syzbot


INFO: task hung in port100_probe

Status: fixed on 2023/04/12 21:18
Subsystems: usb nfc
[Documentation on labels]
Reported-by: syzbot+abd2e0dafb481b621869@syzkaller.appspotmail.com
Fix commit: f80cfe2f2658 NFC: port100: fix use-after-free in port100_send_complete
First crash: 986d, last: 723d
Cause bisection: failed (error log, bisect log)
  
Fix bisection the fix commit could be any of (bisect log):
  9e723c5380c6 Merge tag 'platform-drivers-x86-v5.14-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86
  88808fbbead4 Merge tag 'nfsd-5.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
  
Discussions (5)
Title Replies (including bot) Last reply
Re: [syzbot] INFO: task hung in port100_probe 1 (1) 2022/03/12 12:44
Re: [syzbot] INFO: task hung in port100_probe 1 (1) 2022/03/12 10:36
Re: [syzbot] INFO: task hung in port100_probe 2 (4) 2022/03/11 19:32
[PATCH] NFC: port100: fix use-after-free in port100_send_complete 5 (5) 2022/03/10 04:10
[syzbot] INFO: task hung in port100_probe 13 (16) 2022/03/09 19:56
Last patch testing requests (17)
Created Duration User Patch Repo Result
2023/01/13 10:32 22m retest repro upstream OK log
2022/10/25 10:30 18m retest repro linux-next error OK
2022/10/07 06:30 19m retest repro upstream OK log
2022/10/04 16:30 17m retest repro upstream error OK
2022/09/22 07:29 19m retest repro upstream OK log
2022/09/22 05:29 19m retest repro upstream OK log
2022/03/11 19:19 12m paskripkin@gmail.com git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3bf7edc84a9eb4007dd9a0cb8878a7e1d5ec6a3b OK
2022/03/11 19:17 0m paskripkin@gmail.com git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3bf7edc84a9eb4007dd9a0cb8878a7e1d5ec6a3b3bf7edc84a9eb4007dd9a0cb8878a7e1d5ec6a3b error OK
2022/03/10 08:43 12m hdanton@sina.com upstream OK
2022/03/09 19:33 13m paskripkin@gmail.com patch upstream OK
2021/10/25 15:07 13m krzysztof.kozlowski@canonical.com https://github.com/krzk/linux.git 27078b0656947fae5133f58a81bbf9099f5fc8e7 report log
2021/10/25 15:05 15m krzysztof.kozlowski@canonical.com https://github.com/krzk/linux.git 27078b0656947fae5133f58a81bbf9099f5fc8e7 report log
2021/10/25 14:59 13m krzysztof.kozlowski@canonical.com https://github.com/krzk/linux.git n/nfc-port100-cmd-mask report log
2021/10/20 15:45 13m krzysztof.kozlowski@canonical.com https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git 60e8840126bdcb60bccef74c3f962742183c681f report log
2021/07/21 11:03 13m krzysztof.kozlowski@canonical.com https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git b1347210b01daa977ea980268927aa99198ceccc report log
2021/07/21 11:02 16m krzysztof.kozlowski@canonical.com upstream report log
2021/06/22 16:07 13m paskripkin@gmail.com patch upstream report log
Fix bisection attempts (6)
Created Duration User Patch Repo Result
2022/02/03 12:30 19m bisect fix upstream job log (2)
2022/01/03 12:57 24m bisect fix upstream job log (0) log
2021/12/04 12:29 25m bisect fix upstream job log (0) log
2021/10/26 23:29 25m bisect fix upstream job log (0) log
2021/09/26 08:10 26m bisect fix upstream job log (0) log
2021/07/18 15:33 28m bisect fix upstream job log (0) log

Sample crash report:
INFO: task kworker/1:2:142 blocked for more than 143 seconds.
