INFO: task hung in ovs_dp_masks_rebalance (4)

Status: auto-obsoleted due to no activity on 2023/10/11 14:44
Subsystems: openvswitch
[Documentation on labels]
First crash: 1140d, last: 1120d
▶ ▼ Similar bugs (8)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in ovs_dp_masks_rebalance (7) openvswitch 1 5 555d 566d 0/29 auto-obsoleted due to no activity on 2025/04/28 19:38
upstream INFO: task hung in ovs_dp_masks_rebalance (3) openvswitch 1 1 1353d 1353d 0/29 auto-obsoleted due to no activity on 2023/04/22 10:20
upstream INFO: task hung in ovs_dp_masks_rebalance (2) openvswitch 1 68 1511d 1798d 0/29 auto-obsoleted due to no activity on 2022/10/15 22:59
upstream INFO: task hung in ovs_dp_masks_rebalance openvswitch 1 771 2163d 2206d 15/29 fixed on 2020/09/16 22:51
linux-6.1 INFO: task hung in ovs_dp_masks_rebalance 1 1 275d 275d 0/3 auto-obsoleted due to no activity on 2026/02/13 02:42
linux-6.1 INFO: task hung in ovs_dp_masks_rebalance (2) 1 4 37d 115d 0/3 upstream: reported on 2026/04/14 04:54
upstream INFO: task hung in ovs_dp_masks_rebalance (5) openvswitch 1 23 775d 807d 0/29 auto-obsoleted due to no activity on 2024/08/11 13:50
upstream INFO: task hung in ovs_dp_masks_rebalance (6) openvswitch 1 19 632d 686d 0/29 auto-obsoleted due to no activity on 2025/01/01 16:32

Sample crash report:
INFO: task kworker/0:2:917 blocked for more than 143 seconds.
      Not tainted 6.5.0-rc1-syzkaller-00033-geb26cbb1a754 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:2     state:D
 stack:25248 pid:917   ppid:2      flags:0x00004000
Workqueue: events ovs_dp_masks_rebalance

Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0xecb/0x59d0 kernel/sched/core.c:6710
 schedule+0xe7/0x1b0 kernel/sched/core.c:6786
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6845
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x907/0x12d0 kernel/locking/mutex.c:747
 ovs_lock net/openvswitch/datapath.c:108 [inline]
 ovs_dp_masks_rebalance+0x24/0xf0 net/openvswitch/datapath.c:2524
 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2597
 worker_thread+0x687/0x1110 kernel/workqueue.c:2748
 kthread+0x33a/0x430 kernel/kthread.c:389
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
INFO: task kworker/1:8:5160 blocked for more than 147 seconds.
      Not tainted 6.5.0-rc1-syzkaller-00033-geb26cbb1a754 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:8     state:D stack:24816 pid:5160  ppid:2      flags:0x00004000
Workqueue: events ovs_dp_masks_rebalance
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0xecb/0x59d0 kernel/sched/core.c:6710
 schedule+0xe7/0x1b0 kernel/sched/core.c:6786
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6845
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x907/0x12d0 kernel/locking/mutex.c:747
 ovs_lock net/openvswitch/datapath.c:108 [inline]
 ovs_dp_masks_rebalance+0x24/0xf0 net/openvswitch/datapath.c:2524
 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2597

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/07/13 14:41 upstream eb26cbb1a754 86081196 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in ovs_dp_masks_rebalance
2023/06/23 15:01 upstream 8a28a0b6f1a1 09ffe269 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in ovs_dp_masks_rebalance
* Struck through repros no longer work on HEAD.