rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6489/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=17713, q=1392 ncpus=1)
task:udevd           state:R  running task     stack:0     pid:6489  tgid:6489  ppid:4342   task_flags:0x400140 flags:0x00800000
Call trace:
 __switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:775 (T)
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x1370/0x2d80 kernel/sched/core.c:7234
 preempt_schedule_irq+0x74/0x174 kernel/sched/core.c:7556
 raw_irqentry_exit_cond_resched+0x30/0x40 kernel/entry/common.c:145
 irqentry_exit_to_kernel_mode_preempt+0x44/0x54 include/linux/irq-entry-common.h:468
 arm64_exit_to_kernel_mode+0x3c/0x94 arch/arm64/kernel/entry-common.c:59
 __el1_irq arch/arm64/kernel/entry-common.c:512 [inline]
 el1_interrupt+0x4c/0x60 arch/arm64/kernel/entry-common.c:522
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:527
 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:590
 lock_release+0x30/0x3b0 kernel/locking/lockdep.c:5876 (P)
 rcu_lock_release include/linux/rcupdate.h:310 [inline]
 rcu_read_unlock include/linux/rcupdate.h:871 [inline]
 leave_rcu+0x110/0x170 fs/namei.c:840
 try_to_unlazy+0x10c/0x300 fs/namei.c:952
 may_lookup fs/namei.c:1970 [inline]
 link_path_walk+0x928/0x1584 fs/namei.c:2604
 path_openat+0x1b4/0x2a60 fs/namei.c:4859
 do_file_open+0x1c8/0x2e8 fs/namei.c:4892
 do_sys_openat2+0x114/0x1e8 fs/open.c:1368
 do_sys_open+0xb0/0xe0 fs/open.c:1374
 __do_sys_openat fs/open.c:1390 [inline]
 __se_sys_openat fs/open.c:1385 [inline]
 __arm64_sys_openat+0xa8/0xc4 fs/open.c:1385
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594