From: syzbot <syzbot+76629376e06e2c2ad626@syzkaller.appspotmail.com>
To: admindpt@BOC.com, brauner@kernel.org, broonie@kernel.org,
catalin.marinas@arm.com, ebiederm@xmission.com,
gregkh@linuxfoundation.org, hdanton@sina.com, johan@kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org,
madvenka@linux.microsoft.com, mark.rutland@arm.com,
paskripkin@gmail.com, qiazbgvr@Amazon.co.jp,
scott@os.amperecomputing.com, stable@vger.kernel.org,
stern@rowland.harvard.edu, support@tokocrypto.com,
syzkaller-bugs@googlegroups.com, will@kernel.org
Subject: Re: [syzbot] INFO: task hung in hub_port_init (2)
Date: Sun, 18 Sep 2022 18:54:31 -0700 [thread overview]
Message-ID: <0000000000001b70f305e8fdfeba@google.com> (raw)
In-Reply-To: <000000000000d893d805d0def1a0@google.com>
syzbot has found a reproducer for the following issue on:
HEAD commit: a6b443748715 Merge branch 'for-next/core', remote-tracking..
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=16b7e0f8880000
kernel config: https://syzkaller.appspot.com/x/.config?x=14bf9ec0df433b27
dashboard link: https://syzkaller.appspot.com/bug?extid=76629376e06e2c2ad626
compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=111ff2d5080000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11667887080000
Downloadable assets:
disk image: https://storage.googleapis.com/81b491dd5861/disk-a6b44374.raw.xz
vmlinux: https://storage.googleapis.com/69c979cdc99a/vmlinux-a6b44374.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+76629376e06e2c2ad626@syzkaller.appspotmail.com
INFO: task kworker/0:0:6 blocked for more than 143 seconds.
Not tainted 6.0.0-rc4-syzkaller-17255-ga6b443748715 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:0 state:D stack: 0 pid: 6 ppid: 2 flags:0x00000008
Workqueue: usb_hub_wq hub_event
Call trace:
__switch_to+0x180/0x28c arch/arm64/kernel/process.c:557
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x414/0x5a0 kernel/sched/core.c:6494
schedule+0x64/0xa4 kernel/sched/core.c:6570
usb_kill_urb+0xe0/0x1c8 drivers/usb/core/urb.c:726
usb_start_wait_urb+0xf8/0x1ec drivers/usb/core/message.c:64
usb_internal_control_msg drivers/usb/core/message.c:102 [inline]
usb_control_msg+0xd8/0x17c drivers/usb/core/message.c:153
hub_port_init+0x534/0x1064 drivers/usb/core/hub.c:4825
hub_port_connect+0x528/0xe30 drivers/usb/core/hub.c:5282
hub_port_connect_change+0x3d8/0x70c drivers/usb/core/hub.c:5497
port_event+0x780/0x930 drivers/usb/core/hub.c:5653
hub_event+0x2f0/0x658 drivers/usb/core/hub.c:5735
process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
worker_thread+0x340/0x610 kernel/workqueue.c:2436
kthread+0x12c/0x158 kernel/kthread.c:376
ret_from_fork+0x10/0x20
INFO: task kworker/1:0:20 blocked for more than 143 seconds.
Not tainted 6.0.0-rc4-syzkaller-17255-ga6b443748715 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:0 state:D stack: 0 pid: 20 ppid: 2 flags:0x00000008
Workqueue: usb_hub_wq hub_event
Call trace:
__switch_to+0x180/0x28c arch/arm64/kernel/process.c:557
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x414/0x5a0 kernel/sched/core.c:6494
schedule+0x64/0xa4 kernel/sched/core.c:6570
usb_kill_urb+0xe0/0x1c8 drivers/usb/core/urb.c:726
usb_start_wait_urb+0xf8/0x1ec drivers/usb/core/message.c:64
usb_internal_control_msg drivers/usb/core/message.c:102 [inline]
usb_control_msg+0xd8/0x17c drivers/usb/core/message.c:153
hub_port_init+0x534/0x1064 drivers/usb/core/hub.c:4825
hub_port_connect+0x528/0xe30 drivers/usb/core/hub.c:5282
hub_port_connect_change+0x3d8/0x70c drivers/usb/core/hub.c:5497
port_event+0x780/0x930 drivers/usb/core/hub.c:5653
hub_event+0x2f0/0x658 drivers/usb/core/hub.c:5735
process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
worker_thread+0x340/0x610 kernel/workqueue.c:2436
kthread+0x12c/0x158 kernel/kthread.c:376
ret_from_fork+0x10/0x20
INFO: task kworker/1:2:109 blocked for more than 143 seconds.