      Not tainted 5.17.0-rc6-next-20220303-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:2     state:D stack:25128 pid:  142 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5043 [inline]
 __schedule+0xa94/0x4910 kernel/sched/core.c:6352
 schedule+0xd2/0x1f0 kernel/sched/core.c:6424
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common+0x2af/0x360 kernel/sched/completion.c:106
 port100_send_cmd_sync drivers/nfc/port100.c:926 [inline]
 port100_get_command_type_mask drivers/nfc/port100.c:1011 [inline]
 port100_probe+0x9ec/0x1320 drivers/nfc/port100.c:1557
 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:517 [inline]
 really_probe+0x245/0xcc0 drivers/base/dd.c:596
 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:755
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:785
 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:902
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
 __device_attach+0x228/0x4a0 drivers/base/dd.c:973
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
 device_add+0xb83/0x1e20 drivers/base/core.c:3405
 usb_set_configuration+0x101e/0x1900 drivers/usb/core/message.c:2170
 usb_generic_driver_probe+0xba/0x100 drivers/usb/core/generic.c:238
 usb_probe_device+0xd9/0x2c0 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:517 [inline]
 really_probe+0x245/0xcc0 drivers/base/dd.c:596
 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:755
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:785
 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:902
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
 __device_attach+0x228/0x4a0 drivers/base/dd.c:973
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
 device_add+0xb83/0x1e20 drivers/base/core.c:3405
 usb_new_device.cold+0x641/0x1091 drivers/usb/core/hub.c:2566
 hub_port_connect drivers/usb/core/hub.c:5363 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5507 [inline]
 port_event drivers/usb/core/hub.c:5665 [inline]
 hub_event+0x25c6/0x4680 drivers/usb/core/hub.c:5747
 process_one_work+0x996/0x1610 kernel/workqueue.c:2289
 process_scheduled_works kernel/workqueue.c:2352 [inline]
 worker_thread+0x854/0x1080 kernel/workqueue.c:2438
 kthread+0x2e9/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
INFO: task kworker/0:2:917 blocked for more than 143 seconds.
      Not tainted 5.17.0-rc6-next-20220303-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:2     state:D stack:25944 pid:  917 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5043 [inline]
 __schedule+0xa94/0x4910 kernel/sched/core.c:6352
 schedule+0xd2/0x1f0 kernel/sched/core.c:6424
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common+0x2af/0x360 kernel/sched/completion.c:106
 port100_send_cmd_sync drivers/nfc/port100.c:926 [inline]
 port100_get_command_type_mask drivers/nfc/port100.c:1011 [inline]
 port100_probe+0x9ec/0x1320 drivers/nfc/port100.c:1557
 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:517 [inline]
 really_probe+0x245/0xcc0 drivers/base/dd.c:596
 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:755
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:785
 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:902
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
 __device_attach+0x228/0x4a0 drivers/base/dd.c:973
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
 device_add+0xb83/0x1e20 drivers/base/core.c:3405
 usb_set_configuration+0x101e/0x1900 drivers/usb/core/message.c:2170
 usb_generic_driver_probe+0xba/0x100 drivers/usb/core/generic.c:238
 usb_probe_device+0xd9/0x2c0 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:517 [inline]
 really_probe+0x245/0xcc0 drivers/base/dd.c:596
 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:755
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:785
 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:902
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
 __device_attach+0x228/0x4a0 drivers/base/dd.c:973
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
 device_add+0xb83/0x1e20 drivers/base/core.c:3405
 usb_new_device.cold+0x641/0x1091 drivers/usb/core/hub.c:2566
 hub_port_connect drivers/usb/core/hub.c:5363 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5507 [inline]
 port_event drivers/usb/core/hub.c:5665 [inline]
 hub_event+0x25c6/0x4680 drivers/usb/core/hub.c:5747
 process_one_work+0x996/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e9/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
INFO: task kworker/0:3:3258 blocked for more than 144 seconds.
      Not tainted 5.17.0-rc6-next-20220303-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:3     state:D stack:26184 pid: 3258 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5043 [inline]
 __schedule+0xa94/0x4910 kernel/sched/core.c:6352
 schedule+0xd2/0x1f0 kernel/sched/core.c:6424
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common+0x2af/0x360 kernel/sched/completion.c:106
 port100_send_cmd_sync drivers/nfc/port100.c:926 [inline]
 port100_get_command_type_mask drivers/nfc/port100.c:1011 [inline]
 port100_probe+0x9ec/0x1320 drivers/nfc/port100.c:1557
 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:517 [inline]
 really_probe+0x245/0xcc0 drivers/base/dd.c:596
 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:755
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:785
 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:902
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
 __device_attach+0x228/0x4a0 drivers/base/dd.c:973
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
 device_add+0xb83/0x1e20 drivers/base/core.c:3405
 usb_set_configuration+0x101e/0x1900 drivers/usb/core/message.c:2170
 usb_generic_driver_probe+0xba/0x100 drivers/usb/core/generic.c:238
 usb_probe_device+0xd9/0x2c0 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:517 [inline]
 really_probe+0x245/0xcc0 drivers/base/dd.c:596
 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:755
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:785
 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:902
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
 __device_attach+0x228/0x4a0 drivers/base/dd.c:973
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
 device_add+0xb83/0x1e20 drivers/base/core.c:3405
 usb_new_device.cold+0x641/0x1091 drivers/usb/core/hub.c:2566
 hub_port_connect drivers/usb/core/hub.c:5363 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5507 [inline]
 port_event drivers/usb/core/hub.c:5665 [inline]
 hub_event+0x25c6/0x4680 drivers/usb/core/hub.c:5747
 process_one_work+0x996/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e9/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
INFO: task syz-executor298:3631 can't die for more than 144 seconds.
