device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
INFO: task kworker/0:0:5 blocked for more than 140 seconds.
      Not tainted 4.19.88-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/0:0     D25904     5      2 0x80000000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
 context_switch kernel/sched/core.c:2826 [inline]
 __schedule+0x866/0x1dc0 kernel/sched/core.c:3515
 schedule+0x92/0x1c0 kernel/sched/core.c:3559
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77
 addrconf_dad_work+0xa9/0x1110 net/ipv6/addrconf.c:3975
 process_one_work+0x989/0x1750 kernel/workqueue.c:2153
 worker_thread+0x98/0xe40 kernel/workqueue.c:2296
 kthread+0x354/0x420 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
INFO: task kworker/1:2:7607 blocked for more than 140 seconds.
      Not tainted 4.19.88-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kobject: 'vlan0' (00000000591dd8b2): kobject_uevent_env
kobject: 'vlan0' (00000000591dd8b2): kobject_uevent_env: attempted to send uevent without kset!
kworker/1:2     D23392  7607      2 0x80000000
Workqueue: events linkwatch_event
Call Trace:
kobject: 'mesh' (0000000085f1cf42): kobject_cleanup, parent           (null)
 context_switch kernel/sched/core.c:2826 [inline]
 __schedule+0x866/0x1dc0 kernel/sched/core.c:3515
kobject: 'mesh' (0000000085f1cf42): calling ktype release
kobject: (0000000085f1cf42): dynamic_kobj_release
 schedule+0x92/0x1c0 kernel/sched/core.c:3559
kobject: 'mesh': free name
kobject: 'vlan0' (00000000591dd8b2): kobject_cleanup, parent           (null)
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072
kobject: 'vlan0' (00000000591dd8b2): calling ktype release
kobject: (00000000591dd8b2): dynamic_kobj_release
kobject: 'vlan0': free name