[  137.921758][  T118] su (118) used greatest stack depth: 23376 bytes left
[  137.921774][  T118] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[  137.921776][  T118] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 118, name: su
[  137.921777][  T118] preempt_count: 2, expected: 0
[  137.921778][  T118] RCU nest depth: 0, expected: 0
[  137.921779][  T118] locks held by su/118: 5, last CPU#1:
[  137.921781][  T118]  #0: ffffffff9aa167b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[  137.921792][  T118]  #1: ffffffff9ab7ddc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[  137.921797][  T118]  #2: ffffffff9ab7de38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[  137.921801][  T118]  #3: ffffffff9aa9d760 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[  137.921805][  T118]  #4: ffffffff9aa9d660 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0
[  137.921809][  T118] irq event stamp: 188910
[  137.921809][  T118] hardirqs last  enabled at (188909): [<ffffffff96f86626>] __down_trylock_console_sem+0x86/0xa0
[  137.921813][  T118] hardirqs last disabled at (188910): [<ffffffff96f8c6c4>] console_emit_next_record+0x3d4/0x4c0
[  137.921814][  T118] softirqs last  enabled at (186958): [<ffffffff96de0d0c>] handle_softirqs+0x67c/0x900
[  137.921816][  T118] softirqs last disabled at (186953): [<ffffffff96de1145>] __irq_exit_rcu+0x145/0x1c0
[  137.921819][  T118] Preemption disabled at: