syzbot


INFO: task hung in cfg80211_dfs_channels_update_work

Status: auto-obsoleted due to no activity on 2024/09/26 11:44
Reported-by: syzbot+de603abd2294b77155c8@syzkaller.appspotmail.com
First crash: 210d, last: 186d
Similar bugs (10)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: task hung in cfg80211_dfs_channels_update_work (2) 1 1071d 1071d 0/1 auto-closed as invalid on 2022/05/15 07:22
upstream INFO: task hung in cfg80211_dfs_channels_update_work (4) wireless 1 908d 908d 0/28 auto-closed as invalid on 2022/09/24 17:02
upstream INFO: task hung in cfg80211_dfs_channels_update_work wireless 1 1547d 1547d 0/28 auto-closed as invalid on 2020/12/24 22:54
upstream INFO: task hung in cfg80211_dfs_channels_update_work (5) wireless 1 699d 699d 0/28 auto-obsoleted due to no activity on 2023/04/29 21:53
upstream INFO: task hung in cfg80211_dfs_channels_update_work (7) wireless 37 180d 184d 26/28 fixed on 2024/07/09 19:14
upstream INFO: task hung in cfg80211_dfs_channels_update_work (2) wireless 3 1396d 1452d 0/28 auto-closed as invalid on 2021/05/25 10:38
upstream INFO: task hung in cfg80211_dfs_channels_update_work (6) wireless 3 436d 581d 0/28 auto-obsoleted due to no activity on 2024/01/10 05:01
linux-4.19 INFO: task hung in cfg80211_dfs_channels_update_work 1 1197d 1197d 0/1 auto-closed as invalid on 2022/01/09 14:58
upstream INFO: task hung in cfg80211_dfs_channels_update_work (3) wireless 18 1088d 1301d 0/28 closed as invalid on 2022/02/07 19:19
upstream INFO: task hung in cfg80211_dfs_channels_update_work (8) wireless 89 1d11h 73d 0/28 upstream: reported on 2024/10/09 16:00

Sample crash report:
INFO: task kworker/u4:4:1214 blocked for more than 143 seconds.
      Not tainted 5.15.161-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:4    state:D stack:25344 pid: 1214 ppid:     2 flags:0x00004000
Workqueue: cfg80211 cfg80211_dfs_channels_update_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
 schedule+0x11b/0x1f0 kernel/sched/core.c:6459
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6518
 __mutex_lock_common+0xe34/0x25a0 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 cfg80211_dfs_channels_update_work+0xbb/0x610 net/wireless/mlme.c:844
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300
 </TASK>
INFO: task kworker/1:5:3571 blocked for more than 143 seconds.
      Not tainted 5.15.161-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:5     state:D stack:22816 pid: 3571 ppid:     2 flags:0x00004000
Workqueue: events linkwatch_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/18 11:43 linux-5.15.y 4878aadf2d15 639d6cdf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: task hung in cfg80211_dfs_channels_update_work
2024/05/25 00:19 linux-5.15.y 83655231580b a10a183e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: task hung in cfg80211_dfs_channels_update_work
* Struck through repros no longer work on HEAD.