INFO: task hung in addrconf_dad

[upstream] INFO: task hung in addrconf_dad_work
Status: moderation: reported on 2018/03/30 20:01
Reported-by: syzbot+63fcb43f66d666cf0974@syzkaller.appspotmail.com
First: 292d, last: 3d21h

Sample crash report:
bond428 (unregistering): Released all slaves
bond427 (unregistering): Released all slaves
bond426 (unregistering): Released all slaves
bond425 (unregistering): Released all slaves
bond424 (unregistering): Released all slaves
INFO: task kworker/1:2:6669 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc1+ #22
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kobject: 'rx-15' (00000000ca518375): kobject_cleanup, parent 000000007bd5d321
kobject: 'rx-15' (00000000ca518375): auto cleanup 'remove' event
kobject: 'rx-15' (00000000ca518375): kobject_uevent_env
kworker/1:2     D22680  6669      2 0x80000000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
kobject: 'rx-15' (00000000ca518375): kobject_uevent_env: uevent_suppress caused the event to drop!
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
kobject: 'rx-15' (00000000ca518375): auto cleanup kobject_del
 schedule+0xfe/0x350 kernel/sched/core.c:3516
kobject: 'rx-15' (00000000ca518375): calling ktype release
kobject: 'rx-15': free name
kobject: 'rx-14' (00000000c83bd82a): kobject_cleanup, parent 000000007bd5d321
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0xa3b/0x1670 kernel/locking/mutex.c:1072
kobject: 'rx-14' (00000000c83bd82a): auto cleanup 'remove' event
kobject: 'rx-14' (00000000c83bd82a): kobject_uevent_env
kobject: 'rx-14' (00000000c83bd82a): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'rx-14' (00000000c83bd82a): auto cleanup kobject_del
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77
 addrconf_dad_work+0xb4/0x1320 net/ipv6/addrconf.c:3994
kobject: 'rx-14' (00000000c83bd82a): calling ktype release
 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153
kobject: 'rx-14': free name
kobject: 'rx-13' (0000000041253d4d): kobject_cleanup, parent 000000007bd5d321
kobject: 'rx-13' (0000000041253d4d): auto cleanup 'remove' event
kobject: 'rx-13' (0000000041253d4d): kobject_uevent_env
kobject: 'rx-13' (0000000041253d4d): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'rx-13' (0000000041253d4d): auto cleanup kobject_del
kobject: 'rx-13' (0000000041253d4d): calling ktype release
kobject: 'rx-13': free name
kobject: 'rx-12' (00000000e54572ad): kobject_cleanup, parent 000000007bd5d321
 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296
kobject: 'rx-12' (00000000e54572ad): auto cleanup 'remove' event
kobject: 'rx-12' (00000000e54572ad): kobject_uevent_env
kobject: 'rx-12' (00000000e54572ad): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'rx-12' (00000000e54572ad): auto cleanup kobject_del
kobject: 'rx-12' (00000000e54572ad): calling ktype release
kobject: 'rx-12': free name
kobject: 'rx-11' (0000000031e3bce6): kobject_cleanup, parent 000000007bd5d321
kobject: 'rx-11' (0000000031e3bce6): auto cleanup 'remove' event
kobject: 'rx-11' (0000000031e3bce6): kobject_uevent_env
kobject: 'rx-11' (0000000031e3bce6): kobject_uevent_env: uevent_suppress caused the event to drop!
 kthread+0x357/0x430 kernel/kthread.c:246
kobject: 'rx-11' (0000000031e3bce6): auto cleanup kobject_del
kobject: 'rx-11' (0000000031e3bce6): calling ktype release
kobject: 'rx-11': free name
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
kobject: 'rx-10' (00000000422a819b): kobject_cleanup, parent 000000007bd5d321
INFO: task kworker/0:2:31631 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc1+ #22
kobject: 'rx-10' (00000000422a819b): auto cleanup 'remove' event
kobject: 'rx-10' (00000000422a819b): kobject_uevent_env
kobject: 'rx-10' (00000000422a819b): kobject_uevent_env: uevent_suppress caused the event to drop!
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/0:2     D22680 31631      2 0x80000000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
kobject: 'rx-10' (00000000422a819b): auto cleanup kobject_del
kobject: 'rx-10' (00000000422a819b): calling ktype release
 schedule+0xfe/0x350 kernel/sched/core.c:3516
kobject: 'rx-10': free name
kobject: 'rx-9' (000000004b9fa141): kobject_cleanup, parent 000000007bd5d321
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0xa3b/0x1670 kernel/locking/mutex.c:1072
kobject: 'rx-9' (000000004b9fa141): auto cleanup 'remove' event
kobject: 'rx-9' (000000004b9fa141): kobject_uevent_env
kobject: 'rx-9' (000000004b9fa141): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'rx-9' (000000004b9fa141): auto cleanup kobject_del
kobject: 'rx-9' (000000004b9fa141): calling ktype release
kobject: 'rx-9': free name
kobject: 'rx-8' (00000000f506efbf): kobject_cleanup, parent 000000007bd5d321
kobject: 'rx-8' (00000000f506efbf): auto cleanup 'remove' event
kobject: 'rx-8' (00000000f506efbf): kobject_uevent_env
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
kobject: 'rx-8' (00000000f506efbf): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'rx-8' (00000000f506efbf): auto cleanup kobject_del
kobject: 'rx-8' (00000000f506efbf): calling ktype release
kobject: 'rx-8': free name
kobject: 'rx-7' (00000000cf65d594): kobject_cleanup, parent 000000007bd5d321
 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77
 addrconf_dad_work+0xb4/0x1320 net/ipv6/addrconf.c:3994
kobject: 'rx-7' (00000000cf65d594): auto cleanup 'remove' event
kobject: 'rx-7' (00000000cf65d594): kobject_uevent_env
 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153
kobject: 'rx-7' (00000000cf65d594): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'rx-7' (00000000cf65d594): auto cleanup kobject_del
kobject: 'rx-7' (00000000cf65d594): calling ktype release
kobject: 'rx-7': free name
kobject: 'rx-6' (00000000624166be): kobject_cleanup, parent 000000007bd5d321
kobject: 'rx-6' (00000000624166be): auto cleanup 'remove' event
kobject: 'rx-6' (00000000624166be): kobject_uevent_env
kobject: 'rx-6' (00000000624166be): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'rx-6' (00000000624166be): auto cleanup kobject_del
kobject: 'rx-6' (00000000624166be): calling ktype release
kobject: 'rx-6': free name
kobject: 'rx-5' (000000003b93c124): kobject_cleanup, parent 000000007bd5d321
kobject: 'rx-5' (000000003b93c124): auto cleanup 'remove' event
kobject: 'rx-5' (000000003b93c124): kobject_uevent_env
 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296
kobject: 'rx-5' (000000003b93c124): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'rx-5' (000000003b93c124): auto cleanup kobject_del
kobject: 'rx-5' (000000003b93c124): calling ktype release
kobject: 'rx-5': free name
kobject: 'rx-4' (00000000dd7c9274): kobject_cleanup, parent 000000007bd5d321
kobject: 'rx-4' (00000000dd7c9274): auto cleanup 'remove' event
kobject: 'rx-4' (00000000dd7c9274): kobject_uevent_env
kobject: 'rx-4' (00000000dd7c9274): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'rx-4' (00000000dd7c9274): auto cleanup kobject_del
kobject: 'rx-4' (00000000dd7c9274): calling ktype release
kobject: 'rx-4': free name
 kthread+0x357/0x430 kernel/kthread.c:246
kobject: 'rx-3' (00000000c7d967fd): kobject_cleanup, parent 000000007bd5d321
kobject: 'rx-3' (00000000c7d967fd): auto cleanup 'remove' event
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
kobject: 'rx-3' (00000000c7d967fd): kobject_uevent_env
kobject: 'rx-3' (00000000c7d967fd): kobject_uevent_env: uevent_suppress caused the event to drop!
