syzbot


INFO: task hung in cfg80211_dfs_channels_update_work (7)

Status: fixed on 2024/07/09 19:14
Subsystems: wireless
[Documentation on labels]
Reported-by: syzbot+4f955b33340810d6c105@syzkaller.appspotmail.com
Fix commit: d864319871b0 net/sched: act_api: fix possible infinite loop in tcf_idr_check_alloc()
First crash: 189d, last: 26d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [wireless?] INFO: task hung in cfg80211_dfs_channels_update_work (7) 1 (2) 2024/06/20 14:04
Similar bugs (9)
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 917d 917d 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 755d 755d 0/27 auto-closed as invalid on 2022/09/24 17:02
upstream INFO: task hung in cfg80211_dfs_channels_update_work wireless 1 1394d 1394d 0/27 auto-closed as invalid on 2020/12/24 22:54
linux-5.15 INFO: task hung in cfg80211_dfs_channels_update_work 2 32d 56d 0/3 upstream: reported on 2024/05/25 00:20
upstream INFO: task hung in cfg80211_dfs_channels_update_work (5) wireless 1 546d 546d 0/27 auto-obsoleted due to no activity on 2023/04/29 21:53
upstream INFO: task hung in cfg80211_dfs_channels_update_work (2) wireless 3 1242d 1298d 0/27 auto-closed as invalid on 2021/05/25 10:38
upstream INFO: task hung in cfg80211_dfs_channels_update_work (6) wireless 3 282d 427d 0/27 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 1043d 1043d 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 934d 1147d 0/27 closed as invalid on 2022/02/07 19:19

Sample crash report:
INFO: task kworker/u8:1:12 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:1    state:D stack:18904 pid:12    tgid:12    ppid:2      flags:0x00004000
Workqueue: cfg80211 cfg80211_dfs_channels_update_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 cfg80211_dfs_channels_update_work+0xbf/0x610 net/wireless/mlme.c:1021
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
INFO: task kworker/u8:4:62 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:4    state:D stack:22032 pid:62    tgid:62    ppid:2      flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2557
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
 __flush_work+0xaa9/0xd00 kernel/workqueue.c:4211
 flush_all_backlogs net/core/dev.c:6000 [inline]
 unregister_netdevice_many_notify+0x8a0/0x16b0 net/core/dev.c:11201
 unregister_netdevice_many net/core/dev.c:11277 [inline]
 unregister_netdevice_queue+0x303/0x370 net/core/dev.c:11156

Crashes (37):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/24 12:22 upstream f2661062f16b edc5149a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in cfg80211_dfs_channels_update_work
2024/06/16 13:52 upstream 2ccbdf43d5e7 f429ab00 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in cfg80211_dfs_channels_update_work
2024/06/08 11:32 upstream 96e09b8f8166 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in cfg80211_dfs_channels_update_work
2024/06/04 20:12 upstream 2ab795141095 a1feae05 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in cfg80211_dfs_channels_update_work
2024/05/25 02:23 upstream 0b32d436c015 a10a183e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/05/22 14:58 upstream 8f6a15f095a6 4d098039 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in cfg80211_dfs_channels_update_work
2024/05/19 01:24 upstream 4b377b4868ef c0f1611a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in cfg80211_dfs_channels_update_work
2024/02/20 11:09 upstream b401b621758e 3af7dd65 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/02/01 02:06 upstream 1bbb19b6eb1b 373b66cd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/01/25 23:44 upstream ecb1b8288dc7 cc4a4020 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/02/20 23:44 upstream fca7526b7d89 3af7dd65 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 INFO: task hung in cfg80211_dfs_channels_update_work
2024/06/16 23:22 net be27b8965297 f429ab00 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/06/10 05:50 net 0579f2724904 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/06/07 16:17 net c44711b78608 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/06/04 04:08 net d6301802607b 0aba2352 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/02/22 01:35 net d80f8e96d47d 345111b5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/02/01 19:04 net b59af3045a66 81024119 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/06/20 19:48 net-next 3ec8d7572a69 dac2aa43 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-net-next-test-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/06/19 08:55 net-next 3ec8d7572a69 41b7e219 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/06/18 18:14 net-next 3ec8d7572a69 639d6cdf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/06/18 02:58 net-next 3ec8d7572a69 1f11cfd7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/06/16 08:31 net-next 3ec8d7572a69 f429ab00 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/06/15 01:55 net-next 3ec8d7572a69 8d849073 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/06/14 07:00 net-next 3ec8d7572a69 a9616ff5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/06/10 09:27 net-next 28f961f9d5b7 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/06/10 08:27 net-next 28f961f9d5b7 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/06/02 18:45 net-next b5c089880723 3113787f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/05/31 10:43 net-next 030fae30f059 34889ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/05/31 01:48 net-next 030fae30f059 34889ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/05/29 18:30 net-next 782471db6c72 34889ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/05/28 22:09 net-next 4b3529edbb8f 34889ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-net-next-test-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/05/21 02:56 net-next 4b377b4868ef c0f1611a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/05/21 02:51 net-next 4b377b4868ef c0f1611a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/05/20 22:23 net-next 4b377b4868ef c0f1611a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/01/13 00:22 net-next 3e7aeb78ab01 dda5a988 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in cfg80211_dfs_channels_update_work
2024/06/13 09:31 linux-next a957267fa7e9 2aa5052f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in cfg80211_dfs_channels_update_work
2024/05/01 17:05 linux-next f68868ba718e 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in cfg80211_dfs_channels_update_work
* Struck through repros no longer work on HEAD.