestore+0xaa/0x100
[  116.637951][ T4296]  kthread+0x436/0x520
[  116.642004][ T4296]  ? rcu_lock_release+0x20/0x20
[  116.646831][ T4296]  ? kthread_blkcg+0xd0/0xd0
[  116.651404][ T4296]  ret_from_fork+0x1f/0x30
[  116.655815][ T4296]  </TASK>
[  116.677514][ T4296] kobject_add_internal failed for hci4:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  116.690986][ T4296] Bluetooth: hci4: failed to register connection device
2025/11/27 04:45:27 executed programs: 248
[  116.778638][ T4296] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:201'
[  116.788441][ T4296] CPU: 0 PID: 4296 Comm: kworker/u5:5 Not tainted syzkaller #0
[  116.795987][ T4296] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  116.806028][  T146] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:201'
[  116.806041][ T4296] Workqueue: hci1 hci_rx_work
[  116.820145][ T4296] Call Trace:
[  116.823412][ T4296]  <TASK>
[  116.826329][ T4296]  dump_stack_lvl+0x168/0x230
[  116.831005][ T4296]  ? show_regs_print_info+0x20/0x20
[  116.836223][ T4296]  ? load_image+0x3b0/0x3b0
[  116.840747][ T4296]  sysfs_create_dir_ns+0x252/0x280
[  116.845875][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  116.850901][ T4296]  ? sysfs_warn_dup+0xa0/0xa0
[  116.855578][ T4296]  ? le_conn_complete_evt+0xcbc/0x1590
[  116.861037][ T4296]  ? hci_event_packet+0xe05/0x12f0
[  116.866148][ T4296]  ? process_one_work+0x863/0x1000
[  116.871251][ T4296]  ? do_raw_spin_unlock+0x11d/0x230
[  116.876444][ T4296]  kobject_add_internal+0x662/0xd00
[  116.881636][ T4296]  kobject_add+0x152/0x210
[  116.886043][ T4296]  ? kobject_init+0x1d0/0x1d0
[  116.890717][ T4296]  ? klist_children_get+0x50/0x50
[  116.895738][ T4296]  ? get_device_parent+0x121/0x3f0
[  116.900844][ T4296]  device_add+0x483/0xfb0
[  116.905179][ T4296]  hci_conn_add_sysfs+0xd1/0x1e0
[  116.910112][ T4296]  le_conn_complete_evt+0xcbc/0x1590
[  116.915400][ T4296]  ? cs_le_create_conn+0x5e0/0x5e0
[  116.920506][ T4296]  ? __mutex_trylock_common+0x14f/0x250
[  116.926054][ T4296]  hci_le_meta_evt+0x289/0x3b80
[  116.930895][ T4296]  ? hci_event_packet+0x36d/0x12f0
[  116.935995][ T4296]  ? hci_event_packet+0x2e2/0x12f0
[  116.941095][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  116.946117][ T4296]  ? hci_remote_host_features_evt+0x280/0x280
[  116.952173][ T4296]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  116.957796][ T4296]  ? mark_lock+0x94/0x320
[  116.962114][ T4296]  ? mutex_unlock+0x10/0x10
[  116.966611][ T4296]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  116.972581][ T4296]  ? lock_chain_count+0x20/0x20
[  116.977420][ T4296]  ? __rwlock_init+0x140/0x140
[  116.982176][ T4296]  hci_event_packet+0xe05/0x12f0
[  116.987102][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  116.992297][ T4296]  ? rcu_lock_release+0x20/0x20
[  116.997141][ T4296]  ? hci_send_to_monitor+0x9c/0x4a0
[  117.002336][ T4296]  hci_rx_work+0x255/0xa10
[  117.006758][ T4296]  process_one_work+0x863/0x1000
[  117.011699][ T4296]  ? worker_detach_from_pool+0x240/0x240
[  117.017335][ T4296]  ? lockdep_hardirqs_off+0x70/0x100
[  117.022609][ T4296]  ? _raw_spin_lock_irq+0xab/0xe0
[  117.027619][ T4296]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  117.033000][ T4296]  ? wq_worker_running+0x97/0x170
[  117.038026][ T4296]  worker_thread+0xaa8/0x12a0
[  117.042689][ T4296]  ? _raw_spin_unlock_irqrestore+0x82/0x100
[  117.048604][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  117.053803][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  117.058991][ T4296]  ? _raw_spin_unlock_irqrestore+0xaa/0x100
[  117.064883][ T4296]  kthread+0x436/0x520
[  117.068937][ T4296]  ? rcu_lock_release+0x20/0x20
[  117.073776][ T4296]  ? kthread_blkcg+0xd0/0xd0
[  117.078355][ T4296]  ret_from_fork+0x1f/0x30
[  117.082771][ T4296]  </TASK>
[  117.085785][  T146] CPU: 1 PID: 146 Comm: kworker/u5:0 Not tainted syzkaller #0
[  117.089428][    T7] Bluetooth: hci0: command 0x0406 tx timeout
[  117.093239][  T146] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  117.093252][  T146] Workqueue: hci3 hci_rx_work
[  117.093272][  T146] Call Trace:
[  117.093278][  T146]  <TASK>
[  117.093285][  T146]  dump_stack_lvl+0x168/0x230
[  117.093310][  T146]  ? show_regs_print_info+0x20/0x20
[  117.093330][  T146]  ? load_image+0x3b0/0x3b0
[  117.093361][  T146]  sysfs_create_dir_ns+0x252/0x280
[  117.093382][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  117.101362][ T4296] kobject_add_internal failed for hci1:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  117.109381][  T146]  ? sysfs_warn_dup+0xa0/0xa0
[  117.109403][  T146]  ? le_conn_complete_evt+0xcbc/0x1590
[  117.109422][  T146]  ? hci_event_packet+0xe05/0x12f0
[  117.109441][  T146]  ? process_one_work+0x863/0x1000
[  117.109461][  T146]  ? do_raw_spin_unlock+0x11d/0x230
[  117.109483][  T146]  kobject_add_internal+0x662/0xd00
[  117.109510][  T146]  kobject_add+0x152/0x210
[  117.109533][  T146]  ? kobject_init+0x1d0/0x1d0
[  117.109556][  T146]  ? klist_children_get+0x50/0x50
[  117.109574][  T146]  ? get_device_parent+0x121/0x3f0
[  117.109597][  T146]  device_add+0x483/0xfb0