task:syz-executor298 state:D stack:27456 pid: 3631 ppid:  3627 flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5043 [inline]
 __schedule+0xa94/0x4910 kernel/sched/core.c:6352
 schedule+0xd2/0x1f0 kernel/sched/core.c:6424
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6483
 __mutex_lock_common kernel/locking/mutex.c:673 [inline]
 __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
 misc_open+0x55/0x4a0 drivers/char/misc.c:107
 chrdev_open+0x266/0x770 fs/char_dev.c:414
 do_dentry_open+0x4b9/0x1250 fs/open.c:957
 do_open fs/namei.c:3476 [inline]
 path_openat+0x1c9e/0x2940 fs/namei.c:3609
 do_filp_open+0x1aa/0x400 fs/namei.c:3636
 do_sys_openat2+0x16d/0x4d0 fs/open.c:1347
 do_sys_open fs/open.c:1363 [inline]
 __do_sys_openat fs/open.c:1379 [inline]
 __se_sys_openat fs/open.c:1374 [inline]
 __x64_sys_openat+0x13f/0x1f0 fs/open.c:1374
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff4e1474c97
RSP: 002b:00007ffcf35b1a80 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000200000c0 RCX: 00007ff4e1474c97
RDX: 0000000000000002 RSI: 00007ff4e14fa03b RDI: 00000000ffffff9c
RBP: 00007ff4e14fa03b R08: 00007ffcf35b1b68 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000036 R15: 00007ffcf35b3be0
 </TASK>
INFO: task syz-executor298:3631 blocked for more than 145 seconds.
      Not tainted 5.17.0-rc6-next-20220303-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor298 state:D stack:27456 pid: 3631 ppid:  3627 flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5043 [inline]
 __schedule+0xa94/0x4910 kernel/sched/core.c:6352
 schedule+0xd2/0x1f0 kernel/sched/core.c:6424
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6483
 __mutex_lock_common kernel/locking/mutex.c:673 [inline]
 __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
 misc_open+0x55/0x4a0 drivers/char/misc.c:107
 chrdev_open+0x266/0x770 fs/char_dev.c:414
 do_dentry_open+0x4b9/0x1250 fs/open.c:957
 do_open fs/namei.c:3476 [inline]
 path_openat+0x1c9e/0x2940 fs/namei.c:3609
 do_filp_open+0x1aa/0x400 fs/namei.c:3636
 do_sys_openat2+0x16d/0x4d0 fs/open.c:1347
 do_sys_open fs/open.c:1363 [inline]
 __do_sys_openat fs/open.c:1379 [inline]
 __se_sys_openat fs/open.c:1374 [inline]
 __x64_sys_openat+0x13f/0x1f0 fs/open.c:1374
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff4e1474c97
RSP: 002b:00007ffcf35b1a80 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000200000c0 RCX: 00007ff4e1474c97
RDX: 0000000000000002 RSI: 00007ff4e14fa03b RDI: 00000000ffffff9c
RBP: 00007ff4e14fa03b R08: 00007ffcf35b1b68 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000036 R15: 00007ffcf35b3be0
 </TASK>
INFO: task syz-executor298:3632 can't die for more than 145 seconds.
task:syz-executor298 state:D stack:28032 pid: 3632 ppid:  3629 flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5043 [inline]
 __schedule+0xa94/0x4910 kernel/sched/core.c:6352
 schedule+0xd2/0x1f0 kernel/sched/core.c:6424
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6483
 __mutex_lock_common kernel/locking/mutex.c:673 [inline]
 __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
 misc_open+0x55/0x4a0 drivers/char/misc.c:107
 chrdev_open+0x266/0x770 fs/char_dev.c:414
 do_dentry_open+0x4b9/0x1250 fs/open.c:957
 do_open fs/namei.c:3476 [inline]
 path_openat+0x1c9e/0x2940 fs/namei.c:3609
 do_filp_open+0x1aa/0x400 fs/namei.c:3636
 do_sys_openat2+0x16d/0x4d0 fs/open.c:1347
 do_sys_open fs/open.c:1363 [inline]
 __do_sys_openat fs/open.c:1379 [inline]
 __se_sys_openat fs/open.c:1374 [inline]
 __x64_sys_openat+0x13f/0x1f0 fs/open.c:1374
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff4e1474c97
RSP: 002b:00007ffcf35b1a80 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000200000c0 RCX: 00007ff4e1474c97
RDX: 0000000000000002 RSI: 00007ff4e14fa03b RDI: 00000000ffffff9c
RBP: 00007ff4e14fa03b R08: 00007ffcf35b1b68 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000036 R15: 00007ffcf35b3be0
 </TASK>
INFO: task syz-executor298:3632 blocked for more than 145 seconds.
