INFO: task hung in usbdev_release

Status: auto-obsoleted due to no activity on 2026/02/03 09:29
Reported-by: syzbot+0637251ee98a851fba95@syzkaller.appspotmail.com
First crash: 317d, last: 317d
▶ ▼ Similar bugs (8)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in usbdev_release (2) prio:high usb 1 syz, C error error 136 9d20h 1136d 0/29 upstream: reported C repro on 2023/08/09 15:47
upstream INFO: task hung in usbdev_release usb 1 20 1734d 2141d 0/29 closed as invalid on 2022/02/07 19:19
linux-5.15 INFO: task hung in usbdev_release 1 1 934d 934d 0/3 auto-obsoleted due to no activity on 2024/06/05 22:03
linux-4.19 INFO: task hung in usbdev_release 1 1 2154d 2154d 0/1 auto-closed as invalid on 2021/02/21 22:17
linux-6.1 INFO: task hung in usbdev_release 1 1 1282d 1282d 0/3 auto-obsoleted due to no activity on 2023/07/13 23:24
linux-4.19 INFO: task hung in usbdev_release (2) 1 10 1410d 1875d 0/1 auto-obsoleted due to no activity on 2023/03/08 04:55
linux-4.14 INFO: task hung in usbdev_release 1 2 2090d 2153d 0/1 auto-closed as invalid on 2021/04/27 06:36
linux-6.1 INFO: task hung in usbdev_release (2) origin:upstream 1 syz, C error 9 435d 1097d 0/3 upstream: reported C repro on 2023/09/16 19:39

Sample crash report:
INFO: task syz.0.2484:7697 blocked for more than 122 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.2484      state:D stack:0     pid:7697  tgid:7697  ppid:5566   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5945 [inline]
 __schedule+0x1322/0x1df0 kernel/sched/core.c:7791
 __schedule_loop kernel/sched/core.c:7872 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:7887
 schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:7944
 __mutex_lock_common kernel/locking/mutex.c:707 [inline]
 __mutex_lock+0x81e/0x1b50 kernel/locking/mutex.c:803
 __mutex_lock_slowpath+0xe/0x20 kernel/locking/mutex.c:1134
 mutex_lock+0x102/0x1c0 kernel/locking/mutex.c:285
 device_lock include/linux/device.h:908 [inline]
 usbdev_release+0x85/0x730 drivers/usb/core/devio.c:1096
 __fput+0x1fb/0xa00 fs/file_table.c:429
 ____fput+0x20/0x30 fs/file_table.c:457
 task_work_run+0x1e0/0x250 kernel/task_work.c:240
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0x9bc/0x2630 kernel/exit.c:953
 do_group_exit+0x22a/0x300 kernel/exit.c:1095
 get_signal+0x139d/0x14f0 kernel/signal.c:2933
 arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f15fabc1f85
RSP: 002b:00007f15fb9bef80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007f15fade5fa0 RCX: 00007f15fabc1f85
RDX: 00007f15fb9befc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f15fac11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f15fade6038 R14: 00007f15fade5fa0 R15: 00007fffe0677a08
 </TASK>
INFO: task syz.4.3105:9508 blocked for more than 123 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.3105      state:D stack:0     pid:9508  tgid:9508  ppid:8664   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5945 [inline]
 __schedule+0x1322/0x1df0 kernel/sched/core.c:7791
 __schedule_loop kernel/sched/core.c:7872 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:7887
 schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:7944
 __mutex_lock_common kernel/locking/mutex.c:707 [inline]
 __mutex_lock+0x81e/0x1b50 kernel/locking/mutex.c:803
 __mutex_lock_slowpath+0xe/0x20 kernel/locking/mutex.c:1134
 mutex_lock+0x102/0x1c0 kernel/locking/mutex.c:285
 device_lock include/linux/device.h:908 [inline]
 usbdev_release+0x85/0x730 drivers/usb/core/devio.c:1096
 __fput+0x1fb/0xa00 fs/file_table.c:429
 ____fput+0x20/0x30 fs/file_table.c:457
 task_work_run+0x1e0/0x250 kernel/task_work.c:240
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0x9bc/0x2630 kernel/exit.c:953
 do_group_exit+0x22a/0x300 kernel/exit.c:1095
 get_signal+0x139d/0x14f0 kernel/signal.c:2933
 arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fdaff5c1f85
RSP: 002b:00007fdb004e0f80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007fdaff7e5fa0 RCX: 00007fdaff5c1f85
RDX: 00007fdb004e0fc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fdaff611f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fdaff7e6038 R14: 00007fdaff7e5fa0 R15: 00007ffdac9165e8
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 0b5ffdee5fcd2f7749818d1ff954e9c21353764e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120
