syzbot

INFO: task kworker/0:0:8 blocked for more than 143 seconds.
      Tainted: G        W          6.10.0-rc1-next-20240603-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:0     state:D
 stack:22808 pid:8     tgid:8     ppid:2      flags:0x00004000
Workqueue: usb_hub_wq hub_event

Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5192 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
 rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178
 __down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306
 kernfs_add_one+0x9a/0x8b0 fs/kernfs/dir.c:778
 kernfs_create_dir_ns+0xd9/0x120 fs/kernfs/dir.c:1071
 sysfs_create_dir_ns+0x189/0x3a0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x435/0x8d0 lib/kobject.c:240
 kobject_add_varg lib/kobject.c:374 [inline]
 kobject_add+0x152/0x220 lib/kobject.c:426
 device_add+0x4e5/0xbf0 drivers/base/core.c:3659
 usb_new_device+0x104a/0x19a0 drivers/usb/core/hub.c:2651
 hub_port_connect drivers/usb/core/hub.c:5521 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5661 [inline]
 port_event drivers/usb/core/hub.c:5821 [inline]
 hub_event+0x2d6a/0x5150 drivers/usb/core/hub.c:5903
 process_one_work kernel/workqueue.c:3248 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329
 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
INFO: task kworker/0:2:785 blocked for more than 144 seconds.
      Tainted: G        W          6.10.0-rc1-next-20240603-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:2     state:D
 stack:21784 pid:785   tgid:785   ppid:2      flags:0x00004000
Workqueue: usb_hub_wq hub_event

Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5192 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
 rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178
 __down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306
 kernfs_add_one+0x9a/0x8b0 fs/kernfs/dir.c:778
 kernfs_create_dir_ns+0xd9/0x120 fs/kernfs/dir.c:1071
 sysfs_create_dir_ns+0x189/0x3a0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x435/0x8d0 lib/kobject.c:240
 kobject_add_varg lib/kobject.c:374 [inline]
 kobject_add+0x152/0x220 lib/kobject.c:426
 device_add+0x4e5/0xbf0 drivers/base/core.c:3659
 usb_new_device+0x104a/0x19a0 drivers/usb/core/hub.c:2651
 hub_port_connect drivers/usb/core/hub.c:5521 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5661 [inline]
 port_event drivers/usb/core/hub.c:5821 [inline]
 hub_event+0x2d6a/0x5150 drivers/usb/core/hub.c:5903
 process_one_work kernel/workqueue.c:3248 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329
 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
INFO: task syz-executor130:5120 blocked for more than 145 seconds.
      Tainted: G        W          6.10.0-rc1-next-20240603-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor130 state:D
 stack:23664 pid:5120  tgid:5120  ppid:5117   flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5192 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
 rwsem_down_read_slowpath kernel/locking/rwsem.c:1086 [inline]
 __down_read_common kernel/locking/rwsem.c:1250 [inline]
 __down_read kernel/locking/rwsem.c:1263 [inline]
 down_read+0x705/0xa40 kernel/locking/rwsem.c:1528
 kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159
 lookup_fast+0x1f4/0x4a0
 walk_component fs/namei.c:2000 [inline]
 link_path_walk+0x60b/0xea0 fs/namei.c:2331
 path_openat+0x24a/0x3280 fs/namei.c:3807
 do_filp_open+0x235/0x490 fs/namei.c:3838
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1409
 do_sys_open fs/open.c:1424 [inline]
 __do_sys_openat fs/open.c:1440 [inline]
 __se_sys_openat fs/open.c:1435 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1435
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe24bf311b1
RSP: 002b:00007ffe74703a40 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe24bf311b1
RDX: 0000000000090800 RSI: 00007fe24bf85004 RDI: 00000000ffffff9c
RBP: 0000000000000007 R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffe74703c38
R13: 00007ffe74703c38 R14: 00007ffe74703c90 R15: 00007ffe74703c80
 </TASK>
INFO: task syz-executor130:5121 blocked for more than 145 seconds.