[  117.114375][ T4296] Bluetooth: hci1: failed to register connection device
[  117.117520][  T146]  hci_conn_add_sysfs+0xd1/0x1e0
[  117.123303][    T7] Bluetooth: hci1: command 0x0406 tx timeout
[  117.125081][  T146]  le_conn_complete_evt+0xcbc/0x1590
[  117.125114][  T146]  ? cs_le_create_conn+0x5e0/0x5e0
[  117.130716][    T7] Bluetooth: hci3: command 0x0406 tx timeout
[  117.134757][  T146]  ? __mutex_trylock_common+0x14f/0x250
[  117.251592][  T146]  hci_le_meta_evt+0x289/0x3b80
[  117.256424][  T146]  ? hci_event_packet+0x36d/0x12f0
[  117.261511][  T146]  ? hci_event_packet+0x2e2/0x12f0
[  117.266600][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  117.271610][  T146]  ? hci_remote_host_features_evt+0x280/0x280
[  117.277659][  T146]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  117.283295][  T146]  ? mark_lock+0x94/0x320
[  117.287620][  T146]  ? mutex_unlock+0x10/0x10
[  117.292104][  T146]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  117.298061][  T146]  ? lock_chain_count+0x20/0x20
[  117.302890][  T146]  ? __rwlock_init+0x140/0x140
[  117.307631][  T146]  hci_event_packet+0xe05/0x12f0
[  117.312548][  T146]  ? lockdep_hardirqs_on+0x94/0x140
[  117.317724][  T146]  ? rcu_lock_release+0x20/0x20
[  117.322556][  T146]  ? hci_send_to_monitor+0x9c/0x4a0
[  117.327730][  T146]  hci_rx_work+0x255/0xa10
[  117.332142][  T146]  process_one_work+0x863/0x1000
[  117.333518][ T4296] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:201'
[  117.337098][  T146]  ? worker_detach_from_pool+0x240/0x240
[  117.337120][  T146]  ? lockdep_hardirqs_off+0x70/0x100
[  117.337143][  T146]  ? _raw_spin_lock_irq+0xab/0xe0
[  117.362445][  T146]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  117.367806][  T146]  ? wq_worker_running+0x97/0x170
[  117.372818][  T146]  worker_thread+0xaa8/0x12a0
[  117.377510][  T146]  kthread+0x436/0x520
[  117.381568][  T146]  ? rcu_lock_release+0x20/0x20
[  117.386418][  T146]  ? kthread_blkcg+0xd0/0xd0
[  117.391034][  T146]  ret_from_fork+0x1f/0x30
[  117.395452][  T146]  </TASK>
[  117.398591][ T4296] CPU: 0 PID: 4296 Comm: kworker/u5:5 Not tainted syzkaller #0
[  117.406152][ T4296] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  117.416204][ T4296] Workqueue: hci1 hci_rx_work
[  117.420890][ T4296] Call Trace:
[  117.424176][ T4296]  <TASK>
[  117.427109][ T4296]  dump_stack_lvl+0x168/0x230
[  117.431792][ T4296]  ? show_regs_print_info+0x20/0x20
[  117.436994][ T4296]  ? load_image+0x3b0/0x3b0
[  117.441516][ T4296]  sysfs_create_dir_ns+0x252/0x280
[  117.446632][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  117.451661][ T4296]  ? sysfs_warn_dup+0xa0/0xa0
[  117.456336][ T4296]  ? le_conn_complete_evt+0xcbc/0x1590
[  117.461795][ T4296]  ? hci_event_packet+0xe05/0x12f0
[  117.466907][ T4296]  ? process_one_work+0x863/0x1000
[  117.472018][ T4296]  ? do_raw_spin_unlock+0x11d/0x230
[  117.477223][ T4296]  kobject_add_internal+0x662/0xd00
[  117.482435][ T4296]  kobject_add+0x152/0x210
[  117.486859][ T4296]  ? kobject_init+0x1d0/0x1d0
[  117.491543][ T4296]  ? klist_children_get+0x50/0x50
[  117.496570][ T4296]  ? get_device_parent+0x121/0x3f0
[  117.501690][ T4296]  device_add+0x483/0xfb0
[  117.506030][ T4296]  hci_conn_add_sysfs+0xd1/0x1e0
[  117.510980][ T4296]  le_conn_complete_evt+0xcbc/0x1590
[  117.516278][ T4296]  ? cs_le_create_conn+0x5e0/0x5e0
[  117.521402][ T4296]  ? __mutex_trylock_common+0x14f/0x250
[  117.526957][ T4296]  hci_le_meta_evt+0x289/0x3b80
[  117.531822][ T4296]  ? hci_event_packet+0x36d/0x12f0
[  117.536945][ T4296]  ? hci_event_packet+0x2e2/0x12f0
[  117.542060][ T4296]  ? __lock_acquire+0x7c60/0x7c60
[  117.545549][  T146] kobject_add_internal failed for hci3:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  117.547094][ T4296]  ? hci_remote_host_features_evt+0x280/0x280
[  117.560527][  T146] Bluetooth: hci3: failed to register connection device
[  117.566290][ T4296]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  117.578822][ T4296]  ? mark_lock+0x94/0x320
[  117.583156][ T4296]  ? mutex_unlock+0x10/0x10
[  117.584116][  T146] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:201'
[  117.587659][ T4296]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  117.587686][ T4296]  ? lock_chain_count+0x20/0x20
[  117.607915][ T4296]  ? __rwlock_init+0x140/0x140
[  117.612683][ T4296]  hci_event_packet+0xe05/0x12f0
[  117.617627][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  117.622840][ T4296]  ? rcu_lock_release+0x20/0x20
[  117.627699][ T4296]  ? hci_send_to_monitor+0x9c/0x4a0
[  117.632910][ T4296]  hci_rx_work+0x255/0xa10
[  117.637335][ T4296]  process_one_work+0x863/0x1000
[  117.642289][ T4296]  ? worker_detach_from_pool+0x240/0x240
[  117.647931][ T4296]  ? lockdep_hardirqs_off+0x70/0x100
[  117.653224][ T4296]  ? _raw_spin_lock_irq+0xab/0xe0
[  117.658263][ T4296]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  117.663628][ T4296]  ? wq_worker_running+0x97/0x170
[  117.668642][ T4296]  worker_thread+0xaa8/0x12a0
[  117.673309][ T4296]  ? _raw_spin_unlock_irqrestore+0x82/0x100
[  117.679199][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  117.684399][ T4296]  ? lockdep_hardirqs_on+0x94/0x140
