===================================== WARNING: bad unlock balance detected! 4.14.102+ #17 Not tainted ------------------------------------- migration/1/16 is trying to release lock (&rq->lock) at: [] migration_cpu_stop+0x2dd/0x430 kernel/sched/core.c:1036 but there are no more locks to release! other info that might help us debug this: 1 lock held by migration/1/16: #0: (&p->pi_lock){-.-.}, at: [] migration_cpu_stop+0xe1/0x430 kernel/sched/core.c:1027 stack backtrace: CPU: 1 PID: 16 Comm: migration/1 Not tainted 4.14.102+ #17 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x10e lib/dump_stack.c:53 print_unlock_imbalance_bug kernel/locking/lockdep.c:3548 [inline] print_unlock_imbalance_bug.cold+0x110/0x11f kernel/locking/lockdep.c:3525 print_req_error: I/O error, dev loop0, sector 128 Buffer I/O error on dev loop0, logical block 16, lost async page write print_req_error: I/O error, dev loop0, sector 0 print_req_error: I/O error, dev loop0, sector 384 Buffer I/O error on dev loop0, logical block 48, lost async page write print_req_error: I/O error, dev loop0, sector 256 Buffer I/O error on dev loop0, logical block 32, lost async page write