rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P4253/1:b..l
	(detected by 0, t=10502 jiffies, g=6981, q=60)
task:udevd           state:R  running task     stack:    0 pid: 4253 ppid:  3652 flags:0x00000004
Call trace:
 __switch_to+0x2f4/0x558 arch/arm64/kernel/process.c:521
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0xe00/0x1c0c kernel/sched/core.c:6376
 preempt_schedule_common+0x138/0x218 kernel/sched/core.c:6552
 preempt_schedule+0x64/0x84 kernel/sched/core.c:6577
 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock+0xd8/0x11c kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:403 [inline]
 lockref_put_or_lock+0x7c/0xd0 lib/lockref.c:177
 fast_dput fs/dcache.c:754 [inline]
 dput+0x20c/0x458 fs/dcache.c:880
 shmem_unlink+0x1f8/0x240 mm/shmem.c:2957
 shmem_rename2+0x110/0x490 mm/shmem.c:3052
 vfs_rename+0x954/0xdcc fs/namei.c:4832
 do_renameat2+0x74c/0xcdc fs/namei.c:4985
 __do_sys_renameat fs/namei.c:5025 [inline]
 __se_sys_renameat fs/namei.c:5022 [inline]
 __arm64_sys_renameat+0xc8/0xe4 fs/namei.c:5022
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
rcu: rcu_preempt kthread starved for 10502 jiffies! g6981 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:    0 pid:   15 ppid:     2 flags:0x00000008
Call trace:
 __switch_to+0x2f4/0x558 arch/arm64/kernel/process.c:521
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0xe00/0x1c0c kernel/sched/core.c:6376
 schedule+0x11c/0x1c8 kernel/sched/core.c:6459
 schedule_timeout+0x180/0x2c8 kernel/time/timer.c:1914
 rcu_gp_fqs_loop+0x25c/0x11f0 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0xc4/0x2a8 kernel/rcu/tree.c:2145
 kthread+0x374/0x454 kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:855
rcu: Stack dump where RCU GP kthread last ran:
Task dump for CPU 1:
task:syz.1.17        state:R  running task     stack:    0 pid: 4258 ppid:  4162 flags:0x00000000
Call trace:
 __switch_to+0x2f4/0x558 arch/arm64/kernel/process.c:521
 .str.2+0xa09a22/0xc4b998