[  117.689593][ T4296]  ? _raw_spin_unlock_irqrestore+0xaa/0x100
[  117.695485][ T4296]  kthread+0x436/0x520
[  117.699540][ T4296]  ? rcu_lock_release+0x20/0x20
[  117.704383][ T4296]  ? kthread_blkcg+0xd0/0xd0
[  117.708972][ T4296]  ret_from_fork+0x1f/0x30
[  117.713398][ T4296]  </TASK>
[  117.718419][  T146] CPU: 1 PID: 146 Comm: kworker/u5:0 Not tainted syzkaller #0
[  117.722604][ T1324] Bluetooth: hci2: command 0x0406 tx timeout
[  117.725879][  T146] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  117.731980][ T4296] kobject_add_internal failed for hci1:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  117.741866][  T146] Workqueue: hci4 hci_rx_work
[  117.741890][  T146] Call Trace:
[  117.741898][  T146]  <TASK>
[  117.755139][ T4296] Bluetooth: hci1: failed to register connection device
[  117.759696][  T146]  dump_stack_lvl+0x168/0x230
[  117.777432][  T146]  ? show_regs_print_info+0x20/0x20
[  117.782638][  T146]  ? load_image+0x3b0/0x3b0
[  117.787157][  T146]  sysfs_create_dir_ns+0x252/0x280
[  117.792271][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  117.797305][  T146]  ? sysfs_warn_dup+0xa0/0xa0
[  117.801988][  T146]  ? le_conn_complete_evt+0xcbc/0x1590
[  117.807450][  T146]  ? hci_event_packet+0xe05/0x12f0
[  117.812566][  T146]  ? process_one_work+0x863/0x1000
[  117.817680][  T146]  ? do_raw_spin_unlock+0x11d/0x230
[  117.822895][  T146]  kobject_add_internal+0x662/0xd00
[  117.828107][  T146]  kobject_add+0x152/0x210
[  117.832522][  T146]  ? kobject_init+0x1d0/0x1d0
[  117.837199][  T146]  ? klist_children_get+0x50/0x50
[  117.842216][  T146]  ? get_device_parent+0x121/0x3f0
[  117.847307][  T146]  device_add+0x483/0xfb0
[  117.851636][  T146]  hci_conn_add_sysfs+0xd1/0x1e0
[  117.856561][  T146]  le_conn_complete_evt+0xcbc/0x1590
[  117.861848][  T146]  ? cs_le_create_conn+0x5e0/0x5e0
[  117.866973][  T146]  ? __mutex_trylock_common+0x14f/0x250
[  117.872525][  T146]  hci_le_meta_evt+0x289/0x3b80
[  117.877378][  T146]  ? hci_event_packet+0x36d/0x12f0
[  117.882469][  T146]  ? hci_event_packet+0x2e2/0x12f0
[  117.887558][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  117.892591][  T146]  ? hci_remote_host_features_evt+0x280/0x280
[  117.898660][  T146]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  117.904295][  T146]  ? mark_lock+0x94/0x320
[  117.908617][  T146]  ? mutex_unlock+0x10/0x10
[  117.913123][  T146]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  117.919117][  T146]  ? lock_chain_count+0x20/0x20
[  117.923968][  T146]  ? __rwlock_init+0x140/0x140
[  117.928737][  T146]  hci_event_packet+0xe05/0x12f0
[  117.933684][  T146]  ? lockdep_hardirqs_on+0x94/0x140
[  117.938867][  T146]  ? rcu_lock_release+0x20/0x20
[  117.943707][  T146]  ? hci_send_to_monitor+0x9c/0x4a0
[  117.948895][  T146]  hci_rx_work+0x255/0xa10
[  117.953309][  T146]  process_one_work+0x863/0x1000
[  117.958241][  T146]  ? worker_detach_from_pool+0x240/0x240
[  117.963858][  T146]  ? lockdep_hardirqs_off+0x70/0x100
[  117.969155][  T146]  ? _raw_spin_lock_irq+0xab/0xe0
[  117.974167][  T146]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  117.979515][  T146]  ? wq_worker_running+0x97/0x170
[  117.984514][  T146]  worker_thread+0xaa8/0x12a0
[  117.989181][  T146]  kthread+0x436/0x520
[  117.993224][  T146]  ? rcu_lock_release+0x20/0x20
[  117.998050][  T146]  ? kthread_blkcg+0xd0/0xd0
[  118.002618][  T146]  ret_from_fork+0x1f/0x30
[  118.007018][  T146]  </TASK>
[  118.036293][  T146] kobject_add_internal failed for hci4:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  118.049539][  T146] Bluetooth: hci4: failed to register connection device
[  118.141278][  T146] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:201'
[  118.151110][  T146] CPU: 1 PID: 146 Comm: kworker/u5:0 Not tainted syzkaller #0
[  118.158571][  T146] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  118.168628][  T146] Workqueue: hci3 hci_rx_work
[  118.173307][  T146] Call Trace:
[  118.176566][  T146]  <TASK>
[  118.179475][  T146]  dump_stack_lvl+0x168/0x230
[  118.184144][  T146]  ? show_regs_print_info+0x20/0x20
[  118.189349][  T146]  ? load_image+0x3b0/0x3b0
[  118.193881][  T146]  sysfs_create_dir_ns+0x252/0x280
[  118.199006][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  118.204037][  T146]  ? sysfs_warn_dup+0xa0/0xa0
[  118.208716][  T146]  ? le_conn_complete_evt+0xcbc/0x1590
[  118.214177][  T146]  ? hci_event_packet+0xe05/0x12f0
[  118.219320][  T146]  ? process_one_work+0x863/0x1000
[  118.224412][  T146]  ? do_raw_spin_unlock+0x11d/0x230
[  118.229602][  T146]  kobject_add_internal+0x662/0xd00
[  118.234826][  T146]  kobject_add+0x152/0x210
[  118.239221][  T146]  ? kobject_init+0x1d0/0x1d0
[  118.243877][  T146]  ? klist_children_get+0x50/0x50
[  118.248887][  T146]  ? get_device_parent+0x121/0x3f0
[  118.253977][  T146]  device_add+0x483/0xfb0
[  118.258289][  T146]  hci_conn_add_sysfs+0xd1/0x1e0
[  118.263213][  T146]  le_conn_complete_evt+0xcbc/0x1590
[  118.268499][  T146]  ? cs_le_create_conn+0x5e0/0x5e0
[  118.273592][  T146]  ? __mutex_trylock_common+0x14f/0x250
