[   95.130042][  T117] su (117) used greatest stack depth: 24072 bytes left
[   95.130061][  T117] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   95.130063][  T117] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 117, name: su
[   95.130064][  T117] preempt_count: 2, expected: 0
[   95.130065][  T117] RCU nest depth: 0, expected: 0
[   95.130066][  T117] locks held by su/117: 5, last CPU#3:
[   95.130068][  T117]  #0: ffffffff9b4167b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0