INFO: task kworker/1:5:368 blocked for more than 140 seconds.
kobject: 'rx-3' (00000000c7d967fd): auto cleanup kobject_del
kobject: 'rx-3' (00000000c7d967fd): calling ktype release
      Not tainted 5.0.0-rc1+ #22
kobject: 'rx-3': free name
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kobject: 'rx-2' (000000002d6c2bce): kobject_cleanup, parent 000000007bd5d321
kworker/1:5     D24184   368      2 0x80000000
kobject: 'rx-2' (000000002d6c2bce): auto cleanup 'remove' event
kobject: 'rx-2' (000000002d6c2bce): kobject_uevent_env
Workqueue: events switchdev_deferred_process_work
kobject: 'rx-2' (000000002d6c2bce): kobject_uevent_env: uevent_suppress caused the event to drop!
Call Trace:
kobject: 'rx-2' (000000002d6c2bce): auto cleanup kobject_del
kobject: 'rx-2' (000000002d6c2bce): calling ktype release
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
kobject: 'rx-2': free name
 schedule+0xfe/0x350 kernel/sched/core.c:3516
kobject: 'rx-1' (000000000c897694): kobject_cleanup, parent 000000007bd5d321
kobject: 'rx-1' (000000000c897694): auto cleanup 'remove' event
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0xa3b/0x1670 kernel/locking/mutex.c:1072
kobject: 'rx-1' (000000000c897694): kobject_uevent_env
kobject: 'rx-1' (000000000c897694): kobject_uevent_env: uevent_suppress caused the event to drop!
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
kobject: 'rx-1' (000000000c897694): auto cleanup kobject_del
 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77
kobject: 'rx-1' (000000000c897694): calling ktype release
 switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:150
 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153
kobject: 'rx-1': free name
kobject: 'rx-0' (000000001a659971): kobject_cleanup, parent 000000007bd5d321
kobject: 'rx-0' (000000001a659971): auto cleanup 'remove' event
kobject: 'rx-0' (000000001a659971): kobject_uevent_env
kobject: 'rx-0' (000000001a659971): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'rx-0' (000000001a659971): auto cleanup kobject_del
 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296
kobject: 'rx-0' (000000001a659971): calling ktype release
kobject: 'rx-0': free name
kobject: 'tx-15' (00000000f32190c3): kobject_cleanup, parent 000000007bd5d321
kobject: 'tx-15' (00000000f32190c3): auto cleanup 'remove' event
kobject: 'tx-15' (00000000f32190c3): kobject_uevent_env
kobject: 'tx-15' (00000000f32190c3): kobject_uevent_env: uevent_suppress caused the event to drop!
 kthread+0x357/0x430 kernel/kthread.c:246
kobject: 'tx-15' (00000000f32190c3): auto cleanup kobject_del
kobject: 'tx-15' (00000000f32190c3): calling ktype release
kobject: 'tx-15': free name
kobject: 'tx-14' (000000006eadd3d3): kobject_cleanup, parent 000000007bd5d321
kobject: 'tx-14' (000000006eadd3d3): auto cleanup 'remove' event
kobject: 'tx-14' (000000006eadd3d3): kobject_uevent_env
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
kobject: 'tx-14' (000000006eadd3d3): kobject_uevent_env: uevent_suppress caused the event to drop!
INFO: task kworker/1:6:3828 blocked for more than 140 seconds.
kobject: 'tx-14' (000000006eadd3d3): auto cleanup kobject_del
      Not tainted 5.0.0-rc1+ #22
kobject: 'tx-14' (000000006eadd3d3): calling ktype release
kobject: 'tx-14': free name
kobject: 'tx-13' (0000000079eb90e1): kobject_cleanup, parent 000000007bd5d321
kobject: 'tx-13' (0000000079eb90e1): auto cleanup 'remove' event
kobject: 'tx-13' (0000000079eb90e1): kobject_uevent_env
kobject: 'tx-13' (0000000079eb90e1): kobject_uevent_env: uevent_suppress caused the event to drop!
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kobject: 'tx-13' (0000000079eb90e1): auto cleanup kobject_del
kworker/1:6     D24328  3828      2 0x80000000
kobject: 'tx-13' (0000000079eb90e1): calling ktype release
Workqueue: events linkwatch_event
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
kobject: 'tx-13': free name
kobject: 'tx-12' (000000005bbfaefc): kobject_cleanup, parent 000000007bd5d321
kobject: 'tx-12' (000000005bbfaefc): auto cleanup 'remove' event
 schedule+0xfe/0x350 kernel/sched/core.c:3516
kobject: 'tx-12' (000000005bbfaefc): kobject_uevent_env
kobject: 'tx-12' (000000005bbfaefc): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-12' (000000005bbfaefc): auto cleanup kobject_del
kobject: 'tx-12' (000000005bbfaefc): calling ktype release
kobject: 'tx-12': free name
kobject: 'tx-11' (00000000324d7826): kobject_cleanup, parent 000000007bd5d321
kobject: 'tx-11' (00000000324d7826): auto cleanup 'remove' event
kobject: 'tx-11' (00000000324d7826): kobject_uevent_env
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574
kobject: 'tx-11' (00000000324d7826): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-11' (00000000324d7826): auto cleanup kobject_del
kobject: 'tx-11' (00000000324d7826): calling ktype release
kobject: 'tx-11': free name
kobject: 'tx-10' (00000000ee06da7e): kobject_cleanup, parent 000000007bd5d321
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0xa3b/0x1670 kernel/locking/mutex.c:1072
kobject: 'tx-10' (00000000ee06da7e): auto cleanup 'remove' event
kobject: 'tx-10' (00000000ee06da7e): kobject_uevent_env
kobject: 'tx-10' (00000000ee06da7e): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-10' (00000000ee06da7e): auto cleanup kobject_del
kobject: 'tx-10' (00000000ee06da7e): calling ktype release
kobject: 'tx-10': free name
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
kobject: 'tx-9' (00000000afe51648): kobject_cleanup, parent 000000007bd5d321
kobject: 'tx-9' (00000000afe51648): auto cleanup 'remove' event
 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77
 linkwatch_event+0x5f/0xf0 net/core/link_watch.c:236
 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153
kobject: 'tx-9' (00000000afe51648): kobject_uevent_env
kobject: 'tx-9' (00000000afe51648): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-9' (00000000afe51648): auto cleanup kobject_del
kobject: 'tx-9' (00000000afe51648): calling ktype release
kobject: 'tx-9': free name
kobject: 'tx-8' (00000000a5538540): kobject_cleanup, parent 000000007bd5d321
kobject: 'tx-8' (00000000a5538540): auto cleanup 'remove' event
kobject: 'tx-8' (00000000a5538540): kobject_uevent_env
 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296
kobject: 'tx-8' (00000000a5538540): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-8' (00000000a5538540): auto cleanup kobject_del
kobject: 'tx-8' (00000000a5538540): calling ktype release
kobject: 'tx-8': free name
kobject: 'tx-7' (00000000bf28b0cf): kobject_cleanup, parent 000000007bd5d321
kobject: 'tx-7' (00000000bf28b0cf): auto cleanup 'remove' event
kobject: 'tx-7' (00000000bf28b0cf): kobject_uevent_env
kobject: 'tx-7' (00000000bf28b0cf): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-7' (00000000bf28b0cf): auto cleanup kobject_del
kobject: 'tx-7' (00000000bf28b0cf): calling ktype release
kobject: 'tx-7': free name
kobject: 'tx-6' (000000007e4c955c): kobject_cleanup, parent 000000007bd5d321
kobject: 'tx-6' (000000007e4c955c): auto cleanup 'remove' event
kobject: 'tx-6' (000000007e4c955c): kobject_uevent_env
kobject: 'tx-6' (000000007e4c955c): kobject_uevent_env: uevent_suppress caused the event to drop!
