Untitled

[  242.517621] INFO: task kworker/u8:4:176 blocked for more than 120 seconds.

[  242.517635]       Not tainted 4.13.1-041301-generic #201709100232

[  242.517640] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

[  242.517645] kworker/u8:4    D    0   176      2 0x00000000

[  242.517717] Workqueue: phy0 ieee80211_ba_session_work [mac80211]

[  242.517722] Call Trace:

[  242.517737]  __schedule+0x28b/0x890

[  242.517744]  schedule+0x36/0x80

[  242.517751]  schedule_preempt_disabled+0xe/0x10

[  242.517758]  __mutex_lock.isra.2+0x190/0x4e0

[  242.517766]  ? check_preempt_curr+0x7d/0x90

[  242.517772]  ? ttwu_do_wakeup+0x1e/0x140

[  242.517781]  __mutex_lock_slowpath+0x13/0x20

[  242.517787]  ? __mutex_lock_slowpath+0x13/0x20

[  242.517793]  mutex_lock+0x2f/0x40

[  242.517843]  __ieee80211_start_rx_ba_session+0x1b7/0x5a0 [mac80211]

[  242.517849]  ? dequeue_entity+0xed/0x4b0

[  242.517894]  ieee80211_ba_session_work+0x164/0x250 [mac80211]

[  242.517904]  process_one_work+0x1e7/0x410

[  242.517912]  worker_thread+0x4a/0x410

[  242.517919]  kthread+0x125/0x140

[  242.517926]  ? process_one_work+0x410/0x410

[  242.517931]  ? kthread_create_on_node+0x70/0x70

[  242.517940]  ? devm_remove_action+0x70/0x70

[  242.517948]  ret_from_fork+0x25/0x30

[  363.318081] INFO: task kworker/u8:4:176 blocked for more than 120 seconds.

[  363.318098]       Not tainted 4.13.1-041301-generic #201709100232

[  363.318104] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

[  363.318111] kworker/u8:4    D    0   176      2 0x00000000

[  363.318210] Workqueue: phy0 ieee80211_ba_session_work [mac80211]

[  363.318216] Call Trace:

[  363.318235]  __schedule+0x28b/0x890

[  363.318245]  schedule+0x36/0x80

[  363.318253]  schedule_preempt_disabled+0xe/0x10

[  363.318262]  __mutex_lock.isra.2+0x190/0x4e0

[  363.318272]  ? check_preempt_curr+0x7d/0x90

[  363.318280]  ? ttwu_do_wakeup+0x1e/0x140

[  363.318292]  __mutex_lock_slowpath+0x13/0x20

[  363.318300]  ? __mutex_lock_slowpath+0x13/0x20

[  363.318307]  mutex_lock+0x2f/0x40

[  363.318378]  __ieee80211_start_rx_ba_session+0x1b7/0x5a0 [mac80211]

[  363.318387]  ? dequeue_entity+0xed/0x4b0

[  363.318446]  ieee80211_ba_session_work+0x164/0x250 [mac80211]

[  363.318459]  process_one_work+0x1e7/0x410

[  363.318469]  worker_thread+0x4a/0x410

[  363.318477]  kthread+0x125/0x140

[  363.318486]  ? process_one_work+0x410/0x410

[  363.318492]  ? kthread_create_on_node+0x70/0x70

[  363.318504]  ? devm_remove_action+0x70/0x70

[  363.318515]  ret_from_fork+0x25/0x30