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INFO: task hung in reg_check_chans_work

Status: upstream: reported on 2025/06/17 22:04
Reported-by: syzbot+2e8a009d0669eed02147@syzkaller.appspotmail.com
First crash: 10h02m, last: 10h02m
▶ ▼ Similar bugs (14)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 INFO: task hung in reg_check_chans_work 10 223d 508d 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 179d 179d 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 C error 129 346d 420d 26/28 fixed on 2024/07/09 19:14
upstream INFO: task hung in reg_check_chans_work (3) wireless 60 1291d 1354d 0/28 auto-closed as invalid on 2022/04/03 20:03
linux-4.14 INFO: task hung in reg_check_chans_work 1 1136d 1136d 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 C error 554 1d04h 267d 0/28 upstream: reported C repro on 2024/09/23 08:39
upstream INFO: task hung in reg_check_chans_work (4) wireless 4 1083d 1086d 0/28 auto-closed as invalid on 2022/09/28 14:08
upstream INFO: task hung in reg_check_chans_work net 15 2621d 2680d 0/28 closed as dup on 2018/02/14 15:33
linux-6.1 INFO: task hung in reg_check_chans_work (3) 1 73d 73d 0/3 upstream: reported on 2025/04/06 07:58
android-44 INFO: task hung in reg_check_chans_work 18 2593d 2667d 0/2 auto-closed as invalid on 2019/02/22 14:50
android-49 INFO: task hung in reg_check_chans_work 18 2592d 2690d 0/3 auto-closed as invalid on 2019/02/22 15:19
linux-6.1 INFO: task hung in reg_check_chans_work 3 370d 388d 0/3 auto-obsoleted due to no activity on 2024/09/20 17:51
upstream INFO: task hung in reg_check_chans_work (5) wireless 26 597d 726d 0/28 auto-obsoleted due to no activity on 2024/01/08 12:17
upstream INFO: task hung in reg_check_chans_work (2) wireless 3 1715d 1724d 0/28 auto-closed as invalid on 2021/01/04 12:48

Sample crash report:
INFO: task kworker/0:5:5826 blocked for more than 157 seconds.
      Not tainted 6.6.93-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:5     state:D stack:23312 pid:5826  ppid:2      flags:0x00004000
Workqueue: events_power_efficient reg_check_chans_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0x14e2/0x4580 kernel/sched/core.c:6700
 schedule+0xbd/0x170 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6833
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6b7/0xcc0 kernel/locking/mutex.c:747
 reg_check_chans_work+0x91/0xd70 net/wireless/reg.c:2463

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/17 22:03 linux-6.6.y c2603c511feb e77fae15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf INFO: task hung in reg_check_chans_work
* Struck through repros no longer work on HEAD.