rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P8531/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=18281, q=415429 ncpus=2)
task:udevd           state:R  running task     stack:0     pid:8531  tgid:8531  ppid:6134   task_flags:0x400140 flags:0x00000008
Call trace:
 __switch_to+0x414/0x834 arch/arm64/kernel/process.c:737 (T)
 context_switch kernel/sched/core.c:5396 [inline]
 __schedule+0x1414/0x2a28 kernel/sched/core.c:6785
 preempt_schedule_irq+0x80/0x188 kernel/sched/core.c:7108
 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)
 lock_acquire+0x178/0x2e0 kernel/locking/lockdep.c:5874 (P)
 rcu_lock_acquire+0x44/0x54 include/linux/rcupdate.h:331
 rcu_read_lock include/linux/rcupdate.h:841 [inline]
 __page_table_check_zero+0xac/0x414 mm/page_table_check.c:138
 page_table_check_free include/linux/page_table_check.h:43 [inline]
 free_pages_prepare mm/page_alloc.c:1249 [inline]
 __free_frozen_pages+0xc10/0xd2c mm/page_alloc.c:2706
 free_frozen_pages+0x14/0x20 mm/page_alloc.c:2744
 __free_slab+0x110/0x1e8 mm/slub.c:2688
 free_slab+0x24/0x120 mm/slub.c:2711
 discard_slab mm/slub.c:2717 [inline]
 __put_partials+0x19c/0x244 mm/slub.c:3186
 put_cpu_partial+0x164/0x1c0 mm/slub.c:3261
 __slab_free+0x1b0/0x280 mm/slub.c:4513
 do_slab_free mm/slub.c:4595 [inline]
 ___cache_free+0x150/0x170 mm/slub.c:4701
 qlink_free+0x48/0x94 mm/kasan/quarantine.c:163
 qlist_free_all+0x44/0xb8 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x118/0x124 mm/kasan/quarantine.c:286
 __kasan_kmalloc+0x2c/0xb4 mm/kasan/common.c:385
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __do_kmalloc_node mm/slub.c:4328 [inline]
 __kmalloc_noprof+0x2fc/0x4c8 mm/slub.c:4340
 kmalloc_noprof include/linux/slab.h:909 [inline]
 kzalloc_noprof include/linux/slab.h:1039 [inline]
 tomoyo_encode2 security/tomoyo/realpath.c:45 [inline]
 tomoyo_encode+0x274/0x4a4 security/tomoyo/realpath.c:80
 tomoyo_realpath_from_path+0x480/0x4d4 security/tomoyo/realpath.c:283
 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:941
 vfs_open+0x44/0x2d4 fs/open.c:1094
 do_open fs/namei.c:3887 [inline]
 path_openat+0x2424/0x2c40 fs/namei.c:4046
 do_filp_open+0x18c/0x36c fs/namei.c:4073
 do_sys_openat2+0x11c/0x1b4 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __arm64_sys_openat+0x120/0x158 fs/open.c:1463
 __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