syzbot


INFO: task hung in wiphy_unregister

Status: upstream: reported on 2024/05/22 02:46
Reported-by: syzbot+23a7c41b35de15ad62af@syzkaller.appspotmail.com
First crash: 28d, last: 5d17h
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in wiphy_unregister (2) wireless 54 21h01m 12d 0/27 upstream: reported on 2024/06/06 15:45
linux-5.15 INFO: task hung in wiphy_unregister 1 8d01h 8d01h 0/3 upstream: reported on 2024/06/11 07:25
upstream INFO: task hung in wiphy_unregister wireless 1 290d 290d 0/27 auto-obsoleted due to no activity on 2023/12/02 06:54

Sample crash report:
INFO: task kworker/u4:3:46 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/u4:3    state:D stack:23128 pid:46    ppid:2      flags:0x00004000
Workqueue: netns cleanup_net
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
 wiphy_unregister+0x22f/0xb10 net/wireless/core.c:1091
 ieee80211_unregister_hw+0x1b8/0x290 net/mac80211/main.c:1490
 mac80211_hwsim_del_radio+0x2be/0x4a0 drivers/net/wireless/mac80211_hwsim.c:4683
 hwsim_exit_net+0x5b8/0x660 drivers/net/wireless/mac80211_hwsim.c:5470
 ops_exit_list net/core/net_namespace.c:172 [inline]
 cleanup_net+0x6ce/0xb60 net/core/net_namespace.c:604
 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 dhcpcd:3216 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:dhcpcd          state:D stack:20744 pid:3216  ppid:3215   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/13 15:00 linux-6.1.y ae9f2a70d69e a9616ff5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in wiphy_unregister
2024/06/03 22:55 linux-6.1.y 88690811da69 a1feae05 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in wiphy_unregister
2024/05/28 18:49 linux-6.1.y 88690811da69 34889ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in wiphy_unregister
2024/05/22 02:45 linux-6.1.y 4078fa637fcd 1014eca7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in wiphy_unregister
* Struck through repros no longer work on HEAD.