rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6087/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=19181, q=842 ncpus=2)
task:udevd           state:R  running task     stack:0     pid:6087  tgid:6087  ppid:1      task_flags:0x400140 flags:0x00000004
Call trace:
 __switch_to+0x414/0x788 arch/arm64/kernel/process.c:701 (T)
 context_switch kernel/sched/core.c:5378 [inline]
 __schedule+0x1360/0x257c kernel/sched/core.c:6765
 preempt_schedule_irq+0x80/0x188 kernel/sched/core.c:7087
 arm64_preempt_schedule_irq arch/arm64/kernel/entry-common.c:301 [inline]
 __el1_irq arch/arm64/kernel/entry-common.c:563 [inline]
 el1_interrupt+0x4c/0x68 arch/arm64/kernel/entry-common.c:575
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:580
 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:596
 bytes_is_nonzero mm/kasan/generic.c:87 [inline] (P)
 memory_is_nonzero mm/kasan/generic.c:104 [inline] (P)
 memory_is_poisoned_n mm/kasan/generic.c:129 [inline] (P)
 memory_is_poisoned mm/kasan/generic.c:161 [inline] (P)
 check_region_inline mm/kasan/generic.c:180 [inline] (P)
 kasan_check_range+0x7c/0x2a8 mm/kasan/generic.c:189 (P)
 __kasan_check_read+0x20/0x30 mm/kasan/shadow.c:31
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
 __page_table_check_zero+0x130/0x250 mm/page_table_check.c:156
 page_table_check_free include/linux/page_table_check.h:41 [inline]
 free_pages_prepare mm/page_alloc.c:1128 [inline]
 free_frozen_pages+0xec0/0x1014 mm/page_alloc.c:2660
 __free_slab+0x118/0x1f0 mm/slub.c:2655
 free_slab+0x2c/0x100 mm/slub.c:2678
 discard_slab+0x54/0xbc mm/slub.c:2684
 __slab_free+0x1d4/0x278 mm/slub.c:4520
 do_slab_free mm/slub.c:4561 [inline]
 ___cache_free+0x144/0x16c mm/slub.c:4667
 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_slab_alloc+0x2c/0x8c mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4115 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 __do_kmalloc_node mm/slub.c:4293 [inline]
 __kmalloc_noprof+0x2d8/0x54c mm/slub.c:4306
 kmalloc_noprof include/linux/slab.h:905 [inline]
 kzalloc_noprof include/linux/slab.h:1037 [inline]
 tomoyo_encode2 security/tomoyo/realpath.c:45 [inline]
 tomoyo_encode+0x270/0x4b0 security/tomoyo/realpath.c:80
 tomoyo_realpath_from_path+0x478/0x4cc security/tomoyo/realpath.c:283
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_perm+0x218/0x4c0 security/tomoyo/file.c:822
 tomoyo_inode_getattr+0x28/0x38 security/tomoyo/tomoyo.c:123
 security_inode_getattr+0x118/0x320 security/security.c:2377
 vfs_getattr fs/stat.c:243 [inline]
 vfs_statx_path+0x38/0x294 fs/stat.c:283
 vfs_statx+0x124/0x1e4 fs/stat.c:349
 vfs_fstatat+0xdc/0x15c fs/stat.c:368
 __do_sys_newfstatat fs/stat.c:532 [inline]
 __se_sys_newfstatat fs/stat.c:526 [inline]
 __arm64_sys_newfstatat+0x10c/0x190 fs/stat.c:526
 __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+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600