[  118.279121][  T146]  hci_le_meta_evt+0x289/0x3b80
[  118.283948][  T146]  ? hci_event_packet+0x36d/0x12f0
[  118.289040][  T146]  ? hci_event_packet+0x2e2/0x12f0
[  118.294135][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  118.299152][  T146]  ? hci_remote_host_features_evt+0x280/0x280
[  118.305196][  T146]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  118.310820][  T146]  ? mark_lock+0x94/0x320
[  118.315156][  T146]  ? mutex_unlock+0x10/0x10
[  118.319661][  T146]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  118.325620][  T146]  ? lock_chain_count+0x20/0x20
[  118.330453][  T146]  ? __rwlock_init+0x140/0x140
[  118.335211][  T146]  hci_event_packet+0xe05/0x12f0
[  118.340132][  T146]  ? lockdep_hardirqs_on+0x94/0x140
[  118.345312][  T146]  ? rcu_lock_release+0x20/0x20
[  118.350147][  T146]  ? hci_send_to_monitor+0x9c/0x4a0
[  118.355326][  T146]  hci_rx_work+0x255/0xa10
[  118.359727][  T146]  process_one_work+0x863/0x1000
[  118.364659][  T146]  ? worker_detach_from_pool+0x240/0x240
[  118.370285][  T146]  ? lockdep_hardirqs_off+0x70/0x100
[  118.375552][  T146]  ? _raw_spin_lock_irq+0xab/0xe0
[  118.380555][  T146]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  118.385908][  T146]  ? wq_worker_running+0x97/0x170
[  118.390920][  T146]  worker_thread+0xaa8/0x12a0
[  118.395588][  T146]  kthread+0x436/0x520
[  118.399633][  T146]  ? rcu_lock_release+0x20/0x20
[  118.404458][  T146]  ? kthread_blkcg+0xd0/0xd0
[  118.409033][  T146]  ret_from_fork+0x1f/0x30
[  118.413447][  T146]  </TASK>
[  118.419010][T13830] cgroup: fork rejected by pids controller in /syz2
[  118.436027][ T4229] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:201'
[  118.455993][ T4229] CPU: 0 PID: 4229 Comm: kworker/u5:1 Not tainted syzkaller #0
[  118.463560][ T4229] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  118.473613][ T4229] Workqueue: hci1 hci_rx_work
[  118.478300][ T4229] Call Trace:
[  118.481579][ T4229]  <TASK>
[  118.484507][ T4229]  dump_stack_lvl+0x168/0x230
[  118.489192][ T4229]  ? show_regs_print_info+0x20/0x20
[  118.494394][ T4229]  ? load_image+0x3b0/0x3b0
[  118.498922][ T4229]  sysfs_create_dir_ns+0x252/0x280
[  118.504039][ T4229]  ? __lock_acquire+0x7c60/0x7c60
[  118.509079][ T4229]  ? sysfs_warn_dup+0xa0/0xa0
[  118.513757][ T4229]  ? le_conn_complete_evt+0xcbc/0x1590
[  118.519227][ T4229]  ? hci_event_packet+0xe05/0x12f0
[  118.524341][ T4229]  ? process_one_work+0x863/0x1000
[  118.529454][ T4229]  ? do_raw_spin_unlock+0x11d/0x230
[  118.534660][ T4229]  kobject_add_internal+0x662/0xd00
[  118.539876][ T4229]  kobject_add+0x152/0x210
[  118.544299][ T4229]  ? kobject_init+0x1d0/0x1d0
[  118.548980][ T4229]  ? klist_children_get+0x50/0x50
[  118.554001][ T4229]  ? get_device_parent+0x121/0x3f0
[  118.559112][ T4229]  device_add+0x483/0xfb0
[  118.563445][ T4229]  ? asm_sysvec_reschedule_ipi+0x16/0x20
[  118.565602][  T146] kobject_add_internal failed for hci3:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  118.569080][ T4229]  hci_conn_add_sysfs+0xd1/0x1e0
[  118.569108][ T4229]  le_conn_complete_evt+0xcbc/0x1590
[  118.582538][  T146] Bluetooth: hci3: failed to register connection device
[  118.587198][ T4229]  ? cs_le_create_conn+0x5e0/0x5e0
[  118.604459][ T4229]  ? __mutex_trylock_common+0x14f/0x250
[  118.610009][ T4229]  hci_le_meta_evt+0x289/0x3b80
[  118.614842][ T4229]  ? hci_event_packet+0x36d/0x12f0
[  118.619933][ T4229]  ? hci_event_packet+0x2e2/0x12f0
[  118.625021][ T4229]  ? __lock_acquire+0x7c60/0x7c60
[  118.630040][ T4229]  ? hci_remote_host_features_evt+0x280/0x280
[  118.636083][ T4229]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  118.641713][ T4229]  ? mark_lock+0x94/0x320
[  118.646040][ T4229]  ? mutex_unlock+0x10/0x10
[  118.650539][ T4229]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  118.656522][ T4229]  ? lock_chain_count+0x20/0x20
[  118.661376][ T4229]  ? __rwlock_init+0x140/0x140
[  118.666151][ T4229]  hci_event_packet+0xe05/0x12f0
[  118.671097][ T4229]  ? lockdep_hardirqs_on+0x94/0x140
[  118.676313][ T4229]  ? rcu_lock_release+0x20/0x20
[  118.681181][ T4229]  ? hci_send_to_monitor+0x9c/0x4a0
[  118.686387][ T4229]  hci_rx_work+0x255/0xa10
[  118.690819][ T4229]  process_one_work+0x863/0x1000
[  118.695772][ T4229]  ? worker_detach_from_pool+0x240/0x240
[  118.701402][ T4229]  ? lockdep_hardirqs_off+0x70/0x100
[  118.706691][ T4229]  ? _raw_spin_lock_irq+0xab/0xe0
[  118.711713][ T4229]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  118.717088][ T4229]  ? wq_worker_running+0x97/0x170
[  118.720381][ T4270] Bluetooth: hci4: command 0x0406 tx timeout
[  118.722160][ T4229]  worker_thread+0xaa8/0x12a0
[  118.732845][ T4229]  kthread+0x436/0x520
[  118.736914][ T4229]  ? rcu_lock_release+0x20/0x20
[  118.741772][ T4229]  ? kthread_blkcg+0xd0/0xd0
[  118.746365][ T4229]  ret_from_fork+0x1f/0x30
[  118.750802][ T4229]  </TASK>
[  118.778865][ T4229] kobject_add_internal failed for hci1:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  118.792279][ T4229] Bluetooth: hci1: failed to register connection device
[  118.908465][ T4229] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:201'
