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INFO: task hung in usbdev_open

Status: premoderation: reported on 2025/06/24 04:17
Reported-by: syzbot+b99d52e9132d70dc60d4@syzkaller.appspotmail.com
First crash: 23d, last: 1d14h
▶ ▼ Similar bugs (12)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: task hung in usbdev_open (3) 1 1 934d 934d 0/1 upstream: reported on 2022/12/25 16:08
upstream INFO: task hung in usbdev_open (2) usb 1 C error 1281 18h21m 1660d 0/29 upstream: reported C repro on 2020/12/29 11:48
linux-6.1 INFO: task hung in usbdev_open origin:lts-only 1 C done 3 780d 838d 3/3 fixed on 2023/06/28 17:15
linux-4.19 INFO: task hung in usbdev_open (2) 1 2 1334d 1341d 0/1 auto-closed as invalid on 2022/03/21 09:54
linux-5.15 INFO: task hung in usbdev_open origin:lts-only 1 C error 19 298d 837d 0/3 auto-obsoleted due to no activity on 2024/12/30 11:10
linux-6.1 INFO: task hung in usbdev_open (2) 1 1 584d 584d 0/3 auto-obsoleted due to no activity on 2024/03/20 05:29
linux-4.19 INFO: task hung in usbdev_open 1 6 1633d 1720d 0/1 auto-closed as invalid on 2021/05/25 14:21
linux-4.14 INFO: task hung in usbdev_open 1 7 1593d 1731d 0/1 auto-closed as invalid on 2021/07/05 05:59
upstream INFO: task hung in usbdev_open usb 1 2 2122d 2122d 0/29 auto-closed as invalid on 2019/12/23 20:14
linux-6.1 INFO: task hung in usbdev_open (3) 1 1 473d 473d 0/3 auto-obsoleted due to no activity on 2024/07/09 03:03
linux-4.14 INFO: task hung in usbdev_open (2) 1 1 885d 885d 0/1 upstream: reported on 2023/02/13 07:50
upstream INFO: task can't die in usbdev_open usb 1 4 1626d 1739d 0/29 auto-closed as invalid on 2021/04/02 18:49

Sample crash report:
INFO: task syz.4.923:3157 blocked for more than 122 seconds.
      Not tainted 6.12.30-syzkaller-g603af016e4a8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.923       state:D stack:0     pid:3157  tgid:3155  ppid:2121   flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5945 [inline]
 __schedule+0x132b/0x1e00 kernel/sched/core.c:7789
 __schedule_loop kernel/sched/core.c:7870 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:7885
 schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:7942
 __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:1025 [inline]
 usbdev_open+0x171/0x840 drivers/usb/core/devio.c:1051
 chrdev_open+0x4db/0x5f0 fs/char_dev.c:414
 do_dentry_open+0x978/0x1510 fs/open.c:960
 vfs_open+0x86/0x230 fs/open.c:1090
 do_open fs/namei.c:3774 [inline]
 path_openat+0x2b6c/0x34b0 fs/namei.c:3933
 do_filp_open+0x1c6/0x3e0 fs/namei.c:3960
 do_sys_openat2+0x12c/0x1c0 fs/open.c:1438
 do_sys_open fs/open.c:1453 [inline]
 __do_sys_openat fs/open.c:1469 [inline]
 __se_sys_openat fs/open.c:1464 [inline]
 __x64_sys_openat+0x13a/0x170 fs/open.c:1464
 x64_sys_call+0xe69/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fc553b8d290
RSP: 002b:00007fc554a30b70 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000008041 RCX: 00007fc553b8d290
RDX: 0000000000008041 RSI: 00007fc554a30c10 RDI: 00000000ffffff9c
RBP: 00007fc554a30c10 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: cccccccccccccccd
R13: 0000000000000000 R14: 00007fc553db6080 R15: 00007fffc225d018
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.30-syzkaller-g603af016e4a8 #0 c515e79d845c5a778cd5838f9063bc4edcb1333e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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+0x2c7/0x370 kernel/kthread.c:389
 ret_from_fork+0x64/0xa0 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: 64 Comm: kworker/1:2 Not tainted 6.12.30-syzkaller-g603af016e4a8 #0 c515e79d845c5a778cd5838f9063bc4edcb1333e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:io_serial_out+0x85/0xd0 drivers/tty/serial/8250/8250_port.c:413