      Tainted: G        W          6.10.0-rc1-next-20240603-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor130 state:D
 stack:25072 pid:5121  tgid:5121  ppid:5118   flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5192 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
 rwsem_down_read_slowpath kernel/locking/rwsem.c:1086 [inline]
 __down_read_common kernel/locking/rwsem.c:1250 [inline]
 __down_read kernel/locking/rwsem.c:1263 [inline]
 down_read+0x705/0xa40 kernel/locking/rwsem.c:1528
 kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159
 lookup_fast+0x1f4/0x4a0
 walk_component fs/namei.c:2000 [inline]
 link_path_walk+0x60b/0xea0 fs/namei.c:2331
 path_openat+0x24a/0x3280 fs/namei.c:3807
 do_filp_open+0x235/0x490 fs/namei.c:3838
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1409
 do_sys_open fs/open.c:1424 [inline]
 __do_sys_openat fs/open.c:1440 [inline]
 __se_sys_openat fs/open.c:1435 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1435
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe24bf311b1
RSP: 002b:00007ffe74703a40 EFLAGS: 00000287
 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe24bf311b1
RDX: 0000000000090800 RSI: 00007fe24bf85004 RDI: 00000000ffffff9c
RBP: 0000000000000007 R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffe74703c38
R13: 00007ffe74703c38 R14: 00007ffe74703c90 R15: 00007ffe74703c80
 </TASK>
INFO: task syz-executor130:5124 blocked for more than 146 seconds.
      Tainted: G        W          6.10.0-rc1-next-20240603-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor130 state:D stack:23928 pid:5124  tgid:5124  ppid:5119   flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5192 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
 rwsem_down_read_slowpath kernel/locking/rwsem.c:1086 [inline]
 __down_read_common kernel/locking/rwsem.c:1250 [inline]
 __down_read kernel/locking/rwsem.c:1263 [inline]
 down_read+0x705/0xa40 kernel/locking/rwsem.c:1528
 kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159
 lookup_fast+0x1f4/0x4a0
 walk_component fs/namei.c:2000 [inline]
 link_path_walk+0x60b/0xea0 fs/namei.c:2331
 path_openat+0x24a/0x3280 fs/namei.c:3807
 do_filp_open+0x235/0x490 fs/namei.c:3838
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1409
 do_sys_open fs/open.c:1424 [inline]
 __do_sys_openat fs/open.c:1440 [inline]
 __se_sys_openat fs/open.c:1435 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1435
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe24bf311b1
RSP: 002b:00007ffe74703a40 EFLAGS: 00000287
 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe24bf311b1
RDX: 0000000000090800 RSI: 00007fe24bf85004 RDI: 00000000ffffff9c
RBP: 0000000000000007 R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffe74703c38
R13: 00007ffe74703c38 R14: 00007ffe74703c90 R15: 00007ffe74703c80
 </TASK>
INFO: task syz-executor130:5125 blocked for more than 147 seconds.
      Tainted: G        W          6.10.0-rc1-next-20240603-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor130 state:D
 stack:23472 pid:5125  tgid:5125  ppid:5123   flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5192 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
 rwsem_down_read_slowpath kernel/locking/rwsem.c:1086 [inline]
 __down_read_common kernel/locking/rwsem.c:1250 [inline]
 __down_read kernel/locking/rwsem.c:1263 [inline]
 down_read+0x705/0xa40 kernel/locking/rwsem.c:1528
 kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159
 lookup_fast+0x1f4/0x4a0
 walk_component fs/namei.c:2000 [inline]
 link_path_walk+0x60b/0xea0 fs/namei.c:2331
 path_openat+0x24a/0x3280 fs/namei.c:3807
 do_filp_open+0x235/0x490 fs/namei.c:3838
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1409
 do_sys_open fs/open.c:1424 [inline]
 __do_sys_openat fs/open.c:1440 [inline]
 __se_sys_openat fs/open.c:1435 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1435
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe24bf311b1
RSP: 002b:00007ffe74703a40 EFLAGS: 00000287
 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe24bf311b1
RDX: 0000000000090800 RSI: 00007fe24bf85004 RDI: 00000000ffffff9c
RBP: 0000000000000007 R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffe74703c38
R13: 00007ffe74703c38 R14: 00007ffe74703c90 R15: 00007ffe74703c80
 </TASK>
INFO: task syz-executor130:5126 blocked for more than 148 seconds.