[  118.918688][ T4229] CPU: 1 PID: 4229 Comm: kworker/u5:1 Not tainted syzkaller #0
[  118.926240][ T4229] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  118.936294][ T4229] Workqueue: hci1 hci_rx_work
[  118.940982][ T4229] Call Trace:
[  118.944258][ T4229]  <TASK>
[  118.947184][ T4229]  dump_stack_lvl+0x168/0x230
[  118.951854][ T4229]  ? show_regs_print_info+0x20/0x20
[  118.957068][ T4229]  ? load_image+0x3b0/0x3b0
[  118.961587][ T4229]  sysfs_create_dir_ns+0x252/0x280
[  118.966709][ T4229]  ? __lock_acquire+0x7c60/0x7c60
[  118.971743][ T4229]  ? sysfs_warn_dup+0xa0/0xa0
[  118.976414][ T4229]  ? le_conn_complete_evt+0xcbc/0x1590
[  118.981866][ T4229]  ? hci_event_packet+0xe05/0x12f0
[  118.986956][ T4229]  ? process_one_work+0x863/0x1000
[  118.992047][ T4229]  ? do_raw_spin_unlock+0x11d/0x230
[  118.997232][ T4229]  kobject_add_internal+0x662/0xd00
[  119.002451][ T4229]  kobject_add+0x152/0x210
[  119.006888][ T4229]  ? kobject_init+0x1d0/0x1d0
[  119.011568][ T4229]  ? klist_children_get+0x50/0x50
[  119.016591][ T4229]  ? get_device_parent+0x121/0x3f0
[  119.021702][ T4229]  device_add+0x483/0xfb0
[  119.026045][ T4229]  hci_conn_add_sysfs+0xd1/0x1e0
[  119.031001][ T4229]  le_conn_complete_evt+0xcbc/0x1590
[  119.036289][ T4229]  ? lock_chain_count+0x20/0x20
[  119.041154][ T4229]  ? cs_le_create_conn+0x5e0/0x5e0
[  119.046242][ T4229]  ? asm_sysvec_reschedule_ipi+0x16/0x20
[  119.051869][ T4229]  hci_le_meta_evt+0x289/0x3b80
[  119.056699][ T4229]  ? hci_event_packet+0x36d/0x12f0
[  119.061794][ T4229]  ? hci_event_packet+0x2e2/0x12f0
[  119.066882][ T4229]  ? __lock_acquire+0x7c60/0x7c60
[  119.071905][ T4229]  ? hci_remote_host_features_evt+0x280/0x280
[  119.077967][ T4229]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  119.083577][ T4229]  ? mark_lock+0x94/0x320
[  119.087893][ T4229]  ? mutex_unlock+0x10/0x10
[  119.092372][ T4229]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  119.098330][ T4229]  ? lock_chain_count+0x20/0x20
[  119.103166][ T4229]  ? __rwlock_init+0x140/0x140
[  119.107906][ T4229]  hci_event_packet+0xe05/0x12f0
[  119.112822][ T4229]  ? lockdep_hardirqs_on+0x94/0x140
[  119.118003][ T4229]  ? rcu_lock_release+0x20/0x20
[  119.121467][ T1324] Bluetooth: hci0: command 0x0406 tx timeout
[  119.122836][ T4229]  ? hci_send_to_monitor+0x9c/0x4a0
[  119.133974][ T4229]  hci_rx_work+0x255/0xa10
[  119.138378][ T4229]  process_one_work+0x863/0x1000
[  119.143298][ T4229]  ? worker_detach_from_pool+0x240/0x240
[  119.148909][ T4229]  ? lockdep_hardirqs_off+0x70/0x100
[  119.154176][ T4229]  ? _raw_spin_lock_irq+0xab/0xe0
[  119.159184][ T4229]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  119.164554][ T4229]  ? wq_worker_running+0x97/0x170
[  119.169565][ T4229]  worker_thread+0xaa8/0x12a0
[  119.174253][ T4229]  kthread+0x436/0x520
[  119.178316][ T4229]  ? rcu_lock_release+0x20/0x20
[  119.183151][ T4229]  ? kthread_blkcg+0xd0/0xd0
[  119.187720][ T4229]  ret_from_fork+0x1f/0x30
[  119.192123][ T4229]  </TASK>
[  119.197407][ T4229] kobject_add_internal failed for hci1:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  119.211779][ T4372] Bluetooth: hci1: command 0x0406 tx timeout
[  119.219677][ T4229] Bluetooth: hci1: failed to register connection device
[  119.600937][ T4290] Bluetooth: hci3: command 0x0406 tx timeout
[  119.791649][  T146] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:201'
[  119.801836][  T146] CPU: 0 PID: 146 Comm: kworker/u5:0 Not tainted syzkaller #0
[  119.809316][  T146] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  119.819378][  T146] Workqueue: hci1 hci_rx_work
[  119.824063][  T146] Call Trace:
[  119.827338][  T146]  <TASK>
[  119.830269][  T146]  dump_stack_lvl+0x168/0x230
[  119.834956][  T146]  ? show_regs_print_info+0x20/0x20
[  119.840160][  T146]  ? load_image+0x3b0/0x3b0
[  119.844676][  T146]  sysfs_create_dir_ns+0x252/0x280
[  119.849803][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  119.854837][  T146]  ? sysfs_warn_dup+0xa0/0xa0
[  119.859521][  T146]  ? le_conn_complete_evt+0xcbc/0x1590
[  119.864994][  T146]  ? hci_event_packet+0xe05/0x12f0
[  119.870127][  T146]  ? process_one_work+0x863/0x1000
[  119.875255][  T146]  ? do_raw_spin_unlock+0x11d/0x230
[  119.880457][  T146]  kobject_add_internal+0x662/0xd00
[  119.885666][  T146]  kobject_add+0x152/0x210
[  119.890100][  T146]  ? kobject_init+0x1d0/0x1d0
[  119.894788][  T146]  ? klist_children_get+0x50/0x50
[  119.899815][  T146]  ? get_device_parent+0x121/0x3f0
[  119.904945][  T146]  device_add+0x483/0xfb0
[  119.909291][  T146]  hci_conn_add_sysfs+0xd1/0x1e0
[  119.914246][  T146]  le_conn_complete_evt+0xcbc/0x1590
[  119.919534][  T146]  ? __switch_to_asm+0x34/0x60
[  119.924319][  T146]  ? cs_le_create_conn+0x5e0/0x5e0
[  119.929442][  T146]  ? __mutex_trylock_common+0x14f/0x250
[  119.934995][  T146]  hci_le_meta_evt+0x289/0x3b80
[  119.939856][  T146]  ? hci_event_packet+0x36d/0x12f0
[  119.944971][  T146]  ? hci_event_packet+0x2e2/0x12f0
[  119.950110][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  119.955177][  T146]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  119.961142][  T146]  ? lock_chain_count+0x20/0x20
