[   63.666035][  T109] su (109) used greatest stack depth: 24104 bytes left
[   63.666054][  T109] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[   63.666056][  T109] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 109, name: su
[   63.666058][  T109] preempt_count: 2, expected: 0
[   63.666059][  T109] RCU nest depth: 0, expected: 0
[   63.666060][  T109] locks held by su/109: 5, last CPU#2:
[   63.666062][  T109]  #0: ffffffffb5c027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0
[   63.666075][  T109]  #1: ffffffffb5d69cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0
[   63.666080][  T109]  #2: ffffffffb5d69d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710
[   63.666083][  T109]  #3: ffffffffb5c89660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60
[   63.666087][  T109]  #4: ffffffffb5c89560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0
[   63.666090][  T109] irq event stamp: 169784
[   63.666091][  T109] hardirqs last  enabled at (169783): [<ffffffffb2b6d546>] __down_trylock_console_sem+0x86/0xa0
[   63.666094][  T109] hardirqs last disabled at (169784): [<ffffffffb2b735f4>] console_emit_next_record+0x3d4/0x4c0
[   63.666096][  T109] softirqs last  enabled at (169716): [<ffffffffb29caa2c>]