rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P30867 (detected by 1, t=10504 jiffies, g=129169, q=1776) task:syz.6.7981 state:R running task stack:25360 pid:30867 ppid: 25930 flags:0x0000400a Call Trace: