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INFO: task hung in reg_check_chans_work

Status: auto-obsoleted due to no activity on 2024/09/20 17:51
Reported-by: syzbot+870791a8f0038a20523d@syzkaller.appspotmail.com
First crash: 716d, last: 698d
▶ ▼ Similar bugs (17)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.6 INFO: task hung in reg_check_chans_work (2) origin:lts-only 1 C error 7 23d 120d 0/2 upstream: reported C repro on 2026/01/11 01:10
linux-5.15 INFO: task hung in reg_check_chans_work 1 10 551d 835d 0/3 auto-obsoleted due to no activity on 2025/02/14 20:30
linux-6.1 INFO: task hung in reg_check_chans_work (2) 1 1 507d 507d 0/3 auto-obsoleted due to no activity on 2025/03/30 18:04
upstream INFO: task hung in reg_check_chans_work (6) wireless 1 C error 129 674d 747d 26/29 fixed on 2024/07/09 19:14
upstream INFO: task hung in reg_check_chans_work (3) wireless 1 60 1619d 1682d 0/29 auto-closed as invalid on 2022/04/03 20:03
linux-4.14 INFO: task hung in reg_check_chans_work 1 1 1464d 1464d 0/1 auto-obsoleted due to no activity on 2022/09/05 08:58
upstream INFO: task hung in reg_check_chans_work (7) wireless 1 C error 913 10m 595d 0/29 upstream: reported C repro on 2024/09/23 08:39
upstream INFO: task hung in reg_check_chans_work (4) wireless 1 4 1411d 1413d 0/29 auto-closed as invalid on 2022/09/28 14:08
linux-6.6 INFO: task hung in reg_check_chans_work 1 5 221d 328d 0/2 auto-obsoleted due to no activity on 2026/01/10 01:05
linux-6.1 INFO: task hung in reg_check_chans_work (4) origin:lts-only 1 syz error 2 150d 174d 0/3 upstream: reported syz repro on 2025/11/18 03:08
upstream INFO: task hung in reg_check_chans_work net 1 15 2949d 3008d 0/29 closed as dup on 2018/02/14 15:33
linux-6.1 INFO: task hung in reg_check_chans_work (3) 1 1 400d 400d 0/3 auto-obsoleted due to no activity on 2025/07/15 07:58
android-44 INFO: task hung in reg_check_chans_work 1 18 2921d 2994d 0/2 auto-closed as invalid on 2019/02/22 14:50
linux-5.15 INFO: task hung in reg_check_chans_work (2) 1 1 1d03h 1d03h 0/3 upstream: reported on 2026/05/10 19:53
android-49 INFO: task hung in reg_check_chans_work 1 18 2920d 3018d 0/3 auto-closed as invalid on 2019/02/22 15:19
upstream INFO: task hung in reg_check_chans_work (5) wireless 1 26 925d 1054d 0/29 auto-obsoleted due to no activity on 2024/01/08 12:17
upstream INFO: task hung in reg_check_chans_work (2) wireless 1 3 2043d 2052d 0/29 auto-closed as invalid on 2021/01/04 12:48

Sample crash report:
INFO: task kworker/0:9:3781 blocked for more than 143 seconds.
      Not tainted 6.1.93-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:9     state:D stack:21592 pid:3781  ppid:2      flags:0x00004000
Workqueue: events_power_efficient reg_check_chans_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6693
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6b9/0xd80 kernel/locking/mutex.c:747
 reg_check_chans_work+0x8d/0xdb0 net/wireless/reg.c:2498
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
INFO: task kworker/1:15:3861 blocked for more than 143 seconds.

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/12 17:50 linux-6.1.y ae9f2a70d69e f815599d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in reg_check_chans_work
2024/06/06 20:47 linux-6.1.y 88690811da69 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in reg_check_chans_work
2024/05/25 23:30 linux-6.1.y 88690811da69 a10a183e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in reg_check_chans_work
* Struck through repros no longer work on HEAD.