INFO: task kworker/0:0:9 blocked for more than 143 seconds.
      Not tainted 6.15.0-syzkaller-10769-g7d4e49a77d99 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:0     state:D stack:22744 pid:9     tgid:9     ppid:2      task_flags:0x4208060 flags:0x00004000
Workqueue: events switchdev_deferred_process_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5392 [inline]
 __schedule+0x16f1/0x4c90 kernel/sched/core.c:6781
 __schedule_loop kernel/sched/core.c:6859 [inline]
 schedule+0x161/0x360 kernel/sched/core.c:6874
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6931
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x636/0xe30 kernel/locking/mutex.c:747
 switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:104
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xadd/0x1780 kernel/workqueue.c:3321
 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3402
 kthread+0x70d/0x890 kernel/kthread.c:464
 ret_from_fork+0x3f1/0x750 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
INFO: task kworker/0:0:9 is blocked on a mutex likely owned by task kworker/u8:7:2996.
task:kworker/u8:7    state:D stack:20952 pid:2996  tgid:2996  ppid:2      task_flags:0x4208060 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5392 [inline]
 __schedule+0x16f1/0x4c90 kernel/sched/core.c:6781
 __schedule_loop kernel/sched/core.c:6859 [inline]
 schedule+0x161/0x360 kernel/sched/core.c:6874
 synchronize_rcu_expedited+0x57d/0x730 kernel/rcu/tree_exp.h:1013
 br_vlan_flush+0x111/0x1a0 net/bridge/br_vlan.c:846
 br_dev_uninit+0x28/0x40 net/bridge/br_device.c:159
 unregister_netdevice_many_notify+0x1c1f/0x2300 net/core/dev.c:12097
 ops_exit_rtnl_list net/core/net_namespace.c:188 [inline]
 ops_undo_list+0x3d8/0x990 net/core/net_namespace.c:249
 cleanup_net+0x4c1/0x7f0 net/core/net_namespace.c:686
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xadd/0x1780 kernel/workqueue.c:3321
 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3402
 kthread+0x70d/0x890 kernel/kthread.c:464
 ret_from_fork+0x3f1/0x750 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
INFO: task kworker/u8:1:13 blocked for more than 143 seconds.
      Not tainted 6.15.0-syzkaller-10769-g7d4e49a77d99 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:1    state:D stack:22816 pid:13    tgid:13    ppid:2      task_flags:0x4208060 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5392 [inline]
 __schedule+0x16f1/0x4c90 kernel/sched/core.c:6781
 __schedule_loop kernel/sched/core.c:6859 [inline]
 schedule+0x161/0x360 kernel/sched/core.c:6874
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6931
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x636/0xe30 kernel/locking/mutex.c:747
 rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
 addrconf_dad_work+0x10e/0x14b0 net/ipv6/addrconf.c:4198
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xadd/0x1780 kernel/workqueue.c:3321
 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3402
 kthread+0x70d/0x890 kernel/kthread.c:464
 ret_from_fork+0x3f1/0x750 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
INFO: task kworker/u8:1:13 is blocked on a mutex likely owned by task kworker/u8:7:2996.
task:kworker/u8:7    state:D stack:20952 pid:2996  tgid:2996  ppid:2      task_flags:0x4208060 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5392 [inline]
 __schedule+0x16f1/0x4c90 kernel/sched/core.c:6781
 __schedule_loop kernel/sched/core.c:6859 [inline]
 schedule+0x161/0x360 kernel/sched/core.c:6874
 synchronize_rcu_expedited+0x57d/0x730 kernel/rcu/tree_exp.h:1013
 synchronize_rcu+0x116/0x310 kernel/rcu/tree.c:3319
 lockdep_unregister_key+0x2ea/0x3c0 kernel/locking/lockdep.c:6623
 __qdisc_destroy+0x166/0x410 net/sched/sch_generic.c:1081
 qdisc_put net/sched/sch_generic.c:1107 [inline]
 dev_shutdown+0x348/0x440 net/sched/sch_generic.c:1495
 unregister_netdevice_many_notify+0xe9d/0x2300 net/core/dev.c:12064
 ops_exit_rtnl_list net/core/net_namespace.c:188 [inline]
 ops_undo_list+0x3d8/0x990 net/core/net_namespace.c:249
 cleanup_net+0x4c1/0x7f0 net/core/net_namespace.c:686
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xadd/0x1780 kernel/workqueue.c:3321
 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3402
 kthread+0x70d/0x890 kernel/kthread.c:464
 ret_from_fork+0x3f1/0x750 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
INFO: task kworker/u8:4:64 blocked for more than 144 seconds.
      Not tainted 6.15.0-syzkaller-10769-g7d4e49a77d99 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:4    state:D stack:19768 pid:64    tgid:64    ppid:2      task_flags:0x4208060 flags:0x00004000
Workqueue: events_unbound linkwatch_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5392 [inline]
 __schedule+0x16f1/0x4c90 kernel/sched/core.c:6781
 __schedule_loop kernel/sched/core.c:6859 [inline]
 schedule+0x161/0x360 kernel/sched/core.c:6874
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6931
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x636/0xe30 kernel/locking/mutex.c:747
 linkwatch_event+0xa/0x50 net/core/link_watch.c:303
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xadd/0x1780 kernel/workqueue.c:3321
 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3402
 kthread+0x70d/0x890 kernel/kthread.c:464