 kthread+0x357/0x430 kernel/kthread.c:246
kobject: 'tx-6' (000000007e4c955c): auto cleanup kobject_del
kobject: 'tx-6' (000000007e4c955c): calling ktype release
kobject: 'tx-6': free name
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
kobject: 'tx-5' (000000004c593e17): kobject_cleanup, parent 000000007bd5d321
INFO: task syz-executor0:10047 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc1+ #22
kobject: 'tx-5' (000000004c593e17): auto cleanup 'remove' event
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kobject: 'tx-5' (000000004c593e17): kobject_uevent_env
syz-executor0   D26712 10047   9987 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
kobject: 'tx-5' (000000004c593e17): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-5' (000000004c593e17): auto cleanup kobject_del
kobject: 'tx-5' (000000004c593e17): calling ktype release
kobject: 'tx-5': free name
kobject: 'tx-4' (000000000cd0c713): kobject_cleanup, parent 000000007bd5d321
 schedule+0xfe/0x350 kernel/sched/core.c:3516
kobject: 'tx-4' (000000000cd0c713): auto cleanup 'remove' event
kobject: 'tx-4' (000000000cd0c713): kobject_uevent_env
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0xa3b/0x1670 kernel/locking/mutex.c:1072
kobject: 'tx-4' (000000000cd0c713): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-4' (000000000cd0c713): auto cleanup kobject_del
kobject: 'tx-4' (000000000cd0c713): calling ktype release
kobject: 'tx-4': free name
kobject: 'tx-3' (00000000d4ca4a0d): kobject_cleanup, parent 000000007bd5d321
kobject: 'tx-3' (00000000d4ca4a0d): auto cleanup 'remove' event
kobject: 'tx-3' (00000000d4ca4a0d): kobject_uevent_env
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
kobject: 'tx-3' (00000000d4ca4a0d): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-3' (00000000d4ca4a0d): auto cleanup kobject_del
kobject: 'tx-3' (00000000d4ca4a0d): calling ktype release
 rtnl_lock net/core/rtnetlink.c:77 [inline]
 rtnetlink_rcv_msg+0x425/0xc30 net/core/rtnetlink.c:5127
kobject: 'tx-3': free name
kobject: 'tx-2' (0000000093f0fb43): kobject_cleanup, parent 000000007bd5d321
kobject: 'tx-2' (0000000093f0fb43): auto cleanup 'remove' event
kobject: 'tx-2' (0000000093f0fb43): kobject_uevent_env
kobject: 'tx-2' (0000000093f0fb43): kobject_uevent_env: uevent_suppress caused the event to drop!
 netlink_rcv_skb+0x17d/0x410 net/netlink/af_netlink.c:2477
kobject: 'tx-2' (0000000093f0fb43): auto cleanup kobject_del
kobject: 'tx-2' (0000000093f0fb43): calling ktype release
kobject: 'tx-2': free name
 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5148
 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
 netlink_unicast+0x574/0x770 net/netlink/af_netlink.c:1336
kobject: 'tx-1' (00000000325dbdf5): kobject_cleanup, parent 000000007bd5d321
kobject: 'tx-1' (00000000325dbdf5): auto cleanup 'remove' event
 netlink_sendmsg+0xa05/0xf90 net/netlink/af_netlink.c:1917
kobject: 'tx-1' (00000000325dbdf5): kobject_uevent_env
kobject: 'tx-1' (00000000325dbdf5): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-1' (00000000325dbdf5): auto cleanup kobject_del
kobject: 'tx-1' (00000000325dbdf5): calling ktype release
kobject: 'tx-1': free name
kobject: 'tx-0' (000000005cf697a2): kobject_cleanup, parent 000000007bd5d321
kobject: 'tx-0' (000000005cf697a2): auto cleanup 'remove' event
kobject: 'tx-0' (000000005cf697a2): kobject_uevent_env
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg+0xdd/0x130 net/socket.c:631
 ___sys_sendmsg+0x7ec/0x910 net/socket.c:2116
kobject: 'tx-0' (000000005cf697a2): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-0' (000000005cf697a2): auto cleanup kobject_del
kobject: 'tx-0' (000000005cf697a2): calling ktype release
kobject: 'tx-0': free name
kobject: 'queues' (000000007bd5d321): kobject_cleanup, parent           (null)
kobject: 'queues' (000000007bd5d321): calling ktype release
kobject: 'queues' (000000007bd5d321): kset_release
kobject: 'queues': free name
 __sys_sendmsg+0x112/0x270 net/socket.c:2154
kobject: 'bond424' (00000000843537e3): kobject_uevent_env
kobject: 'bond424' (00000000843537e3): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'batman_adv' (00000000ac4e6f9d): kobject_uevent_env
 __do_sys_sendmsg net/socket.c:2163 [inline]
 __se_sys_sendmsg net/socket.c:2161 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2161
kobject: 'batman_adv' (00000000ac4e6f9d): kobject_uevent_env: filter function caused the event to drop!
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
kobject: 'batman_adv' (00000000ac4e6f9d): kobject_cleanup, parent           (null)
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457ec9
kobject: 'batman_adv' (00000000ac4e6f9d): calling ktype release
Code: Bad RIP value.
kobject: (00000000ac4e6f9d): dynamic_kobj_release
RSP: 002b:00007f7932dafc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9
kobject: 'batman_adv': free name
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004
bond423 (unregistering): Released all slaves
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7932db06d4
kobject: 'rx-15' (000000003074bfa4): kobject_cleanup, parent 000000005743be16
R13: 00000000004c536c R14: 00000000004d8e00 R15: 00000000ffffffff
INFO: task syz-executor0:10062 blocked for more than 140 seconds.
kobject: 'rx-15' (000000003074bfa4): auto cleanup 'remove' event
kobject: 'rx-15' (000000003074bfa4): kobject_uevent_env
kobject: 'rx-15' (000000003074bfa4): kobject_uevent_env: uevent_suppress caused the event to drop!
      Not tainted 5.0.0-rc1+ #22
kobject: 'rx-15' (000000003074bfa4): auto cleanup kobject_del
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kobject: 'rx-15' (000000003074bfa4): calling ktype release
syz-executor0   D26712 10062   9987 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
kobject: 'rx-15': free name
kobject: 'rx-14' (000000007b00b59d): kobject_cleanup, parent 000000005743be16
 schedule+0xfe/0x350 kernel/sched/core.c:3516
kobject: 'rx-14' (000000007b00b59d): auto cleanup 'remove' event
kobject: 'rx-14' (000000007b00b59d): kobject_uevent_env
kobject: 'rx-14' (000000007b00b59d): kobject_uevent_env: uevent_suppress caused the event to drop!
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574
kobject: 'rx-14' (000000007b00b59d): auto cleanup kobject_del
kobject: 'rx-14' (000000007b00b59d): calling ktype release
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0xa3b/0x1670 kernel/locking/mutex.c:1072
kobject: 'rx-14': free name
kobject: 'rx-13' (00000000cd0c243e): kobject_cleanup, parent 000000005743be16
kobject: 'rx-13' (00000000cd0c243e): auto cleanup 'remove' event
kobject: 'rx-13' (00000000cd0c243e): kobject_uevent_env
kobject: 'rx-13' (00000000cd0c243e): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'rx-13' (00000000cd0c243e): auto cleanup kobject_del
kobject: 'rx-13' (00000000cd0c243e): calling ktype release
kobject: 'rx-13': free name
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
kobject: 'rx-12' (0000000043239f7a): kobject_cleanup, parent 000000005743be16
 rtnl_lock net/core/rtnetlink.c:77 [inline]
 rtnetlink_rcv_msg+0x425/0xc30 net/core/rtnetlink.c:5127
kobject: 'rx-12' (0000000043239f7a): auto cleanup 'remove' event
 netlink_rcv_skb+0x17d/0x410 net/netlink/af_netlink.c:2477
kobject: 'rx-12' (0000000043239f7a): kobject_uevent_env
kobject: 'rx-12' (0000000043239f7a): kobject_uevent_env: uevent_suppress caused the event to drop!