      Not tainted 5.17.0-rc6-next-20220303-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor298 state:D stack:28032 pid: 3632 ppid:  3629 flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5043 [inline]
 __schedule+0xa94/0x4910 kernel/sched/core.c:6352
 schedule+0xd2/0x1f0 kernel/sched/core.c:6424
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6483
 __mutex_lock_common kernel/locking/mutex.c:673 [inline]
 __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
 misc_open+0x55/0x4a0 drivers/char/misc.c:107
 chrdev_open+0x266/0x770 fs/char_dev.c:414
 do_dentry_open+0x4b9/0x1250 fs/open.c:957
 do_open fs/namei.c:3476 [inline]
 path_openat+0x1c9e/0x2940 fs/namei.c:3609
 do_filp_open+0x1aa/0x400 fs/namei.c:3636
 do_sys_openat2+0x16d/0x4d0 fs/open.c:1347
 do_sys_open fs/open.c:1363 [inline]
 __do_sys_openat fs/open.c:1379 [inline]
 __se_sys_openat fs/open.c:1374 [inline]
 __x64_sys_openat+0x13f/0x1f0 fs/open.c:1374
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff4e1474c97
RSP: 002b:00007ffcf35b1a80 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000200000c0 RCX: 00007ff4e1474c97
RDX: 0000000000000002 RSI: 00007ff4e14fa03b RDI: 00000000ffffff9c
RBP: 00007ff4e14fa03b R08: 00007ffcf35b1b68 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000036 R15: 00007ffcf35b3be0
 </TASK>
INFO: task syz-executor298:3634 can't die for more than 145 seconds.
task:syz-executor298 state:D stack:28032 pid: 3634 ppid:  3628 flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5043 [inline]
 __schedule+0xa94/0x4910 kernel/sched/core.c:6352
 schedule+0xd2/0x1f0 kernel/sched/core.c:6424
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6483
 __mutex_lock_common kernel/locking/mutex.c:673 [inline]
 __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
 misc_open+0x55/0x4a0 drivers/char/misc.c:107
 chrdev_open+0x266/0x770 fs/char_dev.c:414
 do_dentry_open+0x4b9/0x1250 fs/open.c:957
 do_open fs/namei.c:3476 [inline]
 path_openat+0x1c9e/0x2940 fs/namei.c:3609
 do_filp_open+0x1aa/0x400 fs/namei.c:3636
 do_sys_openat2+0x16d/0x4d0 fs/open.c:1347
 do_sys_open fs/open.c:1363 [inline]
 __do_sys_openat fs/open.c:1379 [inline]
 __se_sys_openat fs/open.c:1374 [inline]
 __x64_sys_openat+0x13f/0x1f0 fs/open.c:1374
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff4e1474c97
RSP: 002b:00007ffcf35b1a80 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000200000c0 RCX: 00007ff4e1474c97
RDX: 0000000000000002 RSI: 00007ff4e14fa03b RDI: 00000000ffffff9c
RBP: 00007ff4e14fa03b R08: 00007ffcf35b1b68 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000036 R15: 00007ffcf35b3be0
 </TASK>
INFO: task syz-executor298:3634 blocked for more than 146 seconds.
      Not tainted 5.17.0-rc6-next-20220303-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor298 state:D stack:28032 pid: 3634 ppid:  3628 flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5043 [inline]
 __schedule+0xa94/0x4910 kernel/sched/core.c:6352
 schedule+0xd2/0x1f0 kernel/sched/core.c:6424
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6483
 __mutex_lock_common kernel/locking/mutex.c:673 [inline]
 __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
 misc_open+0x55/0x4a0 drivers/char/misc.c:107
 chrdev_open+0x266/0x770 fs/char_dev.c:414
 do_dentry_open+0x4b9/0x1250 fs/open.c:957
 do_open fs/namei.c:3476 [inline]
 path_openat+0x1c9e/0x2940 fs/namei.c:3609
 do_filp_open+0x1aa/0x400 fs/namei.c:3636
 do_sys_openat2+0x16d/0x4d0 fs/open.c:1347
 do_sys_open fs/open.c:1363 [inline]
 __do_sys_openat fs/open.c:1379 [inline]
 __se_sys_openat fs/open.c:1374 [inline]
 __x64_sys_openat+0x13f/0x1f0 fs/open.c:1374
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff4e1474c97
RSP: 002b:00007ffcf35b1a80 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000200000c0 RCX: 00007ff4e1474c97
RDX: 0000000000000002 RSI: 00007ff4e14fa03b RDI: 00000000ffffff9c
RBP: 00007ff4e14fa03b R08: 00007ffcf35b1b68 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000036 R15: 00007ffcf35b3be0
 </TASK>
INFO: task syz-executor298:3635 can't die for more than 146 seconds.
