rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6589/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=81089, q=300 ncpus=2)
task:udevd           state:R  running task     stack:21632 pid:6589  tgid:6589  ppid:4547   flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6529
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:latch_tree_find include/linux/rbtree_latch.h:208 [inline]
RIP: 0010:bpf_ksym_find kernel/bpf/core.c:735 [inline]
RIP: 0010:is_bpf_text_address+0x14d/0x2a0 kernel/bpf/core.c:768
Code: 3c 28 00 74 08 4c 89 e7 e8 70 93 57 00 4d 8b 24 24 4c 89 e7 4c 89 fe e8 91 59 f1 ff 4d 39 fc 76 0b e8 27 57 f1 ff 48 83 c3 10 <eb> 3e 4c 8d 34 2b 4d 8d a6 e8 fd ff ff 4c 89 e0 48 c1 e8 03 42 80
RSP: 0018:ffffc9000490f840 EFLAGS: 00000282
RAX: ffffffff81a1f2d9 RBX: ffff888062cd2380 RCX: ffff88802290da00
RDX: 0000000000000000 RSI: 00007f1b5ed19fcc RDI: ffffffffa0000814
RBP: 0000000000000000 R08: ffffffff81a1f2cf R09: 1ffffffff25fe0c0
R10: dffffc0000000000 R11: fffffbfff25fe0c1 R12: ffffffffa0000814
R13: dffffc0000000000 R14: 0000000000000001 R15: 00007f1b5ed19fcc
 kernel_text_address+0xa7/0xe0 kernel/extable.c:125
 __kernel_text_address+0xd/0x40 kernel/extable.c:79
 unwind_get_return_address+0x5d/0xc0 arch/x86/kernel/unwind_orc.c:369
 arch_stack_walk+0x125/0x1b0 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240
 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2235 [inline]
 slab_free mm/slub.c:4464 [inline]
 kmem_cache_free+0x145/0x350 mm/slub.c:4539
 user_path_at+0x44/0x60 fs/namei.c:3004
 do_utimes_path fs/utimes.c:95 [inline]
 do_utimes+0x112/0x270 fs/utimes.c:145
 __do_sys_utimensat fs/utimes.c:164 [inline]
 __se_sys_utimensat fs/utimes.c:148 [inline]
 __x64_sys_utimensat+0x14f/0x250 fs/utimes.c:148
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1b5ed19fcc
RSP: 002b:00007ffd4c814c48 EFLAGS: 00000202 ORIG_RAX: 0000000000000118
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1b5ed19fcc
RDX: 0000000000000000 RSI: 00005609aba0ef70 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000000000000000 R09: 00005609aba25c80
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000006180
R13: 0000000000000030 R14: 00005609aba0ef70 R15: 00005609aba515a0
 </TASK>
rcu: rcu_preempt kthread starved for 10457 jiffies! g81089 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:25584 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/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 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111