<3>[84298.823786] INFO: task cron:43921 blocked for more than 300 seconds.
<3>[84298.823820]       Not tainted 4.4.171-70.1 #1
<3>[84298.825025] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
<6>[84298.826213] cron            D ffff88376770fc18     0 43921  32632 0x00000000
<4>[84298.826218] Call Trace:
<4>[84298.826227]  schedule+0x40/0x90
<4>[84298.826229]  schedule_preempt_disabled+0x15/0x20
<4>[84298.826232]  __mutex_lock_slowpath+0xab/0x120
<4>[84298.826234]  mutex_lock+0x36/0x4a
<4>[84298.826239]  path_openat+0x4d1/0x1290
<4>[84298.826245]  ? __might_sleep+0x52/0x90
<4>[84298.826250]  ? page_add_file_rmap+0x21/0x60
<4>[84298.826253]  ? do_set_pte+0xda/0x120
<4>[84298.826256]  do_filp_open+0x85/0xe0
<4>[84298.826260]  ? __alloc_fd+0x128/0x190
<4>[84298.826264]  do_sys_open+0x136/0x220
<4>[84298.826266]  SyS_open+0x1e/0x20
<4>[84298.826268]  entry_SYSCALL_64_fastpath+0x22/0x9d