task:syz-executor298 state:D stack:28032 pid: 3635 ppid:  3630 flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5043 [inline]
 __schedule+0xa94/0x4910 kernel/sched/core.c:6352
 schedule+0xd2/0x1f0 kernel/sched/core.c:6424
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6483
 __mutex_lock_common kernel/locking/mutex.c:673 [inline]
 __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
 misc_open+0x55/0x4a0 drivers/char/misc.c:107
 chrdev_open+0x266/0x770 fs/char_dev.c:414
 do_dentry_open+0x4b9/0x1250 fs/open.c:957
 do_open fs/namei.c:3476 [inline]
 path_openat+0x1c9e/0x2940 fs/namei.c:3609
 do_filp_open+0x1aa/0x400 fs/namei.c:3636
 do_sys_openat2+0x16d/0x4d0 fs/open.c:1347
 do_sys_open fs/open.c:1363 [inline]
 __do_sys_openat fs/open.c:1379 [inline]
 __se_sys_openat fs/open.c:1374 [inline]
 __x64_sys_openat+0x13f/0x1f0 fs/open.c:1374
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff4e1474c97
RSP: 002b:00007ffcf35b1a80 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000200000c0 RCX: 00007ff4e1474c97
RDX: 0000000000000002 RSI: 00007ff4e14fa03b RDI: 00000000ffffff9c
RBP: 00007ff4e14fa03b R08: 00007ffcf35b1b68 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000036 R15: 00007ffcf35b3be0
 </TASK>
INFO: task syz-executor298:3635 blocked for more than 146 seconds.
      Not tainted 5.17.0-rc6-next-20220303-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor298 state:D stack:28032 pid: 3635 ppid:  3630 flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5043 [inline]
 __schedule+0xa94/0x4910 kernel/sched/core.c:6352
 schedule+0xd2/0x1f0 kernel/sched/core.c:6424
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6483
 __mutex_lock_common kernel/locking/mutex.c:673 [inline]
 __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
 misc_open+0x55/0x4a0 drivers/char/misc.c:107
 chrdev_open+0x266/0x770 fs/char_dev.c:414
 do_dentry_open+0x4b9/0x1250 fs/open.c:957
 do_open fs/namei.c:3476 [inline]
 path_openat+0x1c9e/0x2940 fs/namei.c:3609
 do_filp_open+0x1aa/0x400 fs/namei.c:3636
 do_sys_openat2+0x16d/0x4d0 fs/open.c:1347
 do_sys_open fs/open.c:1363 [inline]
 __do_sys_openat fs/open.c:1379 [inline]
 __se_sys_openat fs/open.c:1374 [inline]
 __x64_sys_openat+0x13f/0x1f0 fs/open.c:1374
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff4e1474c97
RSP: 002b:00007ffcf35b1a80 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000200000c0 RCX: 00007ff4e1474c97
RDX: 0000000000000002 RSI: 00007ff4e14fa03b RDI: 00000000ffffff9c
RBP: 00007ff4e14fa03b R08: 00007ffcf35b1b68 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000036 R15: 00007ffcf35b3be0
 </TASK>
INFO: task kworker/0:1:3639 blocked for more than 147 seconds.
