From fa2fa02613347204e0e1aa2e588f5e4a4d19d108 Mon Sep 17 00:00:00 2001
From: Siarzhuk Zharski <zharik@gmx.li>
Date: Sun, 19 Aug 2012 22:28:25 +0200
Subject: [PATCH] Insert Addressing::LeaveGroup call on dropping multicast
 group membership. Omitting this call left invalid reference to deleted group
 in the multicast groups hash-map and any upcoming attempt to join the group
 will crash the system. Fixes #6736.

---
 src/add-ons/kernel/network/protocols/ipv4/multicast.cpp | 1 +
 src/add-ons/kernel/network/protocols/ipv6/multicast.cpp | 1 +
 2 files changed, 2 insertions(+)

diff --git a/src/add-ons/kernel/network/protocols/ipv4/multicast.cpp b/src/add-ons/kernel/network/protocols/ipv4/multicast.cpp
index 8da85ec6eb..4cedcd5976 100644
--- a/src/add-ons/kernel/network/protocols/ipv4/multicast.cpp
+++ b/src/add-ons/kernel/network/protocols/ipv4/multicast.cpp
@@ -61,6 +61,7 @@ template<typename Addressing> status_t
 MulticastGroupInterface<Addressing>::Drop()
 {
 	fAddresses.Clear();
+	Addressing::LeaveGroup(this);
 	fFilterMode = kInclude;
 	return B_OK;
 }
diff --git a/src/add-ons/kernel/network/protocols/ipv6/multicast.cpp b/src/add-ons/kernel/network/protocols/ipv6/multicast.cpp
index f21e4beeb4..da4071c7cb 100644
--- a/src/add-ons/kernel/network/protocols/ipv6/multicast.cpp
+++ b/src/add-ons/kernel/network/protocols/ipv6/multicast.cpp
@@ -50,6 +50,7 @@ template<typename Addressing> status_t
 MulticastGroupInterface<Addressing>::Drop()
 {
 	fAddresses.Clear();
+	Addressing::LeaveGroup(this);
 	fFilterMode = kInclude;
 	return B_OK;
 }