 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5148
 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
 netlink_unicast+0x574/0x770 net/netlink/af_netlink.c:1336
kobject: 'rx-12' (0000000043239f7a): auto cleanup kobject_del
kobject: 'rx-12' (0000000043239f7a): calling ktype release
kobject: 'rx-12': free name
 netlink_sendmsg+0xa05/0xf90 net/netlink/af_netlink.c:1917
kobject: 'rx-11' (0000000022c2e495): kobject_cleanup, parent 000000005743be16
kobject: 'rx-11' (0000000022c2e495): auto cleanup 'remove' event
kobject: 'rx-11' (0000000022c2e495): kobject_uevent_env
kobject: 'rx-11' (0000000022c2e495): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'rx-11' (0000000022c2e495): auto cleanup kobject_del
kobject: 'rx-11' (0000000022c2e495): calling ktype release
kobject: 'rx-11': free name
kobject: 'rx-10' (000000000878e33a): kobject_cleanup, parent 000000005743be16
kobject: 'rx-10' (000000000878e33a): auto cleanup 'remove' event
kobject: 'rx-10' (000000000878e33a): kobject_uevent_env
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg+0xdd/0x130 net/socket.c:631
kobject: 'rx-10' (000000000878e33a): kobject_uevent_env: uevent_suppress caused the event to drop!
 ___sys_sendmsg+0x7ec/0x910 net/socket.c:2116
kobject: 'rx-10' (000000000878e33a): auto cleanup kobject_del
kobject: 'rx-10' (000000000878e33a): calling ktype release
kobject: 'rx-10': free name
kobject: 'rx-9' (00000000b1afa55d): kobject_cleanup, parent 000000005743be16
kobject: 'rx-9' (00000000b1afa55d): auto cleanup 'remove' event
kobject: 'rx-9' (00000000b1afa55d): kobject_uevent_env
kobject: 'rx-9' (00000000b1afa55d): kobject_uevent_env: uevent_suppress caused the event to drop!
 __sys_sendmsg+0x112/0x270 net/socket.c:2154
kobject: 'rx-9' (00000000b1afa55d): auto cleanup kobject_del
kobject: 'rx-9' (00000000b1afa55d): calling ktype release
kobject: 'rx-9': free name
kobject: 'rx-8' (00000000ed188b94): kobject_cleanup, parent 000000005743be16
 __do_sys_sendmsg net/socket.c:2163 [inline]
 __se_sys_sendmsg net/socket.c:2161 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2161
kobject: 'rx-8' (00000000ed188b94): auto cleanup 'remove' event
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
kobject: 'rx-8' (00000000ed188b94): kobject_uevent_env
kobject: 'rx-8' (00000000ed188b94): kobject_uevent_env: uevent_suppress caused the event to drop!
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457ec9
Code: Bad RIP value.
RSP: 002b:00007f7932d6dc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9
kobject: 'rx-8' (00000000ed188b94): auto cleanup kobject_del
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004
RBP: 000000000073c040 R08: 0000000000000000 R09: 0000000000000000
kobject: 'rx-8' (00000000ed188b94): calling ktype release
kobject: 'rx-8': free name
kobject: 'rx-7' (00000000f9f5a9e6): kobject_cleanup, parent 000000005743be16
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7932d6e6d4
kobject: 'rx-7' (00000000f9f5a9e6): auto cleanup 'remove' event
R13: 00000000004c536c R14: 00000000004d8e00 R15: 00000000ffffffff
kobject: 'rx-7' (00000000f9f5a9e6): kobject_uevent_env
kobject: 'rx-7' (00000000f9f5a9e6): kobject_uevent_env: uevent_suppress caused the event to drop!
INFO: task syz-executor3:10057 blocked for more than 140 seconds.
kobject: 'rx-7' (00000000f9f5a9e6): auto cleanup kobject_del
      Not tainted 5.0.0-rc1+ #22
kobject: 'rx-7' (00000000f9f5a9e6): calling ktype release
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kobject: 'rx-7': free name
kobject: 'rx-6' (0000000025ff2718): kobject_cleanup, parent 000000005743be16
syz-executor3   D26712 10057   6706 0x00000004
kobject: 'rx-6' (0000000025ff2718): auto cleanup 'remove' event
Call Trace:
kobject: 'rx-6' (0000000025ff2718): kobject_uevent_env
kobject: 'rx-6' (0000000025ff2718): kobject_uevent_env: uevent_suppress caused the event to drop!
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
kobject: 'rx-6' (0000000025ff2718): auto cleanup kobject_del
kobject: 'rx-6' (0000000025ff2718): calling ktype release
 schedule+0xfe/0x350 kernel/sched/core.c:3516
kobject: 'rx-6': free name
kobject: 'rx-5' (000000000cb88aaa): kobject_cleanup, parent 000000005743be16
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574
kobject: 'rx-5' (000000000cb88aaa): auto cleanup 'remove' event
kobject: 'rx-5' (000000000cb88aaa): kobject_uevent_env
kobject: 'rx-5' (000000000cb88aaa): kobject_uevent_env: uevent_suppress caused the event to drop!
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0xa3b/0x1670 kernel/locking/mutex.c:1072
kobject: 'rx-5' (000000000cb88aaa): auto cleanup kobject_del
kobject: 'rx-5' (000000000cb88aaa): calling ktype release
kobject: 'rx-5': free name
kobject: 'rx-4' (0000000013c969b4): kobject_cleanup, parent 000000005743be16
kobject: 'rx-4' (0000000013c969b4): auto cleanup 'remove' event
kobject: 'rx-4' (0000000013c969b4): kobject_uevent_env
kobject: 'rx-4' (0000000013c969b4): kobject_uevent_env: uevent_suppress caused the event to drop!
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
kobject: 'rx-4' (0000000013c969b4): auto cleanup kobject_del
 rtnl_lock net/core/rtnetlink.c:77 [inline]
 rtnetlink_rcv_msg+0x425/0xc30 net/core/rtnetlink.c:5127
 netlink_rcv_skb+0x17d/0x410 net/netlink/af_netlink.c:2477
kobject: 'rx-4' (0000000013c969b4): calling ktype release
kobject: 'rx-4': free name
 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5148
 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
 netlink_unicast+0x574/0x770 net/netlink/af_netlink.c:1336
kobject: 'rx-3' (000000007cb69fe4): kobject_cleanup, parent 000000005743be16
 netlink_sendmsg+0xa05/0xf90 net/netlink/af_netlink.c:1917
kobject: 'rx-3' (000000007cb69fe4): auto cleanup 'remove' event
kobject: 'rx-3' (000000007cb69fe4): kobject_uevent_env
kobject: 'rx-3' (000000007cb69fe4): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'rx-3' (000000007cb69fe4): auto cleanup kobject_del
kobject: 'rx-3' (000000007cb69fe4): calling ktype release
kobject: 'rx-3': free name
kobject: 'rx-2' (000000007205cb62): kobject_cleanup, parent 000000005743be16
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg+0xdd/0x130 net/socket.c:631
kobject: 'rx-2' (000000007205cb62): auto cleanup 'remove' event
kobject: 'rx-2' (000000007205cb62): kobject_uevent_env
 ___sys_sendmsg+0x7ec/0x910 net/socket.c:2116
kobject: 'rx-2' (000000007205cb62): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'rx-2' (000000007205cb62): auto cleanup kobject_del
kobject: 'rx-2' (000000007205cb62): calling ktype release
kobject: 'rx-2': free name
kobject: 'rx-1' (00000000459f0a7c): kobject_cleanup, parent 000000005743be16
kobject: 'rx-1' (00000000459f0a7c): auto cleanup 'remove' event
kobject: 'rx-1' (00000000459f0a7c): kobject_uevent_env
kobject: 'rx-1' (00000000459f0a7c): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'rx-1' (00000000459f0a7c): auto cleanup kobject_del
kobject: 'rx-1' (00000000459f0a7c): calling ktype release
kobject: 'rx-1': free name
kobject: 'rx-0' (00000000e7879396): kobject_cleanup, parent 000000005743be16
kobject: 'rx-0' (00000000e7879396): auto cleanup 'remove' event
kobject: 'rx-0' (00000000e7879396): kobject_uevent_env
kobject: 'rx-0' (00000000e7879396): kobject_uevent_env: uevent_suppress caused the event to drop!