      Tainted: G        W          6.10.0-rc1-next-20240603-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor130 state:D
 stack:24496 pid:5126  tgid:5126  ppid:5122   flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5192 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
 rwsem_down_read_slowpath kernel/locking/rwsem.c:1086 [inline]
 __down_read_common kernel/locking/rwsem.c:1250 [inline]
 __down_read kernel/locking/rwsem.c:1263 [inline]
 down_read+0x705/0xa40 kernel/locking/rwsem.c:1528
 kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159
 lookup_fast+0x1f4/0x4a0
 walk_component fs/namei.c:2000 [inline]
 link_path_walk+0x60b/0xea0 fs/namei.c:2331
 path_openat+0x24a/0x3280 fs/namei.c:3807
 do_filp_open+0x235/0x490 fs/namei.c:3838
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1409
 do_sys_open fs/open.c:1424 [inline]
 __do_sys_openat fs/open.c:1440 [inline]
 __se_sys_openat fs/open.c:1435 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1435
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe24bf311b1
RSP: 002b:00007ffe74703a40 EFLAGS: 00000287
 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe24bf311b1
RDX: 0000000000090800 RSI: 00007fe24bf85004 RDI: 00000000ffffff9c
RBP: 0000000000000007 R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffe74703c38
R13: 00007ffe74703c38 R14: 00007ffe74703c90 R15: 00007ffe74703c80
 </TASK>
INFO: task kworker/u9:2:5128 blocked for more than 149 seconds.
      Tainted: G        W          6.10.0-rc1-next-20240603-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u9:2    state:D stack:25976 pid:5128  tgid:5128  ppid:2      flags:0x00004000
Workqueue: hci4 hci_cmd_sync_work

Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5192 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
 rwsem_down_read_slowpath kernel/locking/rwsem.c:1086 [inline]
 __down_read_common kernel/locking/rwsem.c:1250 [inline]
 __down_read kernel/locking/rwsem.c:1263 [inline]
 down_read+0x705/0xa40 kernel/locking/rwsem.c:1528
 kernfs_find_and_get_ns+0x71/0x110 fs/kernfs/dir.c:918
 kernfs_find_and_get include/linux/kernfs.h:604 [inline]
 sysfs_unmerge_group+0x62/0x130 fs/sysfs/group.c:396
 dpm_sysfs_remove+0x5d/0xc0 drivers/base/power/sysfs.c:833
 device_del+0x291/0x9b0 drivers/base/core.c:3885
 device_unregister+0x20/0xc0 drivers/base/core.c:3951
 hci_conn_cleanup net/bluetooth/hci_conn.c:176 [inline]
 hci_conn_del+0x8c4/0xc40 net/bluetooth/hci_conn.c:1154
 hci_abort_conn_sync+0x583/0xde0 net/bluetooth/hci_sync.c:5450
 hci_cmd_sync_work+0x22b/0x400 net/bluetooth/hci_sync.c:310
 process_one_work kernel/workqueue.c:3248 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329
 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Showing all locks held in the system:
6 locks held by kworker/0:0/8:
 #0: 
ffff88801c6d9548
 (
(wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3223 [inline]
, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
 #1: 
ffffc900000d7d00
 (
(work_completion)(&hub->events)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3224 [inline]
, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
 #2: 
ffff888023be3190
 (
&dev->mutex
){....}-{3:3}
, at: device_lock include/linux/device.h:1009 [inline]
, at: hub_event+0x1fe/0x5150 drivers/usb/core/hub.c:5849
 #3: 
ffff8880b943e7d8
 (
&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560
 #4: ffffffff8e20fa30 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:331 [inline]
 #4: ffffffff8e20fa30 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:232 [inline]
 #4: ffffffff8e20fa30 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:287 [inline]
 #4: ffffffff8e20fa30 (console_srcu){....}-{0:0}, at: console_flush_all+0x147/0xf50 kernel/printk/printk.c:3033
 #5: ffffffff8e20fdc0 (console_owner){-.-.}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:331 [inline]
