INFO: task hung in tipc_net_finalize_work

Status: upstream: reported on 2026/09/30 09:30
Subsystems: tipc
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+920b21f1eb9357bab704@syzkaller.appspotmail.com
First crash: 299d, last: 14h30m
▶ ▼ ✨ AI Jobs (3)
ID Workflow Result Correct Bug Created Started Finished Revision
3ffb7191 assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ✅ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ INFO: task hung in tipc_net_finalize_work 2026/05/31 10:25 2026/05/31 10:25 2026/05/31 11:42 6b4a8443
df1d3968 assessment-security 💥 INFO: task hung in tipc_net_finalize_work 2026/05/14 16:20 2026/05/14 16:20 2026/05/14 16:21 6ccb967e
6299cbf8 repro 💥 INFO: task hung in tipc_net_finalize_work 2026/03/06 23:47 2026/03/06 23:47 2026/03/07 00:10 31e9c887
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [tipc?] INFO: task hung in tipc_net_finalize_work 0 (1) 2026/09/30 09:30

Sample crash report:
INFO: task kworker/1:2:1218 blocked for more than 145 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:2     state:D stack:21560 pid:1218  tgid:1218  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events tipc_net_finalize_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x17db/0x58f0 kernel/sched/core.c:7284
 __schedule_loop kernel/sched/core.c:7361 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7376
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7433
 __mutex_lock_common kernel/locking/mutex.c:726 [inline]
 __mutex_lock+0x7c1/0x1550 kernel/locking/mutex.c:821
 tipc_net_finalize_work+0x1e/0x90 net/tipc/net.c:148
 process_one_work kernel/workqueue.c:3396 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
INFO: task kworker/u8:15:6369 blocked for more than 145 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:15   state:D stack:23624 pid:6369  tgid:6369  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events_unbound linkwatch_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x17db/0x58f0 kernel/sched/core.c:7284
 __schedule_loop kernel/sched/core.c:7361 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7376
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7433
 __mutex_lock_common kernel/locking/mutex.c:726 [inline]
 __mutex_lock+0x7c1/0x1550 kernel/locking/mutex.c:821
 linkwatch_event+0xe/0x60 net/core/link_watch.c:313
 process_one_work kernel/workqueue.c:3396 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
 kthread+0x38b/0x480 kernel/kthread.c:436

Crashes (33):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/23 02:30 upstream c4e9f74da438 3e2106e5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/08/29 02:16 upstream 1b78070aaef6 bcbc8ceb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/08/26 22:33 upstream 45c13f3f9e3b a2b77b9e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/06/20 06:03 upstream c98d767b3457 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in tipc_net_finalize_work
2026/03/30 18:41 upstream 7aaa8047eafd 458630d8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/09/30 02:46 net 54518e0e827f 7808aef4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/09/26 12:05 net aadf655e8ea9 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/09/26 09:19 net aadf655e8ea9 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/09/22 17:26 net 23d42b9a3bcd 3e2106e5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/09/20 00:16 net 6c096bb08de9 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/09/15 23:46 net 6c21ebc81338 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/09/15 05:52 net 6c21ebc81338 924033e8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/09/11 22:37 net 784450234395 b6a5eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/09/07 22:27 net 38b6be101006 680aa3e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/09/07 04:02 net 38b6be101006 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/09/05 14:41 net 80dd7e754b3a 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/09/04 01:29 net adf50c47a47f 801f0966 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/09/03 00:04 net 70f3995830d3 85995287 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/09/02 06:18 net 1d2929d0850f 587f6b29 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/08/29 01:26 net 7e1d6caa9c6b bcbc8ceb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/05/30 01:21 net 422b5233b607 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/09/30 08:05 net-next 6e23f90f2b8c 7808aef4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/09/23 20:39 net-next 944ae66642b7 0a1606bc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/09/21 04:14 net-next a4e22e9253e7 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/09/16 23:43 net-next 87b80c2f6b05 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/09/05 08:01 net-next 9eab111e7657 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/09/03 01:58 net-next c29b37ed7a4d 85995287 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/08/29 14:10 net-next 1b78070aaef6 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/08/28 22:22 net-next 1b78070aaef6 bcbc8ceb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/06/26 22:52 net-next 805185b7c7a1 fb92f11c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in tipc_net_finalize_work
2026/01/10 15:59 net-next 72dc44679b14 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in tipc_net_finalize_work
2025/12/07 19:26 net-next 8f7aa3d3c732 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in tipc_net_finalize_work
2025/12/05 01:39 net-next 8f7aa3d3c732 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in tipc_net_finalize_work
* Struck through repros no longer work on HEAD.