 __sys_sendmsg+0x112/0x270 net/socket.c:2154
kobject: 'rx-0' (00000000e7879396): auto cleanup kobject_del
kobject: 'rx-0' (00000000e7879396): calling ktype release
 __do_sys_sendmsg net/socket.c:2163 [inline]
 __se_sys_sendmsg net/socket.c:2161 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2161
kobject: 'rx-0': free name
kobject: 'tx-15' (00000000fdc04d47): kobject_cleanup, parent 000000005743be16
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
kobject: 'tx-15' (00000000fdc04d47): auto cleanup 'remove' event
kobject: 'tx-15' (00000000fdc04d47): kobject_uevent_env
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
kobject: 'tx-15' (00000000fdc04d47): kobject_uevent_env: uevent_suppress caused the event to drop!
RIP: 0033:0x457ec9
Code: Bad RIP value.
kobject: 'tx-15' (00000000fdc04d47): auto cleanup kobject_del
RSP: 002b:00007f25c1731c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
kobject: 'tx-15' (00000000fdc04d47): calling ktype release
kobject: 'tx-15': free name
kobject: 'tx-14' (0000000065704fde): kobject_cleanup, parent 000000005743be16
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9
kobject: 'tx-14' (0000000065704fde): auto cleanup 'remove' event
kobject: 'tx-14' (0000000065704fde): kobject_uevent_env
kobject: 'tx-14' (0000000065704fde): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-14' (0000000065704fde): auto cleanup kobject_del
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004
kobject: 'tx-14' (0000000065704fde): calling ktype release
kobject: 'tx-14': free name
kobject: 'tx-13' (00000000a35ff734): kobject_cleanup, parent 000000005743be16
kobject: 'tx-13' (00000000a35ff734): auto cleanup 'remove' event
kobject: 'tx-13' (00000000a35ff734): kobject_uevent_env
kobject: 'tx-13' (00000000a35ff734): kobject_uevent_env: uevent_suppress caused the event to drop!
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
kobject: 'tx-13' (00000000a35ff734): auto cleanup kobject_del
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f25c17326d4
R13: 00000000004c536c R14: 00000000004d8e00 R15: 00000000ffffffff
kobject: 'tx-13' (00000000a35ff734): calling ktype release
kobject: 'tx-13': free name
kobject: 'tx-12' (00000000ad44f84d): kobject_cleanup, parent 000000005743be16
INFO: task syz-executor3:10060 blocked for more than 140 seconds.
kobject: 'tx-12' (00000000ad44f84d): auto cleanup 'remove' event
      Not tainted 5.0.0-rc1+ #22
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kobject: 'tx-12' (00000000ad44f84d): kobject_uevent_env
kobject: 'tx-12' (00000000ad44f84d): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-12' (00000000ad44f84d): auto cleanup kobject_del
kobject: 'tx-12' (00000000ad44f84d): calling ktype release
syz-executor3   D26712 10060   6706 0x00000004
kobject: 'tx-12': free name
Call Trace:
kobject: 'tx-11' (000000004535f5fb): kobject_cleanup, parent 000000005743be16
kobject: 'tx-11' (000000004535f5fb): auto cleanup 'remove' event
kobject: 'tx-11' (000000004535f5fb): kobject_uevent_env
kobject: 'tx-11' (000000004535f5fb): kobject_uevent_env: uevent_suppress caused the event to drop!
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
kobject: 'tx-11' (000000004535f5fb): auto cleanup kobject_del
kobject: 'tx-11' (000000004535f5fb): calling ktype release
kobject: 'tx-11': free name
kobject: 'tx-10' (000000008f411ffc): kobject_cleanup, parent 000000005743be16
kobject: 'tx-10' (000000008f411ffc): auto cleanup 'remove' event
kobject: 'tx-10' (000000008f411ffc): kobject_uevent_env
 schedule+0xfe/0x350 kernel/sched/core.c:3516
kobject: 'tx-10' (000000008f411ffc): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-10' (000000008f411ffc): auto cleanup kobject_del
kobject: 'tx-10' (000000008f411ffc): calling ktype release
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0xa3b/0x1670 kernel/locking/mutex.c:1072
kobject: 'tx-10': free name
kobject: 'tx-9' (000000006e24b77d): kobject_cleanup, parent 000000005743be16
kobject: 'tx-9' (000000006e24b77d): auto cleanup 'remove' event
kobject: 'tx-9' (000000006e24b77d): kobject_uevent_env
kobject: 'tx-9' (000000006e24b77d): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-9' (000000006e24b77d): auto cleanup kobject_del
kobject: 'tx-9' (000000006e24b77d): calling ktype release
kobject: 'tx-9': free name
kobject: 'tx-8' (00000000de04d046): kobject_cleanup, parent 000000005743be16
kobject: 'tx-8' (00000000de04d046): auto cleanup 'remove' event
kobject: 'tx-8' (00000000de04d046): kobject_uevent_env
kobject: 'tx-8' (00000000de04d046): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-8' (00000000de04d046): auto cleanup kobject_del
kobject: 'tx-8' (00000000de04d046): calling ktype release
kobject: 'tx-8': free name
kobject: 'tx-7' (00000000ee9758ab): kobject_cleanup, parent 000000005743be16
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
kobject: 'tx-7' (00000000ee9758ab): auto cleanup 'remove' event
kobject: 'tx-7' (00000000ee9758ab): kobject_uevent_env
 rtnl_lock net/core/rtnetlink.c:77 [inline]
 rtnetlink_rcv_msg+0x425/0xc30 net/core/rtnetlink.c:5127
kobject: 'tx-7' (00000000ee9758ab): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-7' (00000000ee9758ab): auto cleanup kobject_del
kobject: 'tx-7' (00000000ee9758ab): calling ktype release
 netlink_rcv_skb+0x17d/0x410 net/netlink/af_netlink.c:2477
kobject: 'tx-7': free name
kobject: 'tx-6' (000000001bf5d137): kobject_cleanup, parent 000000005743be16
 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5148
kobject: 'tx-6' (000000001bf5d137): auto cleanup 'remove' event
kobject: 'tx-6' (000000001bf5d137): kobject_uevent_env
kobject: 'tx-6' (000000001bf5d137): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-6' (000000001bf5d137): auto cleanup kobject_del
kobject: 'tx-6' (000000001bf5d137): calling ktype release
 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
 netlink_unicast+0x574/0x770 net/netlink/af_netlink.c:1336
kobject: 'tx-6': free name
kobject: 'tx-5' (000000003e907f91): kobject_cleanup, parent 000000005743be16
 netlink_sendmsg+0xa05/0xf90 net/netlink/af_netlink.c:1917
kobject: 'tx-5' (000000003e907f91): auto cleanup 'remove' event
kobject: 'tx-5' (000000003e907f91): kobject_uevent_env
kobject: 'tx-5' (000000003e907f91): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-5' (000000003e907f91): auto cleanup kobject_del
kobject: 'tx-5' (000000003e907f91): calling ktype release
kobject: 'tx-5': free name
kobject: 'tx-4' (0000000079c89010): kobject_cleanup, parent 000000005743be16
kobject: 'tx-4' (0000000079c89010): auto cleanup 'remove' event
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg+0xdd/0x130 net/socket.c:631
 ___sys_sendmsg+0x7ec/0x910 net/socket.c:2116
kobject: 'tx-4' (0000000079c89010): kobject_uevent_env
kobject: 'tx-4' (0000000079c89010): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-4' (0000000079c89010): auto cleanup kobject_del
kobject: 'tx-4' (0000000079c89010): calling ktype release
kobject: 'tx-4': free name
kobject: 'tx-3' (000000007da2a6fa): kobject_cleanup, parent 000000005743be16
kobject: 'tx-3' (000000007da2a6fa): auto cleanup 'remove' event
kobject: 'tx-3' (000000007da2a6fa): kobject_uevent_env
kobject: 'tx-3' (000000007da2a6fa): kobject_uevent_env: uevent_suppress caused the event to drop!
