rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P4082
	(detected by 1, t=10503 jiffies, g=11637, q=25455 ncpus=2)
task:syz-executor.1  state:R  running task     stack:27160 pid:4082  ppid:1      flags:0x00004006
Call Trace:
 <IRQ>
 sched_show_task kernel/sched/core.c:8897 [inline]
 sched_show_task+0x450/0x5c0 kernel/sched/core.c:8871
 rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:255 [inline]
 print_other_cpu_stall kernel/rcu/tree_stall.h:599 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:761 [inline]
 rcu_pending kernel/rcu/tree.c:3825 [inline]
 rcu_sched_clock_irq+0x21d1/0x2470 kernel/rcu/tree.c:2347
 update_process_times+0x11e/0x1a0 kernel/time/timer.c:1839
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:243
 tick_sched_timer+0xf2/0x120 kernel/time/tick-sched.c:1480
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x1c6/0xfb0 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x320/0x790 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline]
 __sysvec_apic_timer_interrupt+0x180/0x640 arch/x86/kernel/apic/apic.c:1113
 sysvec_apic_timer_interrupt+0x92/0xc0 arch/x86/kernel/apic/apic.c:1107
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:write_comp_data+0x3c/0x90 kernel/kcov.c:236
Code: 01 00 00 49 89 f8 65 48 8b 14 25 c0 7f 02 00 a9 00 01 ff 00 74 0e 85 f6 74 59 8b 82 8c 15 00 00 85 c0 74 4f 8b 82 68 15 00 00 <83> f8 03 75 44 48 8b 82 70 15 00 00 8b 92 6c 15 00 00 48 8b 38 48
RSP: 0018:ffffc900037cfaf0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff920006f9f5f RCX: ffffffff89a41e25
RDX: ffff88803813e0c0 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000092080 R12: ffff88807ce0b000
R13: ffffc900037cfc50 R14: ffffffffffffffff R15: ffffc900037cfb18
 rcu_read_unlock include/linux/rcupdate.h:767 [inline]
 xa_find+0x175/0x330 lib/xarray.c:2026
 devlinks_xa_find_get.constprop.0+0x93/0x260 net/core/devlink.c:300
 devlinks_xa_find_get_first net/core/devlink.c:328 [inline]
 devlink_pernet_pre_exit+0x8a/0x1d0 net/core/devlink.c:12507
 ops_pre_exit_list net/core/net_namespace.c:159 [inline]
 setup_net+0x749/0xc50 net/core/net_namespace.c:349
 copy_net_ns+0x31c/0x760 net/core/net_namespace.c:478
 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0xc5/0x1f0 kernel/nsproxy.c:226
 ksys_unshare+0x449/0x920 kernel/fork.c:3188
 __do_sys_unshare kernel/fork.c:3259 [inline]
 __se_sys_unshare kernel/fork.c:3257 [inline]
 __x64_sys_unshare+0x31/0x40 kernel/fork.c:3257
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc71ec8d697
Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff472ed9a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007fff472edfe8 RCX: 00007fc71ec8d697
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000003
R13: 00007fff472eda80 R14: 00007fc71edac9d8 R15: 000000000000000c
 </TASK>