rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-...D } 2690 jiffies s: 2869 root: 0x1/. rcu: blocking rcu_node structures (internal RCU debug): Task dump for CPU 0: task:syz.2.723 state:R running task stack:0 pid:6376 ppid:4294 flags:0x0000000b Call trace: __switch_to+0x308/0x598 arch/arm64/kernel/process.c:553 0x0