 __sys_sendmsg+0x112/0x270 net/socket.c:2154
kobject: 'tx-3' (000000007da2a6fa): auto cleanup kobject_del
kobject: 'tx-3' (000000007da2a6fa): calling ktype release
kobject: 'tx-3': free name
kobject: 'tx-2' (00000000dc229445): kobject_cleanup, parent 000000005743be16
 __do_sys_sendmsg net/socket.c:2163 [inline]
 __se_sys_sendmsg net/socket.c:2161 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2161
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
kobject: 'tx-2' (00000000dc229445): auto cleanup 'remove' event
kobject: 'tx-2' (00000000dc229445): kobject_uevent_env
kobject: 'tx-2' (00000000dc229445): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-2' (00000000dc229445): auto cleanup kobject_del
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
kobject: 'tx-2' (00000000dc229445): calling ktype release
kobject: 'tx-2': free name
RIP: 0033:0x457ec9
Code: Bad RIP value.
RSP: 002b:00007f25c1710c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
kobject: 'tx-1' (00000000190b3bea): kobject_cleanup, parent 000000005743be16
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004
RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f25c17116d4
R13: 00000000004c536c R14: 00000000004d8e00 R15: 00000000ffffffff
kobject: 'tx-1' (00000000190b3bea): auto cleanup 'remove' event
INFO: task syz-executor2:10052 blocked for more than 140 seconds.
kobject: 'tx-1' (00000000190b3bea): kobject_uevent_env
      Not tainted 5.0.0-rc1+ #22
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2   D25904 10052   7914 0x00000004
kobject: 'tx-1' (00000000190b3bea): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-1' (00000000190b3bea): auto cleanup kobject_del
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
 schedule+0xfe/0x350 kernel/sched/core.c:3516
kobject: 'tx-1' (00000000190b3bea): calling ktype release
kobject: 'tx-1': free name
kobject: 'tx-0' (00000000aebb95bd): kobject_cleanup, parent 000000005743be16
kobject: 'tx-0' (00000000aebb95bd): auto cleanup 'remove' event
kobject: 'tx-0' (00000000aebb95bd): kobject_uevent_env
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0xa3b/0x1670 kernel/locking/mutex.c:1072
kobject: 'tx-0' (00000000aebb95bd): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-0' (00000000aebb95bd): auto cleanup kobject_del
kobject: 'tx-0' (00000000aebb95bd): calling ktype release
kobject: 'tx-0': free name
kobject: 'queues' (000000005743be16): kobject_cleanup, parent           (null)
kobject: 'queues' (000000005743be16): calling ktype release
kobject: 'queues' (000000005743be16): kset_release
kobject: 'queues': free name
kobject: 'bond423' (00000000d1875f44): kobject_uevent_env
kobject: 'bond423' (00000000d1875f44): kobject_uevent_env: uevent_suppress caused the event to drop!
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
kobject: 'batman_adv' (0000000089cb4315): kobject_uevent_env
kobject: 'batman_adv' (0000000089cb4315): kobject_uevent_env: filter function caused the event to drop!
kobject: 'batman_adv' (0000000089cb4315): kobject_cleanup, parent           (null)
kobject: 'batman_adv' (0000000089cb4315): calling ktype release
kobject: (0000000089cb4315): dynamic_kobj_release
 rtnl_lock net/core/rtnetlink.c:77 [inline]
 rtnetlink_rcv_msg+0x425/0xc30 net/core/rtnetlink.c:5127
kobject: 'batman_adv': free name
bond422 (unregistering): Released all slaves
kobject: 'rx-15' (0000000007e5337c): kobject_cleanup, parent 00000000f71d413c
kobject: 'rx-15' (0000000007e5337c): auto cleanup 'remove' event
 netlink_rcv_skb+0x17d/0x410 net/netlink/af_netlink.c:2477
kobject: 'rx-15' (0000000007e5337c): kobject_uevent_env
kobject: 'rx-15' (0000000007e5337c): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'rx-15' (0000000007e5337c): auto cleanup kobject_del
kobject: 'rx-15' (0000000007e5337c): calling ktype release
 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5148
kobject: 'rx-15': free name
 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
 netlink_unicast+0x574/0x770 net/netlink/af_netlink.c:1336
kobject: 'rx-14' (00000000a1a25509): kobject_cleanup, parent 00000000f71d413c
 netlink_sendmsg+0xa05/0xf90 net/netlink/af_netlink.c:1917
kobject: 'rx-14' (00000000a1a25509): auto cleanup 'remove' event
kobject: 'rx-14' (00000000a1a25509): kobject_uevent_env
kobject: 'rx-14' (00000000a1a25509): kobject_uevent_env: uevent_suppress caused the event to drop!
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg+0xdd/0x130 net/socket.c:631
 ___sys_sendmsg+0x7ec/0x910 net/socket.c:2116
kobject: 'rx-14' (00000000a1a25509): auto cleanup kobject_del
kobject: 'rx-14' (00000000a1a25509): calling ktype release
kobject: 'rx-14': free name
kobject: 'rx-13' (00000000024fd3b9): kobject_cleanup, parent 00000000f71d413c
kobject: 'rx-13' (00000000024fd3b9): auto cleanup 'remove' event
kobject: 'rx-13' (00000000024fd3b9): kobject_uevent_env
 __sys_sendmsg+0x112/0x270 net/socket.c:2154
 __do_sys_sendmsg net/socket.c:2163 [inline]
 __se_sys_sendmsg net/socket.c:2161 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2161
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457ec9
Code: Bad RIP value.
RSP: 002b:00007fc8b61bdc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc8b61be6d4
R13: 00000000004c536c R14: 00000000004d8e00 R15: 00000000ffffffff
INFO: task syz-executor2:10067 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc1+ #22
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2   D26712 10067   7914 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
 schedule+0xfe/0x350 kernel/sched/core.c:3516
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0xa3b/0x1670 kernel/locking/mutex.c:1072
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
 rtnl_lock net/core/rtnetlink.c:77 [inline]
 rtnetlink_rcv_msg+0x425/0xc30 net/core/rtnetlink.c:5127
 netlink_rcv_skb+0x17d/0x410 net/netlink/af_netlink.c:2477
 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5148
 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
 netlink_unicast+0x574/0x770 net/netlink/af_netlink.c:1336
 netlink_sendmsg+0xa05/0xf90 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg+0xdd/0x130 net/socket.c:631
 ___sys_sendmsg+0x7ec/0x910 net/socket.c:2116
 __sys_sendmsg+0x112/0x270 net/socket.c:2154
 __do_sys_sendmsg net/socket.c:2163 [inline]
 __se_sys_sendmsg net/socket.c:2161 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2161
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457ec9
Code: Bad RIP value.
RSP: 002b:00007fc8b617bc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004
RBP: 000000000073c040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc8b617c6d4
R13: 00000000004c536c R14: 00000000004d8e00 R15: 00000000ffffffff

Showing all locks held in the system:
1 lock held by khungtaskd/1041:
 #0: 00000000b9ac1d78 (rcu_read_lock){....}, at: debug_show_all_locks+0xc6/0x41d kernel/locking/lockdep.c:4389
1 lock held by rsyslogd/7784:
 #0: 000000004c038dab (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1b3/0x1f0 fs/file.c:795
2 locks held by getty/7874:
 #0: 00000000dbf42343 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 000000008ef8d776 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154
2 locks held by getty/7875:
 #0: 00000000be006103 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 000000000c9f049f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154
2 locks held by getty/7876:
 #0: 0000000094075672 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000a6ee1441 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154
2 locks held by getty/7877:
 #0: 00000000cbaf8646 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000e19bff1e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154
2 locks held by getty/7878:
 #0: 00000000d0ef0ff2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000b3bef705 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154
2 locks held by getty/7879:
 #0: 0000000000e74f18 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000bc9b0a9d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154
2 locks held by getty/7880:
 #0: 00000000914821d7 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 000000009d77b643 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154
3 locks held by kworker/1:2/6669:
kobject: 'rx-13' (00000000024fd3b9): kobject_uevent_env: uevent_suppress caused the event to drop!