Not tainted 6.0.0-rc4-syzkaller-17255-ga6b443748715 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:2 state:D stack: 0 pid: 109 ppid: 2 flags:0x00000008
Workqueue: usb_hub_wq hub_event
Call trace:
__switch_to+0x180/0x28c arch/arm64/kernel/process.c:557
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x414/0x5a0 kernel/sched/core.c:6494
schedule+0x64/0xa4 kernel/sched/core.c:6570
usb_kill_urb+0xe0/0x1c8 drivers/usb/core/urb.c:726
usb_start_wait_urb+0xf8/0x1ec drivers/usb/core/message.c:64
usb_internal_control_msg drivers/usb/core/message.c:102 [inline]
usb_control_msg+0xd8/0x17c drivers/usb/core/message.c:153
hub_port_init+0x534/0x1064 drivers/usb/core/hub.c:4825
hub_port_connect+0x528/0xe30 drivers/usb/core/hub.c:5282
hub_port_connect_change+0x3d8/0x70c drivers/usb/core/hub.c:5497
port_event+0x780/0x930 drivers/usb/core/hub.c:5653
hub_event+0x2f0/0x658 drivers/usb/core/hub.c:5735
process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
worker_thread+0x340/0x610 kernel/workqueue.c:2436
kthread+0x12c/0x158 kernel/kthread.c:376
ret_from_fork+0x10/0x20
INFO: task syz-executor535:3088 blocked for more than 143 seconds.
Not tainted 6.0.0-rc4-syzkaller-17255-ga6b443748715 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor535 state:D stack: 0 pid: 3088 ppid: 3083 flags:0x00000001
Call trace:
__switch_to+0x180/0x28c arch/arm64/kernel/process.c:557
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x414/0x5a0 kernel/sched/core.c:6494
schedule+0x64/0xa4 kernel/sched/core.c:6570
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6629
__mutex_lock_common+0x788/0xca8 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
device_lock include/linux/device.h:835 [inline]
usbdev_release+0x40/0x3b8 drivers/usb/core/devio.c:1087
__fput+0x198/0x3dc fs/file_table.c:320
____fput+0x20/0x30 fs/file_table.c:353
task_work_run+0xc4/0x14c kernel/task_work.c:177
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
do_notify_resume+0x174/0x1f0 arch/arm64/kernel/signal.c:1127
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:625
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642
el0t_64_sync+0x18c/0x190
INFO: task kworker/0:1:3090 blocked for more than 143 seconds.
Not tainted 6.0.0-rc4-syzkaller-17255-ga6b443748715 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:1 state:D stack: 0 pid: 3090 ppid: 2 flags:0x00000008
Workqueue: usb_hub_wq hub_event
Call trace:
__switch_to+0x180/0x28c arch/arm64/kernel/process.c:557
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x414/0x5a0 kernel/sched/core.c:6494
schedule+0x64/0xa4 kernel/sched/core.c:6570
usb_kill_urb+0xe0/0x1c8 drivers/usb/core/urb.c:726
usb_start_wait_urb+0xf8/0x1ec drivers/usb/core/message.c:64
usb_internal_control_msg drivers/usb/core/message.c:102 [inline]
usb_control_msg+0xd8/0x17c drivers/usb/core/message.c:153
hub_port_init+0x534/0x1064 drivers/usb/core/hub.c:4825
hub_port_connect+0x528/0xe30 drivers/usb/core/hub.c:5282
hub_port_connect_change+0x3d8/0x70c drivers/usb/core/hub.c:5497
port_event+0x780/0x930 drivers/usb/core/hub.c:5653
hub_event+0x2f0/0x658 drivers/usb/core/hub.c:5735
process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
worker_thread+0x340/0x610 kernel/workqueue.c:2436
kthread+0x12c/0x158 kernel/kthread.c:376
ret_from_fork+0x10/0x20
INFO: task syz-executor535:3091 blocked for more than 143 seconds.