Code: fe 44 89 e1 41 d3 e6 49 83 c7 08 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 a4 37 c4 fe 45 03 37 89 d8 44 89 f2 ee <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 4c 9c 70 02 cc 44 89 e1 80 e1 07
RSP: 0018:ffffc90000d4e3a8 EFLAGS: 00000006
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 00000000000003f9 RSI: 00000000000fffff RDI: 0000000000100000
RBP: ffffc90000d4e3d0 R08: 0000000000000003 R09: 0000000000000004
R10: 0000000000000000 R11: ffffffff83176dc0 R12: 0000000000000000
R13: dffffc0000000000 R14: 00000000000003f9 R15: ffffffff889dada8
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563b057a4b98 CR3: 000000010bb8c000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 serial_out drivers/tty/serial/8250/8250.h:142 [inline]
 serial8250_clear_IER drivers/tty/serial/8250/8250_port.c:-1 [inline]
 serial8250_console_write+0x3a6/0x2130 drivers/tty/serial/8250/8250_port.c:3387
 univ8250_console_write+0x6f/0xb0 drivers/tty/serial/8250/8250_core.c:396
 console_emit_next_record kernel/printk/printk.c:3132 [inline]
 console_flush_all+0x5e3/0xaa0 kernel/printk/printk.c:3220
 __console_flush_and_unlock kernel/printk/printk.c:3279 [inline]
 console_unlock+0xe9/0x270 kernel/printk/printk.c:3319
 vprintk_emit+0x27c/0x640 kernel/printk/printk.c:2443
 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:11895
 netdev_warn+0x10b/0x160 net/core/dev.c:11948
 asix_write_cmd drivers/net/usb/asix_common.c:57 [inline]
 asix_set_sw_mii drivers/net/usb/asix_common.c:75 [inline]
 asix_check_host_enable drivers/net/usb/asix_common.c:98 [inline]
 __asix_mdio_read drivers/net/usb/asix_common.c:506 [inline]
 asix_mdio_read+0x1de/0x4b0 drivers/net/usb/asix_common.c:529
 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:1772
 usb_probe_interface+0x693/0xc00 drivers/usb/core/driver.c:403
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x2d3/0x890 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+0x25d/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+0x1d1/0x380 drivers/usb/core/driver.c:298
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x2d3/0x890 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+0x25d/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:2662
 hub_port_connect drivers/usb/core/hub.c:5533 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5673 [inline]
 port_event drivers/usb/core/hub.c:5833 [inline]
 hub_event+0x265b/0x41a0 drivers/usb/core/hub.c:5915
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0x7d5/0x1020 kernel/workqueue.c:3319
 worker_thread+0xc58/0x1250 kernel/workqueue.c:3400
 kthread+0x2c7/0x370 kernel/kthread.c:389
 ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Crashes (7):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/07/15 20:06 android16-6.12 603af016e4a8 03fcfc4b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust INFO: task hung in usbdev_open
2025/07/08 23:08 android16-6.12 15d2fe054444 4d9fdfa4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust INFO: task hung in usbdev_open
2025/07/06 04:17 android16-6.12 e2bf362ee23b 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust INFO: task hung in usbdev_open
2025/07/02 20:26 android16-6.12 969c904869b3 bc80e4f0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust INFO: task hung in usbdev_open
2025/07/01 16:09 android16-6.12 648383294760 091a06cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust INFO: task hung in usbdev_open
2025/06/27 21:32 android16-6.12 153a0a38e976 803ce19b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust INFO: task hung in usbdev_open
2025/06/24 04:16 android16-6.12 1d4f4d446dbd e2f27c35 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust INFO: task hung in usbdev_open
* Struck through repros no longer work on HEAD.