 #0: 00000000ea98b8b1 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: __write_once_size include/linux/compiler.h:218 [inline]
 #0: 00000000ea98b8b1 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: 00000000ea98b8b1 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline]
 #0: 00000000ea98b8b1 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline]
 #0: 00000000ea98b8b1 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline]
 #0: 00000000ea98b8b1 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
 #0: 00000000ea98b8b1 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0xbc7/0x1ce0 kernel/workqueue.c:2124
kobject: 'rx-13' (00000000024fd3b9): auto cleanup kobject_del
 #1: 00000000f6ff9097 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}, at: process_one_work+0xc1d/0x1ce0 kernel/workqueue.c:2128
kobject: 'rx-13' (00000000024fd3b9): calling ktype release
 #2: 00000000e1fddd4d (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77
kobject: 'rx-13': free name
7 locks held by kworker/u4:1/28045:
kobject: 'rx-12' (000000006692218f): kobject_cleanup, parent 00000000f71d413c
3 locks held by kworker/0:2/31631:
kobject: 'rx-12' (000000006692218f): auto cleanup 'remove' event
 #0: 00000000ea98b8b1 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: __write_once_size include/linux/compiler.h:218 [inline]
 #0: 00000000ea98b8b1 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: 00000000ea98b8b1 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline]
 #0: 00000000ea98b8b1 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline]
 #0: 00000000ea98b8b1 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline]
 #0: 00000000ea98b8b1 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
 #0: 00000000ea98b8b1 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0xbc7/0x1ce0 kernel/workqueue.c:2124
kobject: 'rx-12' (000000006692218f): kobject_uevent_env
 #1: 00000000f769799d ((work_completion)(&(&ifa->dad_work)->work)){+.+.}, at: process_one_work+0xc1d/0x1ce0 kernel/workqueue.c:2128
kobject: 'rx-12' (000000006692218f): kobject_uevent_env: uevent_suppress caused the event to drop!
 #2: 00000000e1fddd4d (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77
kobject: 'rx-12' (000000006692218f): auto cleanup kobject_del
3 locks held by kworker/1:5/368:
kobject: 'rx-12' (000000006692218f): calling ktype release
 #0: 000000000ff41332 ((wq_completion)"events"){+.+.}, at: __write_once_size include/linux/compiler.h:218 [inline]
 #0: 000000000ff41332 ((wq_completion)"events"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: 000000000ff41332 ((wq_completion)"events"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline]
 #0: 000000000ff41332 ((wq_completion)"events"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline]
 #0: 000000000ff41332 ((wq_completion)"events"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline]
 #0: 000000000ff41332 ((wq_completion)"events"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
 #0: 000000000ff41332 ((wq_completion)"events"){+.+.}, at: process_one_work+0xbc7/0x1ce0 kernel/workqueue.c:2124
kobject: 'rx-12': free name
 #1: 0000000037b7be74 (deferred_process_work){+.+.}, at: process_one_work+0xc1d/0x1ce0 kernel/workqueue.c:2128
kobject: 'rx-11' (00000000b10bc88e): kobject_cleanup, parent 00000000f71d413c
 #2: 00000000e1fddd4d (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77
kobject: 'rx-11' (00000000b10bc88e): auto cleanup 'remove' event
3 locks held by kworker/1:6/3828:
kobject: 'rx-11' (00000000b10bc88e): kobject_uevent_env
 #0: 000000000ff41332 ((wq_completion)"events"){+.+.}, at: __write_once_size include/linux/compiler.h:218 [inline]
 #0: 000000000ff41332 ((wq_completion)"events"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: 000000000ff41332 ((wq_completion)"events"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline]
 #0: 000000000ff41332 ((wq_completion)"events"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline]
 #0: 000000000ff41332 ((wq_completion)"events"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline]
 #0: 000000000ff41332 ((wq_completion)"events"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
 #0: 000000000ff41332 ((wq_completion)"events"){+.+.}, at: process_one_work+0xbc7/0x1ce0 kernel/workqueue.c:2124
kobject: 'rx-11' (00000000b10bc88e): kobject_uevent_env: uevent_suppress caused the event to drop!
 #1: 00000000911c29bd ((linkwatch_work).work){+.+.}, at: process_one_work+0xc1d/0x1ce0 kernel/workqueue.c:2128
kobject: 'rx-11' (00000000b10bc88e): auto cleanup kobject_del
 #2: 00000000e1fddd4d (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77
kobject: 'rx-11' (00000000b10bc88e): calling ktype release
1 lock held by syz-executor0/10047:
kobject: 'rx-11': free name
 #0: 00000000e1fddd4d (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline]
 #0: 00000000e1fddd4d (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x425/0xc30 net/core/rtnetlink.c:5127
kobject: 'rx-10' (000000005c286809): kobject_cleanup, parent 00000000f71d413c
1 lock held by syz-executor0/10062:
kobject: 'rx-10' (000000005c286809): auto cleanup 'remove' event
 #0: 00000000e1fddd4d (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline]
 #0: 00000000e1fddd4d (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x425/0xc30 net/core/rtnetlink.c:5127
kobject: 'rx-10' (000000005c286809): kobject_uevent_env
1 lock held by syz-executor3/10057:
kobject: 'rx-10' (000000005c286809): kobject_uevent_env: uevent_suppress caused the event to drop!
 #0: 00000000e1fddd4d (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline]
 #0: 00000000e1fddd4d (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x425/0xc30 net/core/rtnetlink.c:5127
kobject: 'rx-10' (000000005c286809): auto cleanup kobject_del
1 lock held by syz-executor3/10060:
kobject: 'rx-10' (000000005c286809): calling ktype release
 #0: 00000000e1fddd4d (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline]
 #0: 00000000e1fddd4d (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x425/0xc30 net/core/rtnetlink.c:5127
kobject: 'rx-10': free name
1 lock held by syz-executor2/10052:
kobject: 'rx-9' (00000000b4089156): kobject_cleanup, parent 00000000f71d413c
 #0: 00000000e1fddd4d (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline]
 #0: 00000000e1fddd4d (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x425/0xc30 net/core/rtnetlink.c:5127
kobject: 'rx-9' (00000000b4089156): auto cleanup 'remove' event
1 lock held by syz-executor2/10067:
kobject: 'rx-9' (00000000b4089156): kobject_uevent_env
 #0: 00000000e1fddd4d (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline]
 #0: 00000000e1fddd4d (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x425/0xc30 net/core/rtnetlink.c:5127
kobject: 'rx-9' (00000000b4089156): kobject_uevent_env: uevent_suppress caused the event to drop!
1 lock held by syz-executor5/10053:
kobject: 'rx-9' (00000000b4089156): auto cleanup kobject_del
 #0: 00000000e1fddd4d (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline]
 #0: 00000000e1fddd4d (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x425/0xc30 net/core/rtnetlink.c:5127
kobject: 'rx-9' (00000000b4089156): calling ktype release

kobject: 'rx-9': free name
=============================================

kobject: 'rx-8' (000000003057acfb): kobject_cleanup, parent 00000000f71d413c
NMI backtrace for cpu 1
kobject: 'rx-8' (000000003057acfb): auto cleanup 'remove' event
CPU: 1 PID: 1041 Comm: khungtaskd Not tainted 5.0.0-rc1+ #22
kobject: 'rx-8' (000000003057acfb): kobject_uevent_env
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
kobject: 'rx-8' (000000003057acfb): kobject_uevent_env: uevent_suppress caused the event to drop!