      Not tainted 5.17.0-rc6-next-20220303-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:1     state:D stack:26008 pid: 3639 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5043 [inline]
 __schedule+0xa94/0x4910 kernel/sched/core.c:6352
 schedule+0xd2/0x1f0 kernel/sched/core.c:6424
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common+0x2af/0x360 kernel/sched/completion.c:106
 port100_send_cmd_sync drivers/nfc/port100.c:926 [inline]
 port100_get_command_type_mask drivers/nfc/port100.c:1011 [inline]
 port100_probe+0x9ec/0x1320 drivers/nfc/port100.c:1557
 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:517 [inline]
 really_probe+0x245/0xcc0 drivers/base/dd.c:596
 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:755
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:785
 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:902
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
 __device_attach+0x228/0x4a0 drivers/base/dd.c:973
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
 device_add+0xb83/0x1e20 drivers/base/core.c:3405
 usb_set_configuration+0x101e/0x1900 drivers/usb/core/message.c:2170
 usb_generic_driver_probe+0xba/0x100 drivers/usb/core/generic.c:238
 usb_probe_device+0xd9/0x2c0 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:517 [inline]
 really_probe+0x245/0xcc0 drivers/base/dd.c:596
 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:755
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:785
 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:902
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
 __device_attach+0x228/0x4a0 drivers/base/dd.c:973
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
 device_add+0xb83/0x1e20 drivers/base/core.c:3405
 usb_new_device.cold+0x641/0x1091 drivers/usb/core/hub.c:2566
 hub_port_connect drivers/usb/core/hub.c:5363 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5507 [inline]
 port_event drivers/usb/core/hub.c:5665 [inline]
 hub_event+0x25c6/0x4680 drivers/usb/core/hub.c:5747
 process_one_work+0x996/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e9/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
INFO: task kworker/0:4:3640 blocked for more than 147 seconds.
      Not tainted 5.17.0-rc6-next-20220303-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:4     state:D stack:26400 pid: 3640 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5043 [inline]
 __schedule+0xa94/0x4910 kernel/sched/core.c:6352
 schedule+0xd2/0x1f0 kernel/sched/core.c:6424
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common+0x2af/0x360 kernel/sched/completion.c:106
 port100_send_cmd_sync drivers/nfc/port100.c:926 [inline]
 port100_get_command_type_mask drivers/nfc/port100.c:1011 [inline]
 port100_probe+0x9ec/0x1320 drivers/nfc/port100.c:1557
 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:517 [inline]
 really_probe+0x245/0xcc0 drivers/base/dd.c:596
 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:755
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:785
 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:902
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
 __device_attach+0x228/0x4a0 drivers/base/dd.c:973
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
 device_add+0xb83/0x1e20 drivers/base/core.c:3405
 usb_set_configuration+0x101e/0x1900 drivers/usb/core/message.c:2170
 usb_generic_driver_probe+0xba/0x100 drivers/usb/core/generic.c:238
 usb_probe_device+0xd9/0x2c0 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:517 [inline]
 really_probe+0x245/0xcc0 drivers/base/dd.c:596
 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:755
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:785
 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:902
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
 __device_attach+0x228/0x4a0 drivers/base/dd.c:973
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
 device_add+0xb83/0x1e20 drivers/base/core.c:3405
 usb_new_device.cold+0x641/0x1091 drivers/usb/core/hub.c:2566
 hub_port_connect drivers/usb/core/hub.c:5363 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5507 [inline]
 port_event drivers/usb/core/hub.c:5665 [inline]
 hub_event+0x25c6/0x4680 drivers/usb/core/hub.c:5747
 process_one_work+0x996/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e9/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
INFO: task syz-executor298:3649 can't die for more than 148 seconds.
task:syz-executor298 state:D stack:28032 pid: 3649 ppid:  3625 flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5043 [inline]
 __schedule+0xa94/0x4910 kernel/sched/core.c:6352
 schedule+0xd2/0x1f0 kernel/sched/core.c:6424
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6483
 __mutex_lock_common kernel/locking/mutex.c:673 [inline]
 __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
 misc_open+0x55/0x4a0 drivers/char/misc.c:107
 chrdev_open+0x266/0x770 fs/char_dev.c:414
 do_dentry_open+0x4b9/0x1250 fs/open.c:957
 do_open fs/namei.c:3476 [inline]
 path_openat+0x1c9e/0x2940 fs/namei.c:3609
 do_filp_open+0x1aa/0x400 fs/namei.c:3636
 do_sys_openat2+0x16d/0x4d0 fs/open.c:1347
 do_sys_open fs/open.c:1363 [inline]
 __do_sys_openat fs/open.c:1379 [inline]
 __se_sys_openat fs/open.c:1374 [inline]
 __x64_sys_openat+0x13f/0x1f0 fs/open.c:1374
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff4e1474c97
RSP: 002b:00007ffcf35b1a80 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000200000c0 RCX: 00007ff4e1474c97
RDX: 0000000000000002 RSI: 00007ff4e14fa03b RDI: 00000000ffffff9c
RBP: 00007ff4e14fa03b R08: 00007ffcf35b1b68 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffcf35b3bdc R14: 0000000000000036 R15: 00007ffcf35b3be0
 </TASK>
INFO: task syz-executor298:3649 blocked for more than 148 seconds.
