rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P15164/1:b.el
rcu: 	(detected by 0, t=10003 jiffies, g=13461, q=6724 ncpus=2)
task:udevd           state:R  running task     stack:0     pid:15164 tgid:15164 ppid:109    flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5945 [inline]
 __schedule+0x132b/0x1e00 kernel/sched/core.c:7789
 preempt_schedule_irq+0x9c/0x100 kernel/sched/core.c:8115
 raw_irqentry_exit_cond_resched+0x33/0x40 kernel/entry/common.c:311
 irqentry_exit+0x4a/0x60 kernel/entry/common.c:354
 sysvec_apic_timer_interrupt+0x50/0x90 arch/x86/kernel/apic/apic.c:1049
 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0010:memcpy_orig+0x97/0x150 arch/x86/lib/memcpy_64.S:113
Code: 8b 56 e8 4c 8b 5e e0 48 8d 76 e0 4c 89 47 f8 4c 89 4f f0 4c 89 57 e8 4c 89 5f e0 48 8d 7f e0 73 d2 83 c2 20 48 29 d6 48 29 d7 <83> fa 10 72 34 4c 8b 06 4c 8b 4e 08 4c 8b 54 16 f0 4c 8b 5c 16 f8
RSP: 0018:ffffc90005a2f9d0 EFLAGS: 00000287
RAX: ffffc90005a2fb60 RBX: 0000000000000010 RCX: ffffffff81eaa538
RDX: 0000000000000010 RSI: ffffc90005a2fb80 RDI: ffffc90005a2fb60
RBP: ffffc90005a2fa00 R08: ffffc90005a2fb6f R09: 1ffff92000b45f6d
R10: dffffc0000000000 R11: fffff52000b45f6e R12: 0000000000000000
R13: ffffffff81eaa538 R14: ffffc90005a2fb80 R15: ffffc90005a2fb60
 nd_jump_root+0x198/0x480 fs/namei.c:981
 path_init+0x3d5/0x12a0 fs/namei.c:2482
 path_parentat fs/namei.c:2626 [inline]
 __filename_parentat+0x1fb/0x620 fs/namei.c:2651
 filename_parentat fs/namei.c:2669 [inline]
 do_renameat2+0x25a/0xc80 fs/namei.c:5082
 __do_sys_rename fs/namei.c:5217 [inline]
 __se_sys_rename fs/namei.c:5215 [inline]
 __x64_sys_rename+0x86/0xa0 fs/namei.c:5215
 x64_sys_call+0x150b/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:83
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f87739b4cc7
RSP: 002b:00007fff8f6410c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 000055676a2df720 RCX: 00007f87739b4cc7
RDX: 000055676a091010 RSI: 00007fff8f6410e0 RDI: 00007fff8f6414e0
RBP: 000055676a2d9ca0 R08: 00000000000001e0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00007fff8f6410e0
R13: 00007fff8f6414e0 R14: 0000000000000000 R15: 000055676a2e6fa0
 </TASK>