syzbot


INFO: task hung in usbdev_open (2)

Status: auto-closed as invalid on 2022/03/21 09:54
Reported-by: syzbot+aeb1d8d01e24f20b550f@syzkaller.appspotmail.com
First crash: 886d, last: 879d
Similar bugs (11)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: task hung in usbdev_open (3) 1 480d 480d 0/1 upstream: reported on 2022/12/25 16:08
upstream INFO: task hung in usbdev_open (2) usb C error 622 5d00h 1206d 0/26 upstream: reported C repro on 2020/12/29 11:48
linux-6.1 INFO: task hung in usbdev_open origin:lts-only C done 3 326d 383d 3/3 fixed on 2023/06/28 17:15
linux-5.15 INFO: task hung in usbdev_open origin:lts-only C error 17 9d00h 383d 0/3 upstream: reported C repro on 2023/04/01 11:58
linux-6.1 INFO: task hung in usbdev_open (2) 1 129d 129d 0/3 auto-obsoleted due to no activity on 2024/03/20 05:29
linux-4.19 INFO: task hung in usbdev_open 6 1179d 1265d 0/1 auto-closed as invalid on 2021/05/25 14:21
linux-4.14 INFO: task hung in usbdev_open 7 1138d 1277d 0/1 auto-closed as invalid on 2021/07/05 05:59
upstream INFO: task hung in usbdev_open usb 2 1668d 1668d 0/26 auto-closed as invalid on 2019/12/23 20:14
linux-6.1 INFO: task hung in usbdev_open (3) 1 18d 18d 0/3 upstream: reported on 2024/03/31 03:03
linux-4.14 INFO: task hung in usbdev_open (2) 1 430d 430d 0/1 upstream: reported on 2023/02/13 07:50
upstream INFO: task can't die in usbdev_open usb 4 1172d 1284d 0/26 auto-closed as invalid on 2021/04/02 18:49

Sample crash report:
ieee802154 phy0 wpan0: encryption failed: -22
ieee802154 phy1 wpan1: encryption failed: -22
Bluetooth: hci6: command 0x0406 tx timeout
ieee802154 phy0 wpan0: encryption failed: -22
ieee802154 phy1 wpan1: encryption failed: -22
INFO: task syz-executor.3:15224 blocked for more than 140 seconds.
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D28400 15224   8124 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1016 [inline]
 __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078
 device_lock include/linux/device.h:1174 [inline]
 usbdev_open+0x152/0x7f0 drivers/usb/core/devio.c:1007
 chrdev_open+0x266/0x770 fs/char_dev.c:423
 do_dentry_open+0x4aa/0x1160 fs/open.c:796
 do_last fs/namei.c:3421 [inline]
 path_openat+0x793/0x2df0 fs/namei.c:3537
 do_filp_open+0x18c/0x3f0 fs/namei.c:3567
 do_sys_open+0x3b3/0x520 fs/open.c:1085
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f62f172da04
Code: Bad RIP value.
RSP: 002b:00007f62eecefcc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00007f62f172da04
RDX: 0000000000000001 RSI: 00007f62eecefd60 RDI: 00000000ffffff9c
RBP: 00007f62eecefd60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffd397b4c2f R14: 00007f62eecf0300 R15: 0000000000022000
INFO: task syz-executor.3:15231 blocked for more than 140 seconds.
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D29128 15231   8124 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1016 [inline]
 __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078
 device_lock include/linux/device.h:1174 [inline]
 usbdev_open+0x152/0x7f0 drivers/usb/core/devio.c:1007
 chrdev_open+0x266/0x770 fs/char_dev.c:423
 do_dentry_open+0x4aa/0x1160 fs/open.c:796
 do_last fs/namei.c:3421 [inline]
 path_openat+0x793/0x2df0 fs/namei.c:3537
 do_filp_open+0x18c/0x3f0 fs/namei.c:3567
 do_sys_open+0x3b3/0x520 fs/open.c:1085
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f62f172da04
Code: Bad RIP value.