 #5: ffffffff8e20fdc0 (console_owner){-.-.}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:232 [inline]
 #5: ffffffff8e20fdc0 (console_owner){-.-.}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:287 [inline]
 #5: ffffffff8e20fdc0 (console_owner){-.-.}-{0:0}, at: console_flush_all+0x147/0xf50 kernel/printk/printk.c:3033
BUG: using smp_processor_id() in preemptible [00000000] code: khungtaskd/30
caller is nbcon_get_cpu_emergency_nesting+0x15/0x90 kernel/printk/nbcon.c:959
CPU: 0 PID: 30 Comm: khungtaskd Tainted: G        W          6.10.0-rc1-next-20240603-syzkaller #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:91 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:117
 check_preemption_disabled+0x10e/0x120 lib/smp_processor_id.c:49
 nbcon_get_cpu_emergency_nesting+0x15/0x90 kernel/printk/nbcon.c:959
 nbcon_cpu_emergency_flush+0x11/0x190 kernel/printk/nbcon.c:1324
 debug_show_all_locks+0x19c/0x2a0 kernel/locking/lockdep.c:6694
 check_hung_uninterruptible_tasks kernel/hung_task.c:219 [inline]
 watchdog+0xf9a/0x1020 kernel/hung_task.c:379
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
1 lock held by khungtaskd/30:
 #0: ffffffff8e334560 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 #0: ffffffff8e334560 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #0: ffffffff8e334560 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6689
BUG: using smp_processor_id() in preemptible [00000000] code: khungtaskd/30
caller is nbcon_get_cpu_emergency_nesting+0x15/0x90 kernel/printk/nbcon.c:959
CPU: 0 PID: 30 Comm: khungtaskd Tainted: G        W          6.10.0-rc1-next-20240603-syzkaller #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:91 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:117
 check_preemption_disabled+0x10e/0x120 lib/smp_processor_id.c:49
 nbcon_get_cpu_emergency_nesting+0x15/0x90 kernel/printk/nbcon.c:959
 nbcon_cpu_emergency_flush+0x11/0x190 kernel/printk/nbcon.c:1324
 debug_show_all_locks+0x19c/0x2a0 kernel/locking/lockdep.c:6694
 check_hung_uninterruptible_tasks kernel/hung_task.c:219 [inline]
 watchdog+0xf9a/0x1020 kernel/hung_task.c:379
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
4 locks held by kworker/1:1/45:
 #0: ffff88801c6d9548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline]
 #0: ffff88801c6d9548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
 #1: ffffc90000b57d00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline]
 #1: ffffc90000b57d00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
 #2: ffff888023bb3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
 #2: ffff888023bb3190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x5150 drivers/usb/core/hub.c:5849
 #3: ffff8880b953e7d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560
BUG: using smp_processor_id() in preemptible [00000000] code: khungtaskd/30
caller is nbcon_get_cpu_emergency_nesting+0x15/0x90 kernel/printk/nbcon.c:959
CPU: 0 PID: 30 Comm: khungtaskd Tainted: G        W          6.10.0-rc1-next-20240603-syzkaller #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:91 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:117
 check_preemption_disabled+0x10e/0x120 lib/smp_processor_id.c:49
 nbcon_get_cpu_emergency_nesting+0x15/0x90 kernel/printk/nbcon.c:959
 nbcon_cpu_emergency_flush+0x11/0x190 kernel/printk/nbcon.c:1324
 debug_show_all_locks+0x19c/0x2a0 kernel/locking/lockdep.c:6694
 check_hung_uninterruptible_tasks kernel/hung_task.c:219 [inline]
 watchdog+0xf9a/0x1020 kernel/hung_task.c:379
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
7 locks held by kworker/1:2/57:
 #0: ffff88801c6d9548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline]
 #0: ffff88801c6d9548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
 #1: ffffc900013b7d00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline]
