syzbot


INFO: task hung in ieee80211_unregister_hw

Status: upstream: reported on 2024/06/11 08:31
Reported-by: syzbot+42a2d7ed429cdf6eccca@syzkaller.appspotmail.com
First crash: 40d, last: 40d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in ieee80211_unregister_hw wireless 151 16d 51d 27/27 fixed on 2024/07/09 19:14

Sample crash report:
INFO: task kworker/u4:2:154 blocked for more than 143 seconds.
      Not tainted 5.15.160-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:2    state:D stack:21144 pid:  154 ppid:     2 flags:0x00004000
Workqueue: netns cleanup_net
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
 ieee80211_unregister_hw+0x4d/0x220 net/mac80211/main.c:1383
 mac80211_hwsim_del_radio+0x2bb/0x4a0 drivers/net/wireless/mac80211_hwsim.c:3473
 hwsim_exit_net+0x5b8/0x660 drivers/net/wireless/mac80211_hwsim.c:4243
 ops_exit_list net/core/net_namespace.c:172 [inline]
 cleanup_net+0x6ce/0xb60 net/core/net_namespace.c:599
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
 kthread+0x3f6/0x4f0 kernel/kthread.c:334

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/11 08:31 linux-5.15.y c61bd26ae81a b7d9eb04 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: task hung in ieee80211_unregister_hw
* Struck through repros no longer work on HEAD.