INFO: task hung in cfg802154_pernet_exit (7)

Status: auto-obsoleted due to no activity on 2026/08/12 03:43
Subsystems: wpan
Labels: prio:normal
[Documentation on labels]
First crash: 185d, last: 102d
▶ ▼ ✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision
32c19559 assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ✅ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ INFO: task hung in cfg802154_pernet_exit (7) 2026/05/22 06:59 2026/05/22 06:59 2026/05/22 07:52 70ae9b03
▶ ▼ Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in cfg802154_pernet_exit (4) wpan 1 16 794d 825d 0/29 auto-obsoleted due to no activity on 2024/08/09 22:45
upstream INFO: task hung in cfg802154_pernet_exit (6) wpan 1 4 456d 553d 0/29 auto-obsoleted due to no activity on 2025/08/23 00:48
upstream INFO: task hung in cfg802154_pernet_exit (2) wpan 1 15 1769d 1817d 0/29 auto-closed as invalid on 2022/01/18 07:35
upstream INFO: task hung in cfg802154_pernet_exit (3) wpan 1 1 1388d 1388d 0/29 auto-obsoleted due to no activity on 2023/02/10 17:36
upstream INFO: task hung in cfg802154_pernet_exit wpan 1 1 2000d 2000d 0/29 auto-closed as invalid on 2021/06/01 14:17
upstream INFO: task hung in cfg802154_pernet_exit (5) wpan 1 10 666d 700d 0/29 auto-obsoleted due to no activity on 2024/12/19 05:26

Sample crash report:
INFO: task syz.9.9877:9402 blocked for more than 146 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.9877      state:D stack:25528 pid:9402  tgid:9398  ppid:6717   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x17b4/0x5680 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7283
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7340
 __mutex_lock_common kernel/locking/mutex.c:726 [inline]
 __mutex_lock+0x7f7/0x1550 kernel/locking/mutex.c:820
 cfg802154_pernet_exit+0x19/0xe0 net/ieee802154/core.c:351
 ops_exit_list net/core/net_namespace.c:199 [inline]
 ops_undo_list+0x49f/0x940 net/core/net_namespace.c:252
 setup_net+0x2f0/0x340 net/core/net_namespace.c:462
 copy_net_ns+0x50e/0x730 net/core/net_namespace.c:579
 create_new_namespaces+0x3e7/0x6a0 kernel/nsproxy.c:132
 unshare_nsproxy_namespaces+0x149/0x190 kernel/nsproxy.c:234
 ksys_unshare+0x57d/0x9f0 kernel/fork.c:3243
 __do_sys_unshare kernel/fork.c:3317 [inline]
 __se_sys_unshare kernel/fork.c:3315 [inline]
 __x64_sys_unshare+0x38/0x50 kernel/fork.c:3315
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f558df9ce59
RSP: 002b:00007f558ee0b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f558e216090 RCX: 00007f558df9ce59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000006a040000
RBP: 00007f558e032d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/05/14 03:37 net-next 1f8fd0fe5641 6ccb967e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in cfg802154_pernet_exit
2026/02/20 07:54 net-next 8bf22c33e7a1 17d780d6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in cfg802154_pernet_exit
* Struck through repros no longer work on HEAD.