Not tainted 6.0.0-rc4-syzkaller-17255-ga6b443748715 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor535 state:D stack: 0 pid: 3091 ppid: 3080 flags:0x00000001
Call trace:
__switch_to+0x180/0x28c arch/arm64/kernel/process.c:557
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x414/0x5a0 kernel/sched/core.c:6494
schedule+0x64/0xa4 kernel/sched/core.c:6570
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6629
__mutex_lock_common+0x788/0xca8 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
device_lock include/linux/device.h:835 [inline]
usbdev_release+0x40/0x3b8 drivers/usb/core/devio.c:1087
__fput+0x198/0x3dc fs/file_table.c:320
____fput+0x20/0x30 fs/file_table.c:353
task_work_run+0xc4/0x14c kernel/task_work.c:177
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
do_notify_resume+0x174/0x1f0 arch/arm64/kernel/signal.c:1127
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:625
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642
el0t_64_sync+0x18c/0x190
INFO: task syz-executor535:3092 blocked for more than 143 seconds.
Not tainted 6.0.0-rc4-syzkaller-17255-ga6b443748715 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor535 state:D stack: 0 pid: 3092 ppid: 3082 flags:0x00000001
Call trace:
__switch_to+0x180/0x28c arch/arm64/kernel/process.c:557
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x414/0x5a0 kernel/sched/core.c:6494
schedule+0x64/0xa4 kernel/sched/core.c:6570
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6629
__mutex_lock_common+0x788/0xca8 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
device_lock include/linux/device.h:835 [inline]
usbdev_release+0x40/0x3b8 drivers/usb/core/devio.c:1087
__fput+0x198/0x3dc fs/file_table.c:320
____fput+0x20/0x30 fs/file_table.c:353
task_work_run+0xc4/0x14c kernel/task_work.c:177
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
do_notify_resume+0x174/0x1f0 arch/arm64/kernel/signal.c:1127
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:625
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642
el0t_64_sync+0x18c/0x190
INFO: task syz-executor535:3096 blocked for more than 143 seconds.
Not tainted 6.0.0-rc4-syzkaller-17255-ga6b443748715 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor535 state:D stack: 0 pid: 3096 ppid: 3084 flags:0x00000001
Call trace:
__switch_to+0x180/0x28c arch/arm64/kernel/process.c:557
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x414/0x5a0 kernel/sched/core.c:6494
schedule+0x64/0xa4 kernel/sched/core.c:6570
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6629
__mutex_lock_common+0x788/0xca8 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
device_lock include/linux/device.h:835 [inline]
usbdev_release+0x40/0x3b8 drivers/usb/core/devio.c:1087
__fput+0x198/0x3dc fs/file_table.c:320
____fput+0x20/0x30 fs/file_table.c:353
task_work_run+0xc4/0x14c kernel/task_work.c:177
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
do_notify_resume+0x174/0x1f0 arch/arm64/kernel/signal.c:1127
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:625
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642
el0t_64_sync+0x18c/0x190
INFO: task syz-executor535:3099 blocked for more than 143 seconds.