RSP: 002b:00007f62eeccecc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00007f62f172da04
RDX: 0000000000000001 RSI: 00007f62eecced60 RDI: 00000000ffffff9c
RBP: 00007f62eecced60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffd397b4c2f R14: 00007f62eeccf300 R15: 0000000000022000
INFO: task syz-executor.3:15233 blocked for more than 140 seconds.
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D29128 15233   8124 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1016 [inline]
 __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078
 device_lock include/linux/device.h:1174 [inline]
 usbdev_open+0x152/0x7f0 drivers/usb/core/devio.c:1007
 chrdev_open+0x266/0x770 fs/char_dev.c:423
 do_dentry_open+0x4aa/0x1160 fs/open.c:796
 do_last fs/namei.c:3421 [inline]
 path_openat+0x793/0x2df0 fs/namei.c:3537
 do_filp_open+0x18c/0x3f0 fs/namei.c:3567
 do_sys_open+0x3b3/0x520 fs/open.c:1085
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f62f172da04
Code: Bad RIP value.
RSP: 002b:00007f62eecadcc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00007f62f172da04
RDX: 0000000000000001 RSI: 00007f62eecadd60 RDI: 00000000ffffff9c
RBP: 00007f62eecadd60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffd397b4c2f R14: 00007f62eecae300 R15: 0000000000022000
INFO: task syz-executor.3:15273 blocked for more than 140 seconds.
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D29128 15273   8124 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1016 [inline]
 __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078
 device_lock include/linux/device.h:1174 [inline]
 usbdev_open+0x152/0x7f0 drivers/usb/core/devio.c:1007
 chrdev_open+0x266/0x770 fs/char_dev.c:423
 do_dentry_open+0x4aa/0x1160 fs/open.c:796
 do_last fs/namei.c:3421 [inline]
 path_openat+0x793/0x2df0 fs/namei.c:3537
 do_filp_open+0x18c/0x3f0 fs/namei.c:3567
 do_sys_open+0x3b3/0x520 fs/open.c:1085
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f62f172da04
Code: Bad RIP value.
RSP: 002b:00007f62eec6bcc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00007f62f172da04
RDX: 0000000000000001 RSI: 00007f62eec6bd60 RDI: 00000000ffffff9c
RBP: 00007f62eec6bd60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffd397b4c2f R14: 00007f62eec6c300 R15: 0000000000022000
INFO: task syz-executor.3:15278 blocked for more than 140 seconds.
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D29128 15278   8124 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1016 [inline]
 __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078
 device_lock include/linux/device.h:1174 [inline]
 usbdev_open+0x152/0x7f0 drivers/usb/core/devio.c:1007
 chrdev_open+0x266/0x770 fs/char_dev.c:423
 do_dentry_open+0x4aa/0x1160 fs/open.c:796
 do_last fs/namei.c:3421 [inline]
 path_openat+0x793/0x2df0 fs/namei.c:3537
 do_filp_open+0x18c/0x3f0 fs/namei.c:3567
 do_sys_open+0x3b3/0x520 fs/open.c:1085
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f62f172da04
Code: Bad RIP value.
RSP: 002b:00007f62eec4acc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00007f62f172da04
RDX: 0000000000000001 RSI: 00007f62eec4ad60 RDI: 00000000ffffff9c
RBP: 00007f62eec4ad60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffd397b4c2f R14: 00007f62eec4b300 R15: 0000000000022000
INFO: task syz-executor.3:15284 blocked for more than 140 seconds.
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D29128 15284   8124 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1016 [inline]
 __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078
 device_lock include/linux/device.h:1174 [inline]
 usbdev_open+0x152/0x7f0 drivers/usb/core/devio.c:1007
 chrdev_open+0x266/0x770 fs/char_dev.c:423
 do_dentry_open+0x4aa/0x1160 fs/open.c:796
 do_last fs/namei.c:3421 [inline]
 path_openat+0x793/0x2df0 fs/namei.c:3537
 do_filp_open+0x18c/0x3f0 fs/namei.c:3567
 do_sys_open+0x3b3/0x520 fs/open.c:1085
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f62f172da04
Code: Bad RIP value.