 #1: ffffc900013b7d00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
 #2: ffff888023a81190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
 #2: ffff888023a81190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x5150 drivers/usb/core/hub.c:5849
 #3: ffff888023806190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
 #3: ffff888023806190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x103/0x950 drivers/usb/core/hub.c:2295
 #4: ffff8880794b6160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
 #4: ffff8880794b6160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1093 [inline]
 #4: ffff8880794b6160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1290
 #5: ffffffff8f0aa1e8 (input_mutex){+.+.}-{3:3}, at: __input_unregister_device+0x308/0x630 drivers/input/input.c:2293
 #6: ffffffff8e339938 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline]
 #6: ffffffff8e339938 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:959
BUG: using smp_processor_id() in preemptible [00000000] code: khungtaskd/30
caller is nbcon_get_cpu_emergency_nesting+0x15/0x90 kernel/printk/nbcon.c:959
CPU: 0 PID: 30 Comm: khungtaskd Tainted: G        W          6.10.0-rc1-next-20240603-syzkaller #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:91 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:117
 check_preemption_disabled+0x10e/0x120 lib/smp_processor_id.c:49
 nbcon_get_cpu_emergency_nesting+0x15/0x90 kernel/printk/nbcon.c:959
 nbcon_cpu_emergency_flush+0x11/0x190 kernel/printk/nbcon.c:1324
 debug_show_all_locks+0x19c/0x2a0 kernel/locking/lockdep.c:6694
 check_hung_uninterruptible_tasks kernel/hung_task.c:219 [inline]
 watchdog+0xf9a/0x1020 kernel/hung_task.c:379
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
6 locks held by kworker/0:2/785:
 #0: ffff88801c6d9548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline]
 #0: ffff88801c6d9548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
 #1: ffffc9000362fd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline]
 #1: ffffc9000362fd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
 #2: ffff888023c18190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
 #2: ffff888023c18190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x5150 drivers/usb/core/hub.c:5849
 #3: ffff8880237c0190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
 #3: ffff8880237c0190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8e/0x520 drivers/base/dd.c:1003
 #4: ffff88801bed5160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
 #4: ffff88801bed5160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8e/0x520 drivers/base/dd.c:1003
 #5: ffffffff8f0aa1e8 (input_mutex){+.+.}-{3:3}, at: input_register_device+0xade/0x1090 drivers/input/input.c:2463
BUG: using smp_processor_id() in preemptible [00000000] code: khungtaskd/30
caller is nbcon_get_cpu_emergency_nesting+0x15/0x90 kernel/printk/nbcon.c:959
CPU: 0 PID: 30 Comm: khungtaskd Tainted: G        W          6.10.0-rc1-next-20240603-syzkaller #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:91 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:117
 check_preemption_disabled+0x10e/0x120 lib/smp_processor_id.c:49
 nbcon_get_cpu_emergency_nesting+0x15/0x90 kernel/printk/nbcon.c:959
 nbcon_cpu_emergency_flush+0x11/0x190 kernel/printk/nbcon.c:1324
 debug_show_all_locks+0x19c/0x2a0 kernel/locking/lockdep.c:6694
 check_hung_uninterruptible_tasks kernel/hung_task.c:219 [inline]
 watchdog+0xf9a/0x1020 kernel/hung_task.c:379
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
5 locks held by kworker/u8:7/2446:
BUG: using smp_processor_id() in preemptible [00000000] code: khungtaskd/30
caller is nbcon_get_cpu_emergency_nesting+0x15/0x90 kernel/printk/nbcon.c:959