Not tainted 6.0.0-rc4-syzkaller-17255-ga6b443748715 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor535 state:D stack: 0 pid: 3099 ppid: 3076 flags:0x00000001
Call trace:
__switch_to+0x180/0x28c arch/arm64/kernel/process.c:557
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x414/0x5a0 kernel/sched/core.c:6494
schedule+0x64/0xa4 kernel/sched/core.c:6570
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6629
__mutex_lock_common+0x788/0xca8 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
device_lock include/linux/device.h:835 [inline]
usbdev_release+0x40/0x3b8 drivers/usb/core/devio.c:1087
__fput+0x198/0x3dc fs/file_table.c:320
____fput+0x20/0x30 fs/file_table.c:353
task_work_run+0xc4/0x14c kernel/task_work.c:177
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
do_notify_resume+0x174/0x1f0 arch/arm64/kernel/signal.c:1127
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:625
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642
el0t_64_sync+0x18c/0x190
INFO: task kworker/1:1:3101 blocked for more than 143 seconds.
Not tainted 6.0.0-rc4-syzkaller-17255-ga6b443748715 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:1 state:D stack: 0 pid: 3101 ppid: 2 flags:0x00000008
Workqueue: usb_hub_wq hub_event
Call trace:
__switch_to+0x180/0x28c arch/arm64/kernel/process.c:557
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x414/0x5a0 kernel/sched/core.c:6494
schedule+0x64/0xa4 kernel/sched/core.c:6570
usb_kill_urb+0xe0/0x1c8 drivers/usb/core/urb.c:726
usb_start_wait_urb+0xf8/0x1ec drivers/usb/core/message.c:64
usb_internal_control_msg drivers/usb/core/message.c:102 [inline]
usb_control_msg+0xd8/0x17c drivers/usb/core/message.c:153
hub_port_init+0x534/0x1064 drivers/usb/core/hub.c:4825
hub_port_connect+0x528/0xe30 drivers/usb/core/hub.c:5282
hub_port_connect_change+0x3d8/0x70c drivers/usb/core/hub.c:5497
port_event+0x780/0x930 drivers/usb/core/hub.c:5653
hub_event+0x2f0/0x658 drivers/usb/core/hub.c:5735
process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
worker_thread+0x340/0x610 kernel/workqueue.c:2436
kthread+0x12c/0x158 kernel/kthread.c:376
ret_from_fork+0x10/0x20
Showing all locks held in the system:
5 locks held by kworker/0:0/6:
#0: ffff0000c0c12138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x270/0x504 kernel/workqueue.c:2262
#1: ffff80000f21bd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x29c/0x504 kernel/workqueue.c:2264
#2: ffff0000c4a87990 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#2: ffff0000c4a87990 (&dev->mutex){....}-{3:3}, at: hub_event+0x8c/0x658 drivers/usb/core/hub.c:5681
#3: ffff0000c6299508 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3103 [inline]
#3: ffff0000c6299508 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect+0x33c/0xe30 drivers/usb/core/hub.c:5249
#4: ffff0000c66b8468 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect+0x348/0xe30 drivers/usb/core/hub.c:5250
1 lock held by rcu_tasks_kthre/10:
#0: ffff80000d4634e8 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/11:
#0: ffff80000d463b38 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 kernel/rcu/tasks.h:507
5 locks held by kworker/1:0/20:
#0: ffff0000c0c12138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x270/0x504 kernel/workqueue.c:2262
#1: ffff80000f293d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x29c/0x504 kernel/workqueue.c:2264
#2: ffff0000c622f990 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#2: ffff0000c622f990 (&dev->mutex){....}-{3:3}, at: hub_event+0x8c/0x658 drivers/usb/core/hub.c:5681
#3: ffff0000c4bf1508 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3103 [inline]
#3: ffff0000c4bf1508 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect+0x33c/0xe30 drivers/usb/core/hub.c:5249
#4: ffff0000c64c9168 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect+0x348/0xe30 drivers/usb/core/hub.c:5250
1 lock held by khungtaskd/26:
#0: ffff80000d4633c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:279
5 locks held by kworker/1:2/109:
#0: ffff0000c0c12138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x270/0x504 kernel/workqueue.c:2262
