rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P15846/1:b..l
	(detected by 0, t=10503 jiffies, g=268125, q=26757 ncpus=2)
task:syz-executor.2  state:R  running task     stack:27016 pid:15846 ppid:1      flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0xb8a/0x5450 kernel/sched/core.c:6555
 preempt_schedule_irq+0x52/0xa0 kernel/sched/core.c:6867
 irqentry_exit+0x35/0x80 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:lock_release+0x429/0x810 kernel/locking/lockdep.c:5676
Code: 7e 83 f8 01 0f 85 02 02 00 00 9c 58 f6 c4 02 0f 85 ed 01 00 00 48 f7 04 24 00 02 00 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c5 48 c7 45 00 00 00 00 00 c7 45 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc9000364fa30 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 66b6c828e87b6578 RCX: ffffc9000364fa80
RDX: 1ffff11004f99555 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff920006c9f48 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000094001 R12: 0000000000000002
R13: 0000000000000003 R14: ffff888027ccaab0 R15: ffff888027cca080
 rcu_lock_release include/linux/rcupdate.h:330 [inline]
 rcu_read_unlock include/linux/rcupdate.h:797 [inline]
 xa_find+0x1a0/0x330 lib/xarray.c:2026
 devlinks_xa_find_get.constprop.0+0x93/0x260 net/core/devlink.c:306
 devlinks_xa_find_get_first net/core/devlink.c:334 [inline]
 devlink_pernet_pre_exit+0x8a/0x1d0 net/core/devlink.c:12997
 ops_pre_exit_list net/core/net_namespace.c:159 [inline]
 setup_net+0x90b/0xe60 net/core/net_namespace.c:350
 copy_net_ns+0x31b/0x6b0 net/core/net_namespace.c:483
 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0xc5/0x1f0 kernel/nsproxy.c:228
 ksys_unshare+0x449/0x920 kernel/fork.c:3202
 __do_sys_unshare kernel/fork.c:3273 [inline]
 __se_sys_unshare kernel/fork.c:3271 [inline]
 __x64_sys_unshare+0x31/0x40 kernel/fork.c:3271
 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: 0033:0x7f594e68d687
RSP: 002b:00007ffc2eee3528 EFLAGS: 00000202 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007ffc2eee3b68 RCX: 00007f594e68d687
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000003
R13: 00007ffc2eee3600 R14: 00007f594e7ac9d8 R15: 000000000000000c
 </TASK>