      Not tainted 5.17.0-rc6-next-20220303-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor298 state:D stack:28032 pid: 3649 ppid:  3625 flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5043 [inline]
 __schedule+0xa94/0x4910 kernel/sched/core.c:6352
 schedule+0xd2/0x1f0 kernel/sched/core.c:6424
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6483
 __mutex_lock_common kernel/locking/mutex.c:673 [inline]
 __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
 misc_open+0x55/0x4a0 drivers/char/misc.c:107
 chrdev_open+0x266/0x770 fs/char_dev.c:414
 do_dentry_open+0x4b9/0x1250 fs/open.c:957
 do_open fs/namei.c:3476 [inline]
 path_openat+0x1c9e/0x2940 fs/namei.c:3609
 do_filp_open+0x1aa/0x400 fs/namei.c:3636
 do_sys_openat2+0x16d/0x4d0 fs/open.c:1347
 do_sys_open fs/open.c:1363 [inline]
 __do_sys_openat fs/open.c:1379 [inline]
 __se_sys_openat fs/open.c:1374 [inline]
 __x64_sys_openat+0x13f/0x1f0 fs/open.c:1374
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff4e1474c97
RSP: 002b:00007ffcf35b1a80 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000200000c0 RCX: 00007ff4e1474c97
RDX: 0000000000000002 RSI: 00007ff4e14fa03b RDI: 00000000ffffff9c
RBP: 00007ff4e14fa03b R08: 00007ffcf35b1b68 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffcf35b3bdc R14: 0000000000000036 R15: 00007ffcf35b3be0
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/28:
 #0: ffffffff8bd858e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6498
5 locks held by kworker/1:2/142:
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
 #1: ffffc900020bfda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
 #2: ffff88801ec7d220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #2: ffff88801ec7d220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4680 drivers/usb/core/hub.c:5693
 #3: ffff888078b63220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #3: ffff888078b63220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:948
 #4: ffff888078b641a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #4: ffff888078b641a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:948
5 locks held by kworker/0:2/917:
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
 #1: ffffc90004a5fda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
 #2: ffff88801ed53220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #2: ffff88801ed53220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4680 drivers/usb/core/hub.c:5693
 #3: ffff888148b9e220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #3: ffff888148b9e220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:948
 #4: ffff88814bd1f1a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #4: ffff88814bd1f1a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:948
5 locks held by kworker/0:3/3258:
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
 #1: ffffc90002f9fda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
 #2: ffff888148ee3220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #2: ffff888148ee3220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4680 drivers/usb/core/hub.c:5693
 #3: ffff88814bc76220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #3: ffff88814bc76220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:948
 #4: ffff88814bd851a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #4: ffff88814bd851a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:948
2 locks held by getty/3278:
 #0: ffff888024631098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
 #1: ffffc90002e662e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2075
1 lock held by syz-executor298/3631:
 #0: ffffffff8c7fa668 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x55/0x4a0 drivers/char/misc.c:107
1 lock held by syz-executor298/3632:
 #0: ffffffff8c7fa668 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x55/0x4a0 drivers/char/misc.c:107
1 lock held by syz-executor298/3634:
 #0: ffffffff8c7fa668 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x55/0x4a0 drivers/char/misc.c:107
1 lock held by syz-executor298/3635:
 #0: ffffffff8c7fa668 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x55/0x4a0 drivers/char/misc.c:107
5 locks held by kworker/0:1/3639:
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
 #1: ffffc90003c1fda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
 #2: ffff888148efb220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #2: ffff888148efb220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4680 drivers/usb/core/hub.c:5693
 #3: ffff888148bcd220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #3: ffff888148bcd220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:948
 #4: ffff88814bd781a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #4: ffff88814bd781a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:948
5 locks held by kworker/0:4/3640:
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
 #0: ffff88801692ed38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