#1: ffff8000126ebd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x29c/0x504 kernel/workqueue.c:2264
#2: ffff0000c5283990 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#2: ffff0000c5283990 (&dev->mutex){....}-{3:3}, at: hub_event+0x8c/0x658 drivers/usb/core/hub.c:5681
#3: ffff0000c5285508 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3103 [inline]
#3: ffff0000c5285508 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect+0x33c/0xe30 drivers/usb/core/hub.c:5249
#4: ffff0000c64d2368 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect+0x348/0xe30 drivers/usb/core/hub.c:5250
2 locks held by getty/2728:
#0: ffff0000c6f4d898 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x28/0x58 drivers/tty/tty_ldisc.c:244
#1: ffff80000f63e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x19c/0x89c drivers/tty/n_tty.c:2177
1 lock held by syz-executor535/3088:
#0: ffff0000c5283990 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#0: ffff0000c5283990 (&dev->mutex){....}-{3:3}, at: usbdev_release+0x40/0x3b8 drivers/usb/core/devio.c:1087
5 locks held by kworker/0:1/3090:
#0: ffff0000c0c12138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x270/0x504 kernel/workqueue.c:2262
#1: ffff8000127a3d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x29c/0x504 kernel/workqueue.c:2264
#2: ffff0000c6289990 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#2: ffff0000c6289990 (&dev->mutex){....}-{3:3}, at: hub_event+0x8c/0x658 drivers/usb/core/hub.c:5681
#3: ffff0000c628b508 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3103 [inline]
#3: ffff0000c628b508 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect+0x33c/0xe30 drivers/usb/core/hub.c:5249
#4: ffff0000c66b8f68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect+0x348/0xe30 drivers/usb/core/hub.c:5250
1 lock held by syz-executor535/3091:
#0: ffff0000c5283990 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#0: ffff0000c5283990 (&dev->mutex){....}-{3:3}, at: usbdev_release+0x40/0x3b8 drivers/usb/core/devio.c:1087
1 lock held by syz-executor535/3092:
#0: ffff0000c5283990 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#0: ffff0000c5283990 (&dev->mutex){....}-{3:3}, at: usbdev_release+0x40/0x3b8 drivers/usb/core/devio.c:1087
1 lock held by syz-executor535/3096:
#0: ffff0000c5283990 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#0: ffff0000c5283990 (&dev->mutex){....}-{3:3}, at: usbdev_release+0x40/0x3b8 drivers/usb/core/devio.c:1087
1 lock held by syz-executor535/3099:
#0: ffff0000c5283990 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#0: ffff0000c5283990 (&dev->mutex){....}-{3:3}, at: usbdev_release+0x40/0x3b8 drivers/usb/core/devio.c:1087
5 locks held by kworker/1:1/3101:
#0: ffff0000c0c12138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x270/0x504 kernel/workqueue.c:2262
#1: ffff800012863d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x29c/0x504 kernel/workqueue.c:2264
#2: ffff0000c62c9190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#2: ffff0000c62c9190 (&dev->mutex){....}-{3:3}, at: hub_event+0x8c/0x658 drivers/usb/core/hub.c:5681
#3: ffff0000c62cb508 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3103 [inline]
#3: ffff0000c62cb508 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect+0x33c/0xe30 drivers/usb/core/hub.c:5249
#4: ffff0000c64d2d68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect+0x348/0xe30 drivers/usb/core/hub.c:5250
1 lock held by syz-executor535/3102:
#0: ffff0000c5283990 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#0: ffff0000c5283990 (&dev->mutex){....}-{3:3}, at: usbdev_open+0xb0/0x370 drivers/usb/core/devio.c:1042
=============================================
next prev parent reply other threads:[~2022-09-19 1:54 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-16 2:47 [syzbot] INFO: task hung in hub_port_init (2) syzbot
2022-01-19 20:16 ` syzbot
2022-09-19 1:54 ` syzbot [this message]
[not found] <20220120080020.2619-1-hdanton@sina.com>
2022-01-20 8:11 ` syzbot
2022-01-20 17:28 ` Alan Stern
2022-01-20 17:55 ` syzbot
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