rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6105/2:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=9569, q=2467494 ncpus=2)
task:udevd           state:R  running task     stack:0     pid:6105  tgid:6105  ppid:1      task_flags:0x400140 flags:0x00000008
Call trace:
 __switch_to+0x414/0x834 arch/arm64/kernel/process.c:735 (T)
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x13b0/0x28d4 kernel/sched/core.c:6767
 preempt_schedule_irq+0x80/0x188 kernel/sched/core.c:7090
 arm64_preempt_schedule_irq+0x44/0x58 arch/arm64/kernel/entry-common.c:301
 __el1_irq arch/arm64/kernel/entry-common.c:586 [inline]
 el1_interrupt+0x3c/0x54 arch/arm64/kernel/entry-common.c:598
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:603
 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:596
 __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] (P)
 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] (P)
 seqcount_lockdep_reader_access+0xd8/0xf8 include/linux/seqlock.h:74 (P)
 read_seqbegin include/linux/seqlock.h:836 [inline]
 read_seqbegin_or_lock include/linux/seqlock.h:1130 [inline]
 prepend_path+0x214/0x88c fs/d_path.c:171
 d_absolute_path+0xa0/0x148 fs/d_path.c:234
 tomoyo_get_absolute_path security/tomoyo/realpath.c:101 [inline]
 tomoyo_realpath_from_path+0x258/0x4d4 security/tomoyo/realpath.c:271
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_check_open_permission+0x178/0x31c security/tomoyo/file.c:771
 tomoyo_file_open+0x154/0x1ec security/tomoyo/tomoyo.c:334
 security_file_open+0xc8/0x298 security/security.c:3114
 do_dentry_open+0x2b8/0x1544 fs/open.c:933
 vfs_open+0x44/0x2d4 fs/open.c:1086
 do_open fs/namei.c:3880 [inline]
 path_openat+0x2424/0x2c40 fs/namei.c:4039
 do_filp_open+0x18c/0x36c fs/namei.c:4066
 do_sys_openat2+0x11c/0x1b4 fs/open.c:1429
 do_sys_open fs/open.c:1444 [inline]
 __do_sys_openat fs/open.c:1460 [inline]
 __se_sys_openat fs/open.c:1455 [inline]
 __arm64_sys_openat+0x120/0x158 fs/open.c:1455
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767
 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600