From b8b2b4a03de019e14e439d30ab2d929aec5d6524 Mon Sep 17 00:00:00 2001
From: Lubomir Rintel <lkundrak@v3.sk>
Date: Mon, 1 Jun 2015 21:13:40 +0200
Subject: [PATCH] netlink: check that the origin of the rtnetlink messages is
 kernel

Instead of asserting it's from UID 0, which breaks in network namespaces.
---
 avahi-autoipd/iface-linux.c | 2 +-
 avahi-core/netlink.c        | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/avahi-autoipd/iface-linux.c b/avahi-autoipd/iface-linux.c
index 83e9e41..1888e37 100644
--- a/avahi-autoipd/iface-linux.c
+++ b/avahi-autoipd/iface-linux.c
@@ -215,7 +215,7 @@ static int process_response(int wait_for_done, unsigned seq) {
 
         ucred = (struct ucred*) CMSG_DATA(cmsghdr);
 
-        if (ucred->uid != 0)
+        if (ucred->pid != 0)
             return -1;
 
         bytes = (size_t) r;
diff --git a/avahi-core/netlink.c b/avahi-core/netlink.c
index 4ded5ec..b8c0c06 100644
--- a/avahi-core/netlink.c
+++ b/avahi-core/netlink.c
@@ -82,7 +82,7 @@ int avahi_netlink_work(AvahiNetlink *nl, int block) {
 
     cred = (struct ucred*) CMSG_DATA(cmsg);
 
-    if (cred->uid != 0)
+    if (cred->pid != 0)
         return -1;
 
     p = (struct nlmsghdr *) nl->buffer;
-- 
2.4.3