From ff4905b2a22bbda5550cfea7cb16e258642ab30e Mon Sep 17 00:00:00 2001
From: Ainar Garipov <a.garipov@adguard.com>
Date: Tue, 13 Jul 2021 14:07:45 +0300
Subject: [PATCH] Pull request: aghnet: fix impap iteration

Updates #3346.

Squashed commit of the following:

commit d244cd1cc43a8c8e25b51d1117fa6fca1f4dcb18
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Mon Jul 12 21:52:39 2021 +0300

    aghnet: fix impap iteration
---
 internal/aghnet/ipmap.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/internal/aghnet/ipmap.go b/internal/aghnet/ipmap.go
index 78b3025d..281e27ee 100644
--- a/internal/aghnet/ipmap.go
+++ b/internal/aghnet/ipmap.go
@@ -74,6 +74,11 @@ func (m *IPMap) Range(f func(ip net.IP, v interface{}) (cont bool)) {
 	}
 
 	for k, v := range m.m {
+		// Array slicing produces a pointer, so copy the array here.
+		//
+		// See https://github.com/AdguardTeam/AdGuardHome/issues/3346
+		// as well as https://github.com/kyoh86/looppointer/issues/9.
+		k := k
 		if !f(net.IP(k[:]), v) {
 			break
 		}