[  119.965989][  T146]  ? hci_remote_host_features_evt+0x280/0x280
[  119.972048][  T146]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  119.977682][  T146]  ? mutex_unlock+0x10/0x10
[  119.982189][  T146]  ? asm_sysvec_reschedule_ipi+0x16/0x20
[  119.987836][  T146]  hci_event_packet+0xe05/0x12f0
[  119.992776][  T146]  ? lockdep_hardirqs_on+0x94/0x140
[  119.997980][  T146]  ? rcu_lock_release+0x20/0x20
[  120.002851][  T146]  ? hci_send_to_monitor+0x9c/0x4a0
[  120.008053][  T146]  hci_rx_work+0x255/0xa10
[  120.012493][  T146]  process_one_work+0x863/0x1000
[  120.017447][  T146]  ? worker_detach_from_pool+0x240/0x240
[  120.023077][  T146]  ? lockdep_hardirqs_off+0x70/0x100
[  120.028369][  T146]  ? _raw_spin_lock_irq+0xab/0xe0
[  120.033395][  T146]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  120.038769][  T146]  ? wq_worker_running+0x97/0x170
[  120.043797][  T146]  worker_thread+0xaa8/0x12a0
[  120.048516][  T146]  kthread+0x436/0x520
[  120.052587][  T146]  ? rcu_lock_release+0x20/0x20
[  120.057436][  T146]  ? kthread_blkcg+0xd0/0xd0
[  120.062035][  T146]  ret_from_fork+0x1f/0x30
[  120.066467][  T146]  </TASK>
[  120.070227][  T146] kobject_add_internal failed for hci1:201 with -EEXIST, don't try to register things with the same name in the same directory.
[  120.072829][    T7] Bluetooth: hci2: command 0x0406 tx timeout
[  120.105465][  T146] Bluetooth: hci1: failed to register connection device
[  120.124541][  T146] ==================================================================
[  120.132788][  T146] BUG: KASAN: use-after-free in l2cap_sock_new_connection_cb+0x125/0x1c0
[  120.141214][  T146] Read of size 8 at addr ffff88807bdc0550 by task kworker/u5:0/146
[  120.149098][  T146] 
[  120.151441][  T146] CPU: 1 PID: 146 Comm: kworker/u5:0 Not tainted syzkaller #0
[  120.158893][  T146] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  120.168951][  T146] Workqueue: hci1 hci_rx_work
[  120.173631][  T146] Call Trace:
[  120.176900][  T146]  <TASK>
[  120.179810][  T146]  dump_stack_lvl+0x168/0x230
[  120.184474][  T146]  ? show_regs_print_info+0x20/0x20
[  120.189674][  T146]  ? _printk+0xcc/0x110
[  120.193835][  T146]  ? l2cap_sock_new_connection_cb+0x125/0x1c0
[  120.199916][  T146]  ? load_image+0x3b0/0x3b0
[  120.204438][  T146]  print_address_description+0x60/0x2d0
[  120.209985][  T146]  ? l2cap_sock_new_connection_cb+0x125/0x1c0
[  120.216057][  T146]  kasan_report+0xdf/0x130
[  120.220487][  T146]  ? l2cap_sock_new_connection_cb+0x125/0x1c0
[  120.226577][  T146]  l2cap_sock_new_connection_cb+0x125/0x1c0
[  120.232476][  T146]  l2cap_connect_cfm+0x35d/0x10d0
[  120.237511][  T146]  ? l2cap_ertm_resend+0x1070/0x1070
[  120.242805][  T146]  ? l2cap_ertm_resend+0x1070/0x1070
[  120.248099][  T146]  le_conn_complete_evt+0xdaf/0x1590
[  120.253392][  T146]  ? __switch_to_asm+0x34/0x60
[  120.258158][  T146]  ? cs_le_create_conn+0x5e0/0x5e0
[  120.263255][  T146]  ? __mutex_trylock_common+0x14f/0x250
[  120.268781][  T146]  hci_le_meta_evt+0x289/0x3b80
[  120.273618][  T146]  ? hci_event_packet+0x36d/0x12f0
[  120.278715][  T146]  ? hci_event_packet+0x2e2/0x12f0
[  120.283830][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  120.288861][  T146]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  120.294821][  T146]  ? lock_chain_count+0x20/0x20
[  120.299658][  T146]  ? hci_remote_host_features_evt+0x280/0x280
[  120.305705][  T146]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  120.311323][  T146]  ? mutex_unlock+0x10/0x10
[  120.315801][  T146]  ? asm_sysvec_reschedule_ipi+0x16/0x20
[  120.321419][  T146]  hci_event_packet+0xe05/0x12f0
[  120.326336][  T146]  ? lockdep_hardirqs_on+0x94/0x140
[  120.331523][  T146]  ? rcu_lock_release+0x20/0x20
[  120.336411][  T146]  ? hci_send_to_monitor+0x9c/0x4a0
[  120.341629][  T146]  hci_rx_work+0x255/0xa10
[  120.346029][  T146]  process_one_work+0x863/0x1000
[  120.350948][  T146]  ? worker_detach_from_pool+0x240/0x240
[  120.356559][  T146]  ? lockdep_hardirqs_off+0x70/0x100
[  120.361822][  T146]  ? _raw_spin_lock_irq+0xab/0xe0
[  120.366821][  T146]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  120.372169][  T146]  ? wq_worker_running+0x97/0x170
[  120.377172][  T146]  worker_thread+0xaa8/0x12a0
[  120.381863][  T146]  kthread+0x436/0x520
[  120.385939][  T146]  ? rcu_lock_release+0x20/0x20
[  120.390789][  T146]  ? kthread_blkcg+0xd0/0xd0
[  120.395356][  T146]  ret_from_fork+0x1f/0x30
[  120.399756][  T146]  </TASK>
[  120.402752][  T146] 
[  120.405058][  T146] Allocated by task 146:
[  120.409277][  T146]  __kasan_kmalloc+0xb5/0xf0
[  120.413842][  T146]  sk_prot_alloc+0xe7/0x210
[  120.418319][  T146]  sk_alloc+0x2f/0x310
[  120.422361][  T146]  l2cap_sock_alloc+0x33/0x200
[  120.427124][  T146]  l2cap_sock_new_connection_cb+0xd1/0x1c0
[  120.432912][  T146]  l2cap_connect_cfm+0x35d/0x10d0
[  120.437935][  T146]  le_conn_complete_evt+0xdaf/0x1590
[  120.443199][  T146]  hci_le_meta_evt+0x289/0x3b80
[  120.448022][  T146]  hci_event_packet+0xe05/0x12f0
[  120.452936][  T146]  hci_rx_work+0x255/0xa10
[  120.457328][  T146]  process_one_work+0x863/0x1000
