[   54.428600][  T111] su (111) used greatest stack depth: 23552 bytes left
[   54.428625][  T111] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   54.428627][  T111] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 111, name: su
[   54.428629][  T111] preempt_count: 2, expected: 0
[   54.428630][  T111] RCU nest depth: 0, expected: 0
[   54.428631][  T111] locks held by su/111: 5, last CPU#3:
[   54.428633][  T111]  #0: ffffffff9ee02f58 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x8e7/0xef0
[   54.428646][  T111]  #1: ffffffff9ef6a440 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[   54.428652][  T111]  #2: ffffffff9ef6a4b8 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[   54.428655][  T111]  #3: ffffffff9ee89de0 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[   54.428658][  T111]  #4: ffffffff9ee89ce0 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0
[   54.428661][  T111] irq event stamp: 175926
[   54.428662][  T111] hardirqs last  enabled at (175925): [<ffffffff9bb73a46>] __down_trylock_console_sem+0x86/0xa0
[   54.428666][  T111] hardirqs last disabled at (175926): [<ffffffff9bb79af4>] console_emit_next_record+0x3d4/0x4c0
[   54.428667][  T111] softirqs last  enabled at (173264): [<ffffffff9b9d0d0c>] handle_softirqs+0x67c/0x900
[   54.428669][  T111] softirqs last disabled at (173259): [<ffffffff9b9d1145>]