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1db/0x2d0 lib/dump_stack.c:113
kobject: 'rx-8' (000000003057acfb): auto cleanup kobject_del
 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
kobject: 'rx-8' (000000003057acfb): calling ktype release
kobject: 'rx-8': free name
 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
 watchdog+0xbbb/0x1170 kernel/hung_task.c:287
kobject: 'rx-7' (00000000a6b10355): kobject_cleanup, parent 00000000f71d413c
kobject: 'rx-7' (00000000a6b10355): auto cleanup 'remove' event
kobject: 'rx-7' (00000000a6b10355): kobject_uevent_env
kobject: 'rx-7' (00000000a6b10355): kobject_uevent_env: uevent_suppress caused the event to drop!
 kthread+0x357/0x430 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 1 to CPUs 0:
kobject: 'rx-7' (00000000a6b10355): auto cleanup kobject_del
NMI backtrace for cpu 0
CPU: 0 PID: 28045 Comm: kworker/u4:1 Not tainted 5.0.0-rc1+ #22
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:io_serial_in+0x6b/0x90 drivers/tty/serial/8250/8250_port.c:450
Code: e9 00 00 00 49 8d 7c 24 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 d3 e3 80 3c 02 00 75 17 41 03 5c 24 38 89 da ec <5b> 0f b6 c0 41 5c 5d c3 e8 58 4f e4 fd eb c2 e8 b1 4f e4 fd eb e2
RSP: 0018:ffff88820aea6cf8 EFLAGS: 00000002
RAX: dffffc0000000000 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: ffffffff83e192e1 RDI: ffffffff8bf721f8
RBP: ffff88820aea6d08 R08: ffff88820ae9a500 R09: ffffed10415d4da6
R10: ffffed10415d4da5 R11: 0000000000000003 R12: ffffffff8bf721c0
R13: 0000000000000020 R14: ffffffff8bf721c0 R15: fffffbfff17ee441
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000457e9f CR3: 00000000a7cb5000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 serial_in drivers/tty/serial/8250/8250.h:111 [inline]
 wait_for_xmitr+0xa7/0x250 drivers/tty/serial/8250/8250_port.c:2028
 serial8250_console_putchar+0x20/0x60 drivers/tty/serial/8250/8250_port.c:3199
 uart_console_write+0x57/0x120 drivers/tty/serial/serial_core.c:1907
 serial8250_console_write+0x6d5/0xab0 drivers/tty/serial/8250/8250_port.c:3263
 univ8250_console_write+0x5f/0x70 drivers/tty/serial/8250/8250_core.c:586
 call_console_drivers kernel/printk/printk.c:1737 [inline]
 console_unlock+0xcff/0x11e0 kernel/printk/printk.c:2408
 vprintk_emit+0x370/0x960 kernel/printk/printk.c:1931
 vprintk_default+0x28/0x30 kernel/printk/printk.c:1958
 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398
 printk+0xba/0xed kernel/printk/printk.c:1991
 kobject_cleanup lib/kobject.c:654 [inline]
 kobject_release lib/kobject.c:691 [inline]
 kref_put include/linux/kref.h:67 [inline]
 kobject_put.cold+0x1f1/0x2ec lib/kobject.c:708
 net_rx_queue_update_kobjects+0x431/0x620 net/core/net-sysfs.c:978
 remove_queue_kobjects net/core/net-sysfs.c:1562 [inline]
 netdev_unregister_kobject+0x1e7/0x2e0 net/core/net-sysfs.c:1713
 rollback_registered_many+0x946/0x1370 net/core/dev.c:8126
 unregister_netdevice_many.part.0+0x8e/0x470 net/core/dev.c:9207
 unregister_netdevice_many net/core/dev.c:9206 [inline]
 default_device_exit_batch+0x4c9/0x5f0 net/core/dev.c:9676
 ops_exit_list.isra.0+0x105/0x160 net/core/net_namespace.c:156
 cleanup_net+0x51d/0xb10 net/core/net_namespace.c:551
 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153
 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296
 kthread+0x357/0x430 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.401 msecs
All crashes (15):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Maintainers
ci-upstream-kasan-gce-root	2019/01/13 05:06	upstream	66c56cfa	c3f3344c	.config	log	report	christian@brauner.io, davem@davemloft.net, dsahern@gmail.com, jakub.kicinski@netronome.com, ktkhai@virtuozzo.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, roopa@cumulusnetworks.com
ci-upstream-kasan-gce	2018/12/03 21:14	upstream	25956467	819002b0	.config	log	report	christian@brauner.io, davem@davemloft.net, dsahern@gmail.com, fw@strlen.de, jakub.kicinski@netronome.com, ktkhai@virtuozzo.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-root	2018/11/25 03:51	upstream	e195ca6c	ecc7c870	.config	log	report	christian@brauner.io, daniel@iogearbox.net, davem@davemloft.net, dsahern@gmail.com, fw@strlen.de, jakub.kicinski@netronome.com, ktkhai@virtuozzo.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-selinux-root	2018/10/20 09:12	upstream	270b77a0	ecb386fe	.config	log	report	christian.brauner@ubuntu.com, davem@davemloft.net, fw@strlen.de, jakub.kicinski@netronome.com, jbenc@redhat.com, ktkhai@virtuozzo.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, stephen@networkplumber.org
ci-upstream-kasan-gce-selinux-root	2018/10/04 15:37	upstream	cec4de30	8b311eaf	.config	log	report	christian.brauner@ubuntu.com, davem@davemloft.net, dsahern@gmail.com, fw@strlen.de, jakub.kicinski@netronome.com, jbenc@redhat.com, ktkhai@virtuozzo.com, linux-kernel@vger.kernel.org, lucien.xin@gmail.com, netdev@vger.kernel.org, nicolas.dichtel@6wind.com
ci-upstream-net-this-kasan-gce	2018/12/21 19:48	net	f0c928d8	588075e6	.config	log	report	christian@brauner.io, daniel@iogearbox.net, davem@davemloft.net, dsahern@gmail.com, edumazet@google.com, jakub.kicinski@netronome.com, ktkhai@virtuozzo.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, xiyou.wangcong@gmail.com
ci-upstream-net-this-kasan-gce	2018/11/29 00:53	net	d78a5ebd	4b6d14f2	.config	log	report	christian@brauner.io, davem@davemloft.net, dsahern@gmail.com, fw@strlen.de, jakub.kicinski@netronome.com, ktkhai@virtuozzo.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-this-kasan-gce	2018/11/27 08:13	net	69500127	ac912200	.config	log	report	christian@brauner.io, davem@davemloft.net, dsahern@gmail.com, fw@strlen.de, jakub.kicinski@netronome.com, ktkhai@virtuozzo.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-this-kasan-gce	2018/10/28 17:55	net	6788fac8	6f9b225a	.config	log	report	christian@brauner.io, davem@davemloft.net, dsahern@gmail.com, fw@strlen.de, jakub.kicinski@netronome.com, jbenc@redhat.com, ktkhai@virtuozzo.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-this-kasan-gce	2018/09/30 07:11	net	43955a45	41e4b329	.config	log	report	christian.brauner@ubuntu.com, davem@davemloft.net, dsahern@gmail.com, fw@strlen.de, jakub.kicinski@netronome.com, jbenc@redhat.com, ktkhai@virtuozzo.com, linux-kernel@vger.kernel.org, lucien.xin@gmail.com, netdev@vger.kernel.org, nicolas.dichtel@6wind.com
ci-upstream-net-kasan-gce	2018/03/30 16:13	net-next	18845557	d47f0ed6	.config	log	report	christian.brauner@ubuntu.com, davem@davemloft.net, dsahern@gmail.com, fw@strlen.de, jbenc@redhat.com, ktkhai@virtuozzo.com, linux-kernel@vger.kernel.org, lucien.xin@gmail.com, netdev@vger.kernel.org, vyasevich@gmail.com
ci-upstream-net-kasan-gce	2018/12/13 04:08	net-next	3f9b7eee	02613a41	.config	log	report	christian@brauner.io, davem@davemloft.net, dsahern@gmail.com, edumazet@google.com, jakub.kicinski@netronome.com, ktkhai@virtuozzo.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-kasan-gce	2018/12/06 04:16	net-next	b255e500	764b42c4	.config	log	report	christian@brauner.io, davem@davemloft.net, dsahern@gmail.com, jakub.kicinski@netronome.com, ktkhai@virtuozzo.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, stephen@networkplumber.org
ci-upstream-net-kasan-gce	2018/12/02 06:44	net-next	97e6c858	5a581673	.config	log	report	christian@brauner.io, davem@davemloft.net, dsahern@gmail.com, fw@strlen.de, jakub.kicinski@netronome.com, ktkhai@virtuozzo.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-kasan-gce	2018/12/01 01:10	net-next	93029d7d	ade12e91	.config	log	report	christian@brauner.io, davem@davemloft.net, dsahern@gmail.com, fw@strlen.de, jakub.kicinski@netronome.com, ktkhai@virtuozzo.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org