rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P10370/2:b..l
	(detected by 0, t=10503 jiffies, g=114481, q=26881 ncpus=2)
task:syz-executor.1  state:R  running task     stack:24872 pid:10370 ppid:1      flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5296 [inline]
 __schedule+0x1409/0x43f0 kernel/sched/core.c:6609
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6921
 irqentry_exit+0x57/0x80 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:rcu_lock_acquire+0x32/0x40 include/linux/rcupdate.h:326
Code: fa e8 92 73 e8 f6 48 c7 c7 80 57 f2 8c 31 f6 31 d2 b9 02 00 00 00 45 31 c0 45 31 c9 68 25 60 a3 8a e8 22 a8 c7 f6 48 83 c4 08 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 e8 5b 73 e8 f6 f3 0f 1e
RSP: 0018:ffffc900032ef978 EFLAGS: 00000286
RAX: 77887c9009440900 RBX: ffffffff8e0aaa00 RCX: 1ffff9200065deac
RDX: dffffc0000000000 RSI: ffffffff8aea80c0 RDI: ffffffff8b382400
RBP: ffffc900032efa90 R08: dffffc0000000000 R09: fffffbfff2038631
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900032ef9e0
R13: dffffc0000000000 R14: ffffc900032ef9f8 R15: 0000000000000000
 rcu_read_lock include/linux/rcupdate.h:764 [inline]
 xa_get_mark+0x14e/0x590 lib/xarray.c:1945
 devlinks_xa_find_get+0xdb/0x250 net/core/devlink.c:314
 devlinks_xa_find_get_first net/core/devlink.c:334 [inline]
 devlink_pernet_pre_exit+0xda/0x2c0 net/core/devlink.c:12997
 ops_pre_exit_list net/core/net_namespace.c:159 [inline]
 setup_net+0x776/0xb90 net/core/net_namespace.c:355
 copy_net_ns+0x4c6/0x790 net/core/net_namespace.c:490
 create_new_namespaces+0x425/0x7a0 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x11d/0x170 kernel/nsproxy.c:228
 ksys_unshare+0x584/0xb20 kernel/fork.c:3202
 __do_sys_unshare kernel/fork.c:3273 [inline]
 __se_sys_unshare kernel/fork.c:3271 [inline]
 __x64_sys_unshare+0x38/0x40 kernel/fork.c:3271
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f0e1b68d6b7
RSP: 002b:00007ffcf740ce88 EFLAGS: 00000202 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007ffcf740d4c8 RCX: 00007f0e1b68d6b7
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000003
R13: 00007ffcf740cf60 R14: 00007f0e1b7ac9d8 R15: 000000000000000c
 </TASK>