rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...0: (1 GPs behind) idle=34d/1/0x4000000000000002 softirq=9369/9370 fqs=5250 
	(detected by 1, t=10502 jiffies, g=10761, q=680)
Task dump for CPU 0:
task:udevd           state:R  running task     stack:    0 pid: 4872 ppid:  3645 flags:0x00000002
Call trace:
 __switch_to+0x308/0x588 arch/arm64/kernel/process.c:518
 0x4
 0xffff0000c0b1f520