[  122.378338][  T117] su (117) used greatest stack depth: 24072 bytes left
[  122.378356][  T117] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[  122.378358][  T117] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 117, name: su
[  122.378360][  T117] preempt_count: 2, expected: 0
[  122.378361][  T117] RCU nest depth: 0, expected: 0
[  122.378362][  T117] locks held by su/117: 5, last CPU#2:
[  122.378364][  T117]  #0: ffffffff85c167b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0