[   76.997698][  T117] su (117) used greatest stack depth: 24072 bytes left
[   76.997715][  T117] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   76.997717][  T117] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 117, name: su
[   76.997718][  T117] preempt_count: 2, expected: 0
[   76.997719][  T117] RCU nest depth: 0, expected: 0
[   76.997720][  T117] locks held by su/117: 5, last CPU#0:
[   76.997722][  T117]  #0: ffffffff858167b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[   76.997733][  T117]  #1: ffffffff8597ddc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[   76.997738][  T117]  #2: ffffffff8597de38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[   76.997742][  T117]  #3: ffffffff8589d760 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[   76.997745][  T117]  #4: ffffffff8589d660 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0
[   76.997749][  T117] irq event stamp: 164248
[   76.997750][  T117] hardirqs last  enabled at (164247): [<ffffffff81d86626>] __down_trylock_console_sem+0x86/0xa0
[   76.997753][  T117] hardirqs last disabled at (164248): [<ffffffff81d8c6c4>] console_emit_next_record+0x3d4/0x4c0
[   76.997755][  T117] softirqs last  enabled at (162358): [<fff