RSP: 002b:00007f62eec29cc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00007f62f172da04
RDX: 0000000000000001 RSI: 00007f62eec29d60 RDI: 00000000ffffff9c
RBP: 00007f62eec29d60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffd397b4c2f R14: 00007f62eec2a300 R15: 0000000000022000

Showing all locks held in the system:
1 lock held by khungtaskd/1570:
 #0: 0000000058c1bbe1 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441
1 lock held by in:imklog/7795:
5 locks held by kworker/0:3/8623:
 #0: 00000000cda537cd ((wq_completion)"usb_hub_wq"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124
 #1: 00000000330cf8f9 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128
 #2: 00000000e70cf595 (&dev->mutex){....}, at: device_lock include/linux/device.h:1174 [inline]
 #2: 00000000e70cf595 (&dev->mutex){....}, at: hub_event+0x11e/0x44a0 drivers/usb/core/hub.c:5387
 #3: 000000006e019922 (&port_dev->status_lock){+.+.}, at: usb_lock_port drivers/usb/core/hub.c:2983 [inline]
 #3: 000000006e019922 (&port_dev->status_lock){+.+.}, at: hub_port_connect drivers/usb/core/hub.c:5069 [inline]
 #3: 000000006e019922 (&port_dev->status_lock){+.+.}, at: hub_port_connect_change drivers/usb/core/hub.c:5253 [inline]
 #3: 000000006e019922 (&port_dev->status_lock){+.+.}, at: port_event drivers/usb/core/hub.c:5361 [inline]
 #3: 000000006e019922 (&port_dev->status_lock){+.+.}, at: hub_event+0x1cb8/0x44a0 drivers/usb/core/hub.c:5441
 #4: 000000002ad5e64a (hcd->address0_mutex){+.+.}, at: hub_port_init+0x1b9/0x3120 drivers/usb/core/hub.c:4578
3 locks held by kworker/u4:7/9597:
 #0: 00000000a42e19cb (&rq->lock){-.-.}, at: idle_balance kernel/sched/fair.c:9702 [inline]
 #0: 00000000a42e19cb (&rq->lock){-.-.}, at: pick_next_task_fair+0x556/0x1570 kernel/sched/fair.c:6841
 #1: 0000000058c1bbe1 (rcu_read_lock){....}, at: cpu_of kernel/sched/sched.h:923 [inline]
 #1: 0000000058c1bbe1 (rcu_read_lock){....}, at: __update_idle_core+0x39/0x3e0 kernel/sched/fair.c:6057
 #2: 0000000058c1bbe1 (rcu_read_lock){....}, at: batadv_nc_process_nc_paths.part.0+0xb1/0x3d0 net/batman-adv/network-coding.c:695
1 lock held by syz-executor.3/15224:
 #0: 00000000e70cf595 (&dev->mutex){....}, at: device_lock include/linux/device.h:1174 [inline]
 #0: 00000000e70cf595 (&dev->mutex){....}, at: usbdev_open+0x152/0x7f0 drivers/usb/core/devio.c:1007
1 lock held by syz-executor.3/15231:
 #0: 00000000e70cf595 (&dev->mutex){....}, at: device_lock include/linux/device.h:1174 [inline]
 #0: 00000000e70cf595 (&dev->mutex){....}, at: usbdev_open+0x152/0x7f0 drivers/usb/core/devio.c:1007
1 lock held by syz-executor.3/15233:
 #0: 00000000e70cf595 (&dev->mutex){....}, at: device_lock include/linux/device.h:1174 [inline]
 #0: 00000000e70cf595 (&dev->mutex){....}, at: usbdev_open+0x152/0x7f0 drivers/usb/core/devio.c:1007
1 lock held by syz-executor.3/15273:
 #0: 00000000e70cf595 (&dev->mutex){....}, at: device_lock include/linux/device.h:1174 [inline]
 #0: 00000000e70cf595 (&dev->mutex){....}, at: usbdev_open+0x152/0x7f0 drivers/usb/core/devio.c:1007
1 lock held by syz-executor.3/15278:
 #0: 00000000e70cf595 (&dev->mutex){....}, at: device_lock include/linux/device.h:1174 [inline]