[  120.462236][  T146]  worker_thread+0xaa8/0x12a0
[  120.466885][  T146]  kthread+0x436/0x520
[  120.470925][  T146]  ret_from_fork+0x1f/0x30
[  120.475316][  T146] 
[  120.477612][  T146] Freed by task 15901:
[  120.481663][  T146]  kasan_set_track+0x4b/0x70
[  120.486244][  T146]  kasan_set_free_info+0x1f/0x40
[  120.491159][  T146]  ____kasan_slab_free+0xd5/0x110
[  120.496168][  T146]  slab_free_freelist_hook+0xea/0x170
[  120.501516][  T146]  kfree+0xef/0x2a0
[  120.505297][  T146]  __sk_destruct+0x578/0x840
[  120.509862][  T146]  l2cap_sock_cleanup_listen+0xda/0x270
[  120.515384][  T146]  l2cap_sock_release+0x66/0x1e0
[  120.520319][  T146]  sock_close+0xd5/0x240
[  120.524540][  T146]  __fput+0x234/0x930
[  120.528495][  T146]  task_work_run+0x125/0x1a0
[  120.533068][  T146]  do_exit+0x61e/0x20a0
[  120.537221][  T146]  do_group_exit+0x12e/0x300
[  120.541787][  T146]  get_signal+0x6ca/0x12c0
[  120.546187][  T146]  arch_do_signal_or_restart+0xc1/0x1300
[  120.551799][  T146]  exit_to_user_mode_loop+0x9e/0x130
[  120.557075][  T146]  exit_to_user_mode_prepare+0xee/0x180
[  120.562598][  T146]  syscall_exit_to_user_mode+0x16/0x40
[  120.568032][  T146]  do_syscall_64+0x58/0xa0
[  120.572425][  T146]  entry_SYSCALL_64_after_hwframe+0x66/0xd0
[  120.578294][  T146] 
[  120.580597][  T146] The buggy address belongs to the object at ffff88807bdc0000
[  120.580597][  T146]  which belongs to the cache kmalloc-2k of size 2048
[  120.594638][  T146] The buggy address is located 1360 bytes inside of
[  120.594638][  T146]  2048-byte region [ffff88807bdc0000, ffff88807bdc0800)
[  120.608068][  T146] The buggy address belongs to the page:
[  120.613680][  T146] page:ffffea0001ef7000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7bdc0
[  120.623834][  T146] head:ffffea0001ef7000 order:3 compound_mapcount:0 compound_pincount:0
[  120.632172][  T146] flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
[  120.640152][  T146] raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888016842000
[  120.648715][  T146] raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000
[  120.657270][  T146] page dumped because: kasan: bad access detected
[  120.663658][  T146] page_owner tracks the page as allocated
[  120.669344][  T146] page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d28c0(GFP_NOWAIT|__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 4288, ts 60655818127, free_ts 60606915048
[  120.690758][  T146]  get_page_from_freelist+0x1b77/0x1c60
[  120.696289][  T146]  __alloc_pages+0x1e1/0x470
[  120.700855][  T146]  new_slab+0xc0/0x4b0
[  120.704942][  T146]  ___slab_alloc+0x81e/0xdf0
[  120.709506][  T146]  __kmalloc_node_track_caller+0x1fc/0x3a0
[  120.715284][  T146]  pskb_expand_head+0x127/0x10f0
[  120.720201][  T146]  netlink_trim+0x180/0x220
[  120.724681][  T146]  netlink_broadcast_filtered+0x7c/0x1170
[  120.730414][  T146]  nlmsg_notify+0xec/0x1a0
[  120.734822][  T146]  rtnetlink_event+0x13a/0x1a0
[  120.739582][  T146]  raw_notifier_call_chain+0xcb/0x160
[  120.744930][  T146]  dev_set_mac_address+0x2c4/0x3d0
[  120.750021][  T146]  dev_set_mac_address_user+0x2d/0x50
[  120.755365][  T146]  do_setlink+0x80d/0x3980
[  120.759756][  T146]  rtnl_newlink+0x1419/0x17d0
[  120.764412][  T146]  rtnetlink_rcv_msg+0x7ff/0xe90
[  120.769335][  T146] page last free stack trace:
[  120.773979][  T146]  free_unref_page_prepare+0x637/0x6c0
[  120.779415][  T146]  free_unref_page+0x94/0x280
[  120.784069][  T146]  qlist_free_all+0x35/0x90
[  120.788568][  T146]  kasan_quarantine_reduce+0x150/0x160
[  120.794003][  T146]  __kasan_slab_alloc+0x2f/0xd0
[  120.798829][  T146]  slab_post_alloc_hook+0x4c/0x380
[  120.803930][  T146]  kmem_cache_alloc_node+0x12d/0x2d0
[  120.809198][  T146]  __alloc_skb+0xf4/0x750
[  120.813505][  T146]  inet_netconf_notify_devconf+0x16f/0x230
[  120.819295][  T146]  inetdev_event+0x71c/0x1360
[  120.823949][  T146]  raw_notifier_call_chain+0xcb/0x160
[  120.829318][  T146]  unregister_netdevice_many+0xf57/0x18f0
[  120.835028][  T146]  sit_exit_batch_net+0x498/0x4e0
[  120.840059][  T146]  cleanup_net+0x77b/0xb80
[  120.844487][  T146]  process_one_work+0x863/0x1000
[  120.849402][  T146]  worker_thread+0xaa8/0x12a0
[  120.854062][  T146] 
[  120.856372][  T146] Memory state around the buggy address:
[  120.861974][  T146]  ffff88807bdc0400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[  120.870011][  T146]  ffff88807bdc0480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[  120.878048][  T146] >ffff88807bdc0500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[  120.886100][  T146]                                                  ^
[  120.892755][  T146]  ffff88807bdc0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[  120.900792][  T146]  ffff88807bdc0600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[  120.908825][  T146] ==================================================================
[  120.916856][  T146] Disabling lock debugging due to kernel taint
[  120.953763][ T4270] Bluetooth: hci4: command 0x0406 tx timeout
[  120.967090][  T146] Kernel panic - not syncing: KASAN: panic_on_warn set ...
