rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6854/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=14441, q=1351 ncpus=2)
task:udevd           state:R  running task     stack:0     pid:6854  tgid:6854  ppid:6107   task_flags:0x400140 flags:0x00000008
Call trace:
 __switch_to+0x404/0x778 arch/arm64/kernel/process.c:701 (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:563 [inline]
 el1_interrupt+0x3c/0x54 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
 __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] (P)
 arch_local_irq_restore+0x8/0xc arch/arm64/include/asm/irqflags.h:195 (P)
 lock_is_held include/linux/lockdep.h:249 [inline]
 rcu_read_lock_held+0x34/0x50 kernel/rcu/update.c:351
 xa_entry include/linux/xarray.h:1220 [inline]
 xas_find+0x3b4/0x81c lib/xarray.c:1423
 find_get_entry mm/filemap.c:2025 [inline]
 find_lock_entries+0x1a4/0xa08 mm/filemap.c:2129
 truncate_inode_pages_range+0x170/0xdec mm/truncate.c:371
 truncate_inode_pages+0x2c/0x3c mm/truncate.c:456
 kill_bdev block/bdev.c:91 [inline]
 blkdev_flush_mapping+0xfc/0x254 block/bdev.c:712
 blkdev_put_whole block/bdev.c:719 [inline]
 bdev_release+0x478/0x654 block/bdev.c:1144
 blkdev_release+0x20/0x34 block/fops.c:660
 __fput+0x340/0x75c fs/file_table.c:465
 fput_close_sync+0x100/0x224 fs/file_table.c:570
 __do_sys_close fs/open.c:1581 [inline]
 __se_sys_close fs/open.c:1566 [inline]
 __arm64_sys_close+0x7c/0x118 fs/open.c:1566
 __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+0x58/0x150 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600