 #0: 00000000e70cf595 (&dev->mutex){....}, at: usbdev_open+0x152/0x7f0 drivers/usb/core/devio.c:1007
1 lock held by syz-executor.3/15284:
 #0: 00000000e70cf595 (&dev->mutex){....}, at: device_lock include/linux/device.h:1174 [inline]
 #0: 00000000e70cf595 (&dev->mutex){....}, at: usbdev_open+0x152/0x7f0 drivers/usb/core/devio.c:1007

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
 watchdog+0x991/0xe60 kernel/hung_task.c:287
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4692 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:seccomp_run_filters+0xe6/0x590 kernel/seccomp.c:211
Code: 14 01 00 00 48 8b 44 24 08 41 bd 00 00 ff 7f 49 bc 00 00 00 00 00 fc ff df 48 c1 e8 03 4c 01 e0 48 89 44 24 10 e8 3a cc ff ff <48> 8d 7b 10 48 89 f8 48 c1 e8 03 42 80 3c 20 00 0f 85 c9 03 00 00
RSP: 0018:ffff8880a0e2fbc0 EFLAGS: 00000293
RAX: ffff8880a0e24580 RBX: ffff8880a12a0640 RCX: ffffffff8162b98c
RDX: 0000000000000000 RSI: ffffffff8162b936 RDI: ffff8880a12a0588
RBP: 000000007fff0000 R08: 0000000000000000 R09: 000000007fff0000
R10: 0000000000000004 R11: 0000000000000000 R12: dffffc0000000000
R13: 000000007fff0000 R14: 000000007fff0000 R15: 000000007fff0000
FS:  00007fda091a78c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fda0670a020 CR3: 00000000a10d2000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __seccomp_filter+0x93/0xca0 kernel/seccomp.c:667
 __secure_computing+0xfc/0x360 kernel/seccomp.c:796
 syscall_trace_enter+0x563/0xd60 arch/x86/entry/common.c:121
 do_syscall_64+0x486/0x620 arch/x86/entry/common.c:283
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fda084629c7
Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffff13abb98 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007ffff13aebc0 RCX: 00007fda084629c7
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000055cc4e12b9a3
RBP: 00007ffff13abce0 R08: 000055cc4e1213e5 R09: 0000000000000018
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 000055cc4fb998a0 R15: 00007ffff13ac1d0
----------------
Code disassembly (best guess):
   0:	14 01                	adc    $0x1,%al
   2:	00 00                	add    %al,(%rax)
   4:	48 8b 44 24 08       	mov    0x8(%rsp),%rax
   9:	41 bd 00 00 ff 7f    	mov    $0x7fff0000,%r13d
   f:	49 bc 00 00 00 00 00 	movabs $0xdffffc0000000000,%r12
  16:	fc ff df
  19:	48 c1 e8 03          	shr    $0x3,%rax
  1d:	4c 01 e0             	add    %r12,%rax
  20:	48 89 44 24 10       	mov    %rax,0x10(%rsp)
  25:	e8 3a cc ff ff       	callq  0xffffcc64
* 2a:	48 8d 7b 10          	lea    0x10(%rbx),%rdi <-- trapping instruction
  2e:	48 89 f8             	mov    %rdi,%rax
  31:	48 c1 e8 03          	shr    $0x3,%rax
  35:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  3a:	0f 85 c9 03 00 00    	jne    0x409

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/11/21 09:54 linux-4.19.y 3f8a27f9e27b 4eb20a4e .config console log report info ci2-linux-4-19 INFO: task hung in usbdev_open
2021/11/14 03:46 linux-4.19.y 3f8a27f9e27b 75b04091 .config console log report info ci2-linux-4-19 INFO: task hung in usbdev_open
* Struck through repros no longer work on HEAD.