rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P32720/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=332721, q=493 ncpus=2)
task:dhcpcd-run-hook state:R  running task     stack:28640 pid:32720 tgid:32720 ppid:32694  flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0xe37/0x5490 kernel/sched/core.c:6529
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:6851
 irqentry_exit+0x36/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x1f2/0x560 kernel/locking/lockdep.c:5727
Code: c1 05 3a 13 9a 7e 83 f8 01 0f 85 ea 02 00 00 9c 58 f6 c4 02 0f 85 d5 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc9000312f7c8 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000625efb RCX: 0000000000000001
RDX: 0000000000000001 RSI: ffffffff8b4cc880 RDI: ffffffff8bb08c00
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff28c4cd8
R10: ffffffff946266c7 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8ddb5220 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 rcu_read_lock include/linux/rcupdate.h:838 [inline]
 path_init+0x6f6/0x1a90 fs/namei.c:2437
 path_lookupat+0x33/0x770 fs/namei.c:2556
 filename_lookup+0x1e5/0x5b0 fs/namei.c:2595
 kern_path+0x35/0x50 fs/namei.c:2703
 tomoyo_realpath_nofollow+0x88/0x100 security/tomoyo/realpath.c:303
 tomoyo_find_next_domain+0x2b3/0x2020 security/tomoyo/domain.c:727
 tomoyo_bprm_check_security security/tomoyo/tomoyo.c:102 [inline]
 tomoyo_bprm_check_security+0x12e/0x1d0 security/tomoyo/tomoyo.c:92
 security_bprm_check+0x65/0xb0 security/security.c:1191
 search_binary_handler fs/exec.c:1809 [inline]
 exec_binprm fs/exec.c:1863 [inline]
 bprm_execve fs/exec.c:1914 [inline]
 bprm_execve+0x642/0x1960 fs/exec.c:1890
 do_execveat_common.isra.0+0x4f1/0x630 fs/exec.c:2021
 do_execve fs/exec.c:2095 [inline]
 __do_sys_execve fs/exec.c:2171 [inline]
 __se_sys_execve fs/exec.c:2166 [inline]
 __x64_sys_execve+0x8c/0xb0 fs/exec.c:2166
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faf8cf11ef7
RSP: 002b:00007ffd1c178f18 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 000055f412e70be8 RCX: 00007faf8cf11ef7
RDX: 000055f412e70c08 RSI: 000055f412e70be8 RDI: 000055f412e70c90
RBP: 000055f412e70c90 R08: 000055f412e70c95 R09: 00007ffd1c17ceb4
R10: 0000000000000008 R11: 0000000000000246 R12: 000055f412e70c08
R13: 00007faf8d0bf904 R14: 000055f412e70c08 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 9930 jiffies! g332721 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:28032 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0xe37/0x5490 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6621
 schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2034
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2236
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:111