 #1: ffffc90003c2fda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
 #2: ffff888148ed3220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #2: ffff888148ed3220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4680 drivers/usb/core/hub.c:5693
 #3: ffff888148bcc220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #3: ffff888148bcc220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:948
 #4: ffff88814bd821a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #4: ffff88814bd821a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:948
1 lock held by syz-executor298/3649:
 #0: ffffffff8c7fa668 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x55/0x4a0 drivers/char/misc.c:107
2 locks held by syz-executor298/3650:
 #0: ffffffff8c7fa668 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x55/0x4a0 drivers/char/misc.c:107
 #1: ffffffff8bc50a28 (system_transition_mutex){+.+.}-{3:3}, at: snapshot_open+0x3b/0x2a0 kernel/power/user.c:54

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

NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 5.17.0-rc6-next-20220303-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:256 [inline]
 watchdog+0xcb7/0xed0 kernel/hung_task.c:413
 kthread+0x2e9/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 980 Comm: kworker/u4:4 Not tainted 5.17.0-rc6-next-20220303-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:lookup_object lib/debugobjects.c:196 [inline]
RIP: 0010:debug_object_activate+0x182/0x3e0 lib/debugobjects.c:663
Code: 00 00 00 00 fc ff df 48 8d 7d 18 83 c3 01 48 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 c6 01 00 00 4c 3b 65 18 0f 84 bf 00 00 00 <48> 89 e8 48 c1 e8 03 42 80 3c 28 00 0f 85 c6 01 00 00 48 8b 6d 00
RSP: 0018:ffffc90004cff9d0 EFLAGS: 00000006
RAX: 1ffff1100391e2b9 RBX: 000000000000000a RCX: ffffffff815e3600
RDX: 1ffffffff20ebbdc RSI: 0000000000000006 RDI: ffff88801c8f15c8
RBP: ffff88801c8f15b0 R08: ffffffff9075ded0 R09: 0000000000000003
R10: fffff5200099ff28 R11: 0000000000000001 R12: ffffffff8bed8588
R13: dffffc0000000000 R14: 1ffff9200099ff3c R15: ffffffff89ce5c00
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d0efeb5050 CR3: 000000000ba8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 debug_timer_activate kernel/time/timer.c:729 [inline]
 __mod_timer+0x77d/0xe30 kernel/time/timer.c:1050
 __queue_delayed_work+0x1a7/0x270 kernel/workqueue.c:1676
 queue_delayed_work_on+0x105/0x120 kernel/workqueue.c:1701
 queue_delayed_work include/linux/workqueue.h:518 [inline]
 toggle_allocation_gate mm/kfence/core.c:751 [inline]
 toggle_allocation_gate+0x1c8/0x390 mm/kfence/core.c:727
 process_one_work+0x996/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e9/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
----------------
Code disassembly (best guess), 6 bytes skipped:
   0:	df 48 8d             	fisttps -0x73(%rax)
   3:	7d 18                	jge    0x1d
   5:	83 c3 01             	add    $0x1,%ebx
   8:	48 89 f8             	mov    %rdi,%rax
   b:	48 c1 e8 03          	shr    $0x3,%rax
   f:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
  14:	0f 85 c6 01 00 00    	jne    0x1e0
  1a:	4c 3b 65 18          	cmp    0x18(%rbp),%r12
  1e:	0f 84 bf 00 00 00    	je     0xe3
* 24:	48 89 e8             	mov    %rbp,%rax <-- trapping instruction
  27:	48 c1 e8 03          	shr    $0x3,%rax
  2b:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
  30:	0f 85 c6 01 00 00    	jne    0x1fc
  36:	48 8b 6d 00          	mov    0x0(%rbp),%rbp

Crashes (10):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/03/08 01:12 linux-next 91265a6da44d 7bdd8b2c .config console log report syz C ci-upstream-linux-next-kasan-gce-root INFO: task hung in port100_probe
2022/02/27 23:01 upstream 2293be58d6a1 45a13a73 .config console log report syz C ci-upstream-kasan-gce-smack-root INFO: task hung in port100_probe
2022/02/12 05:55 upstream 1d41d2e82623 8b9ca619 .config console log report syz C ci-upstream-kasan-gce-root INFO: task hung in port100_probe
2021/08/11 12:03 upstream 9e723c5380c6 6972b106 .config console log report syz C ci-upstream-kasan-gce INFO: task hung in port100_probe
2021/06/18 15:32 upstream fd0aa1a4567d aba2b2fb .config console log report syz C ci-upstream-kasan-gce INFO: task hung in port100_probe
2021/11/04 12:29 upstream ce840177930f 4c1be0be .config console log report info ci-upstream-kasan-gce-root INFO: task hung in port100_probe
2021/08/27 08:10 upstream 1a6d80ff2419 b318694d .config console log report info ci-upstream-kasan-gce INFO: task hung in port100_probe
2021/08/20 14:52 upstream d992fe5318d8 b599f2fc .config console log report info ci-upstream-kasan-gce-root INFO: task hung in port100_probe
2021/06/18 10:37 upstream fd0aa1a4567d aba2b2fb .config console log report info ci-upstream-kasan-gce INFO: task hung in port100_probe
2021/06/18 02:26 upstream 70585216fe77 aba2b2fb .config console log report info ci-upstream-kasan-gce INFO: task hung in port100_probe
* Struck through repros no longer work on HEAD.