[  120.974298][  T146] CPU: 0 PID: 146 Comm: kworker/u5:0 Tainted: G    B             syzkaller #0
[  120.983158][  T146] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[  120.993208][  T146] Workqueue: hci1 hci_rx_work
[  120.997885][  T146] Call Trace:
[  121.001161][  T146]  <TASK>
[  121.004075][  T146]  dump_stack_lvl+0x168/0x230
[  121.008739][  T146]  ? show_regs_print_info+0x20/0x20
[  121.013921][  T146]  ? load_image+0x3b0/0x3b0
[  121.018420][  T146]  panic+0x2c9/0x7f0
[  121.022302][  T146]  ? bpf_jit_dump+0xd0/0xd0
[  121.026790][  T146]  ? _raw_spin_unlock_irqrestore+0xf6/0x100
[  121.032663][  T146]  ? _raw_spin_unlock+0x40/0x40
[  121.037497][  T146]  ? print_memory_metadata+0x314/0x400
[  121.042944][  T146]  ? l2cap_sock_new_connection_cb+0x125/0x1c0
[  121.048994][  T146]  check_panic_on_warn+0x80/0xa0
[  121.053909][  T146]  ? l2cap_sock_new_connection_cb+0x125/0x1c0
[  121.059958][  T146]  end_report+0x6d/0xf0
[  121.064091][  T146]  kasan_report+0x102/0x130
[  121.068574][  T146]  ? l2cap_sock_new_connection_cb+0x125/0x1c0
[  121.074620][  T146]  l2cap_sock_new_connection_cb+0x125/0x1c0
[  121.080493][  T146]  l2cap_connect_cfm+0x35d/0x10d0
[  121.085528][  T146]  ? l2cap_ertm_resend+0x1070/0x1070
[  121.090793][  T146]  ? l2cap_ertm_resend+0x1070/0x1070
[  121.096057][  T146]  le_conn_complete_evt+0xdaf/0x1590
[  121.101323][  T146]  ? __switch_to_asm+0x34/0x60
[  121.106068][  T146]  ? cs_le_create_conn+0x5e0/0x5e0
[  121.111167][  T146]  ? __mutex_trylock_common+0x14f/0x250
[  121.116693][  T146]  hci_le_meta_evt+0x289/0x3b80
[  121.121529][  T146]  ? hci_event_packet+0x36d/0x12f0
[  121.126621][  T146]  ? hci_event_packet+0x2e2/0x12f0
[  121.131711][  T146]  ? __lock_acquire+0x7c60/0x7c60
[  121.136724][  T146]  ? lockdep_hardirqs_on_prepare+0x3fc/0x760
[  121.142686][  T146]  ? lock_chain_count+0x20/0x20
[  121.147513][  T146]  ? hci_remote_host_features_evt+0x280/0x280
[  121.153565][  T146]  ? __mutex_unlock_slowpath+0x19e/0x6a0
[  121.159180][  T146]  ? mutex_unlock+0x10/0x10
[  121.163660][  T146]  ? asm_sysvec_reschedule_ipi+0x16/0x20
[  121.169274][  T146]  hci_event_packet+0xe05/0x12f0
[  121.174189][  T146]  ? lockdep_hardirqs_on+0x94/0x140
[  121.179368][  T146]  ? rcu_lock_release+0x20/0x20
[  121.184197][  T146]  ? hci_send_to_monitor+0x9c/0x4a0
[  121.189376][  T146]  hci_rx_work+0x255/0xa10
[  121.193782][  T146]  process_one_work+0x863/0x1000
[  121.198700][  T146]  ? worker_detach_from_pool+0x240/0x240
[  121.204316][  T146]  ? lockdep_hardirqs_off+0x70/0x100
[  121.209580][  T146]  ? _raw_spin_lock_irq+0xab/0xe0
[  121.214589][  T146]  ? _raw_spin_lock_irqsave+0xf0/0xf0
[  121.219949][  T146]  ? wq_worker_running+0x97/0x170
[  121.224951][  T146]  worker_thread+0xaa8/0x12a0
[  121.229620][  T146]  kthread+0x436/0x520
[  121.233685][  T146]  ? rcu_lock_release+0x20/0x20
[  121.238516][  T146]  ? kthread_blkcg+0xd0/0xd0
[  121.243100][  T146]  ret_from_fork+0x1f/0x30
[  121.247501][  T146]  </TASK>
[  121.250735][  T146] Kernel Offset: disabled
[  121.255057][  T146] Rebooting in 86400 seconds..