rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6106/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=7421, q=245778 ncpus=2)
task:udevd           state:R  running task     stack:0     pid:6106  tgid:6106  ppid:1      task_flags:0x400140 flags:0x00000018
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
 lookup_page_ext mm/page_ext.c:252 [inline] (P)
 page_ext_lookup+0xd8/0x164 mm/page_ext.c:520 (P)
 page_ext_iter_begin include/linux/page_ext.h:132 [inline]
 __page_table_check_zero+0x180/0x414 mm/page_table_check.c:139
 page_table_check_free include/linux/page_table_check.h:43 [inline]
 free_pages_prepare mm/page_alloc.c:1259 [inline]
 __free_frozen_pages+0xc0c/0xd14 mm/page_alloc.c:2721
 free_frozen_pages+0x14/0x20 mm/page_alloc.c:2759
 __free_slab+0x110/0x1e8 mm/slub.c:2687
 free_slab+0x24/0x120 mm/slub.c:2710
 discard_slab+0x50/0xb8 mm/slub.c:2716
 __slab_free+0x1dc/0x280 mm/slub.c:4553
 do_slab_free mm/slub.c:4594 [inline]
 ___cache_free+0x150/0x170 mm/slub.c:4700
 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/0x88 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4147 [inline]
 slab_alloc_node mm/slub.c:4196 [inline]
 kmem_cache_alloc_noprof+0x238/0x3e8 mm/slub.c:4203
 alloc_empty_file+0x60/0x1c0 fs/file_table.c:234
 path_openat+0xd0/0x2c40 fs/namei.c:4025
 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