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mdnsresponder: Fix nullpointer dereference while parsing interface list

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This patch was backported from https://github.com/IETF-Hackathon/mDNSResponder/commit/1fb07b9524b4afed3a826c087db4dc48a7bfdb8

(cherry picked from commit a4b33ab169a3ca60cd12c2eb5155e899779d3570)
Signed-off-by: Maarten Aertsen <spam-github@rtsn.nl>
This commit is contained in:
Maarten Aertsen 2022-02-25 21:46:53 +01:00 committed by Josef Schlehofer
parent 17a7ed325c
commit 3e75dc582e
2 changed files with 19 additions and 1 deletions
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2
net/mdnsresponder/Makefile
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@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
PKG_NAME:=mDNSResponder
PKG_VERSION:=IETF104
PKG_RELEASE:=4
PKG_RELEASE:=5
PKG_SOURCE:=mDNSResponder-$(PKG_VERSION).tar.gz
PKG_SOURCE_URL:=https://opensource.apple.com/tarballs/mDNSResponder/IETF/

18
net/mdnsresponder/patches/020-fix-core-dump-while-parsing-interface-list.patch Normal file
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@ -0,0 +1,18 @@
From 1fb07b9524b4afed3a826c087db4dc48a7bfdb89 Mon Sep 17 00:00:00 2001
From: Ted Lemon <elemon@apple.com>
Date: Thu, 6 Jun 2019 13:35:43 -0400
Subject: [PATCH] Fix core dump while parsing interface list on Posix
---
--- a/mDNSPosix/mDNSPosix.c
+++ b/mDNSPosix/mDNSPosix.c
@@ -1320,7 +1320,8 @@ mDNSlocal int SetupInterfaceList(mDNS *c
struct ifaddrs *i = intfList;
while (i)
{
- if ( ((i->ifa_addr->sa_family == AF_INET)
+ if ( i->ifa_addr != NULL &&
+ ((i->ifa_addr->sa_family == AF_INET)
#if HAVE_IPV6
|| (i->ifa_addr->sa_family == AF_INET6)
#endif