 dump_stack+0x19/0x20 lib/dump_stack.c:129
 nmi_cpu_backtrace+0x2bf/0x2d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
 watchdog+0xd8f/0xed0 kernel/hung_task.c:423
 kthread+0x2ca/0x370 kernel/kthread.c:389
 ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 619 Comm: kworker/1:4 Not tainted syzkaller #0 0b5ffdee5fcd2f7749818d1ff954e9c21353764e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:io_serial_in+0x7b/0xc0 drivers/tty/serial/8250/8250_port.c:406
Code: e8 0a f5 6c fe 44 89 f9 d3 e3 49 83 c6 08 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 6b 62 c3 fe 41 03 1e 89 da ec <0f> b6 c0 5b 41 5c 41 5e 41 5f 5d e9 85 b1 76 02 cc 44 89 f9 80 e1
RSP: 0018:ffffc9000cfbe3b0 EFLAGS: 00000006
RAX: 1ffffffff113eb05 RBX: 00000000000003f9 RCX: 0000000000000000
RDX: 00000000000003f9 RSI: 00000000000fffff RDI: 0000000000100000
RBP: ffffc9000cfbe3d0 R08: 0000000000000003 R09: 0000000000000004
R10: 0000000000000000 R11: ffffffff83190950 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffffffff889f5fe8 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fca75b8aff0 CR3: 0000000121d9c000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 serial_port_in include/linux/serial_core.h:794 [inline]
 serial8250_console_write+0x328/0x2130 drivers/tty/serial/8250/8250_port.c:3385
 univ8250_console_write+0x6f/0xb0 drivers/tty/serial/8250/8250_core.c:396
 console_emit_next_record kernel/printk/printk.c:3151 [inline]
 console_flush_all+0x5e6/0xaa0 kernel/printk/printk.c:3239
 __console_flush_and_unlock kernel/printk/printk.c:3298 [inline]
 console_unlock+0xe9/0x270 kernel/printk/printk.c:3338
 vprintk_emit+0x27c/0x640 kernel/printk/printk.c:2462
 dev_vprintk_emit+0x33b/0x400 drivers/base/core.c:4962
 dev_printk_emit+0xe1/0x130 drivers/base/core.c:4973
 __netdev_printk+0x3f2/0x4e0 net/core/dev.c:11911
 netdev_warn+0x10b/0x160 net/core/dev.c:11964
 asix_read_cmd drivers/net/usb/asix_common.c:33 [inline]
 asix_check_host_enable drivers/net/usb/asix_common.c:102 [inline]
 __asix_mdio_read drivers/net/usb/asix_common.c:484 [inline]
 asix_mdio_read+0x25d/0x4b0 drivers/net/usb/asix_common.c:507
 asix_phy_reset+0xcc/0x1d0 drivers/net/usb/asix_devices.c:215
 ax88172_bind+0x3f1/0x590 drivers/net/usb/asix_devices.c:275
 usbnet_probe+0x9aa/0x2850 drivers/net/usb/usbnet.c:1775
 usb_probe_interface+0x696/0xc00 drivers/usb/core/driver.c:403
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x2d6/0x890 drivers/base/dd.c:657
 __driver_probe_device+0x198/0x280 drivers/base/dd.c:799
 driver_probe_device+0x54/0x3f0 drivers/base/dd.c:829
 __device_attach_driver+0x2f1/0x4b0 drivers/base/dd.c:957
 bus_for_each_drv+0x260/0x2f0 drivers/base/bus.c:459
 __device_attach+0x2bd/0x3a0 drivers/base/dd.c:1029
 device_initial_probe+0x1e/0x30 drivers/base/dd.c:1078
 bus_probe_device+0x18b/0x270 drivers/base/bus.c:534
 device_add+0x80c/0xc00 drivers/base/core.c:3692
 usb_set_configuration+0x1ad4/0x20b0 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0x95/0x160 drivers/usb/core/generic.c:254
 usb_probe_device+0x1d4/0x380 drivers/usb/core/driver.c:298
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x2d6/0x890 drivers/base/dd.c:657
 __driver_probe_device+0x198/0x280 drivers/base/dd.c:799
 driver_probe_device+0x54/0x3f0 drivers/base/dd.c:829
 __device_attach_driver+0x2f1/0x4b0 drivers/base/dd.c:957
 bus_for_each_drv+0x260/0x2f0 drivers/base/bus.c:459
 __device_attach+0x2bd/0x3a0 drivers/base/dd.c:1029
 device_initial_probe+0x1e/0x30 drivers/base/dd.c:1078
 bus_probe_device+0x18b/0x270 drivers/base/bus.c:534
 device_add+0x80c/0xc00 drivers/base/core.c:3692
 usb_new_device+0x9ed/0x1590 drivers/usb/core/hub.c:2690
 hub_port_connect drivers/usb/core/hub.c:5561 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5701 [inline]
 port_event drivers/usb/core/hub.c:5865 [inline]
 hub_event+0x2c81/0x4270 drivers/usb/core/hub.c:5947
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0x7d2/0x1020 kernel/workqueue.c:3319
 worker_thread+0xc58/0x1250 kernel/workqueue.c:3400
 kthread+0x2ca/0x370 kernel/kthread.c:389
 ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/11/05 09:23 android16-6.12 0d6730ee6542 a6c9c731 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust INFO: task hung in usbdev_release
* Struck through repros no longer work on HEAD.