CPU: 0 PID: 30 Comm: khungtaskd Tainted: G        W          6.10.0-rc1-next-20240603-syzkaller #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:91 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:117
 check_preemption_disabled+0x10e/0x120 lib/smp_processor_id.c:49
 nbcon_get_cpu_emergency_nesting+0x15/0x90 kernel/printk/nbcon.c:959
 nbcon_cpu_emergency_flush+0x11/0x190 kernel/printk/nbcon.c:1324
 debug_show_all_locks+0x19c/0x2a0 kernel/locking/lockdep.c:6694
 check_hung_uninterruptible_tasks kernel/hung_task.c:219 [inline]
 watchdog+0xf9a/0x1020 kernel/hung_task.c:379
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
2 locks held by getty/4853:
 #0: 
ffff88802af3e0a0
 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: 
ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
BUG: using smp_processor_id() in preemptible [00000000] code: khungtaskd/30
caller is nbcon_get_cpu_emergency_nesting+0x15/0x90 kernel/printk/nbcon.c:959
CPU: 1 PID: 30 Comm: khungtaskd Tainted: G        W          6.10.0-rc1-next-20240603-syzkaller #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:91 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:117
 check_preemption_disabled+0x10e/0x120 lib/smp_processor_id.c:49
 nbcon_get_cpu_emergency_nesting+0x15/0x90 kernel/printk/nbcon.c:959
 nbcon_cpu_emergency_flush+0x11/0x190 kernel/printk/nbcon.c:1324
 debug_show_all_locks+0x19c/0x2a0 kernel/locking/lockdep.c:6694
 check_hung_uninterruptible_tasks kernel/hung_task.c:219 [inline]
 watchdog+0xf9a/0x1020 kernel/hung_task.c:379
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
4 locks held by udevd/5127:
 #0: ffff88801f4cb668 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xb7/0xd60 fs/seq_file.c:182
 #1: ffff8880228f1088 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_seq_start+0x53/0x3b0 fs/kernfs/file.c:154
 #2: ffff888021f861e8 (kn->active#25){++++}-{0:0}, at: kernfs_seq_start+0x72/0x3b0 fs/kernfs/file.c:155
 #3: ffff88801becb190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:1014 [inline]
 #3: ffff88801becb190 (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
BUG: using smp_processor_id() in preemptible [00000000] code: khungtaskd/30
caller is nbcon_get_cpu_emergency_nesting+0x15/0x90 kernel/printk/nbcon.c:959
CPU: 0 PID: 30 Comm: khungtaskd Tainted: G        W          6.10.0-rc1-next-20240603-syzkaller #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:91 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:117
 check_preemption_disabled+0x10e/0x120 lib/smp_processor_id.c:49
 nbcon_get_cpu_emergency_nesting+0x15/0x90 kernel/printk/nbcon.c:959
 nbcon_cpu_emergency_flush+0x11/0x190 kernel/printk/nbcon.c:1324
 debug_show_all_locks+0x19c/0x2a0 kernel/locking/lockdep.c:6694
 check_hung_uninterruptible_tasks kernel/hung_task.c:219 [inline]
 watchdog+0xf9a/0x1020 kernel/hung_task.c:379
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
4 locks held by kworker/1:4/5129:
 #0: ffff88801c6d9548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline]
 #0: ffff88801c6d9548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
 #1: ffffc900042a7d00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline]
 #1: ffffc900042a7d00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
 #2: ffff888023ba0190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
 #2: ffff888023ba0190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x5150 drivers/usb/core/hub.c:5849
 #3: ffff88807a793190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
 #3: ffff88807a793190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8e/0x520 drivers/base/dd.c:1003
BUG: using smp_processor_id() in preemptible [00000000] code: khungtaskd/30
caller is nbcon_get_cpu_emergency_nesting+0x15/0x90 kernel/printk/nbcon.c:959
CPU: 0 PID: 30 Comm: khungtaskd Tainted: G        W          6.10.0-rc1-next-20240603-syzkaller #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace: