From 0ed57bad674b47392099c8f3fa965a3c7af66225 Mon Sep 17 00:00:00 2001
From: Bryan Boreham <bjboreham@gmail.com>
Date: Thu, 18 Sep 2014 11:56:15 +0100
Subject: [PATCH] rm tempfile before we use it, to avoid attack via symlink

---
 weaver/weave | 1 +
 1 file changed, 1 insertion(+)

diff --git a/weaver/weave b/weaver/weave
index 0d4e1fb3..1c52da6c 100755
--- a/weaver/weave
+++ b/weaver/weave
@@ -121,6 +121,7 @@ configure_container_networking() {
     LOCAL_IFNAME="v${CONTAINER_IFNAME}pl${NSPID}"
     GUEST_IFNAME="v${CONTAINER_IFNAME}pg${NSPID}"
     IP_TMPFILE=/tmp/weave_ip_output_$$
+    rm -f $IP_TMPFILE
     if ip link add name $LOCAL_IFNAME mtu $MTU type veth peer name $GUEST_IFNAME mtu $MTU >$IP_TMPFILE 2>&1 ; then
         if  (ip link set $LOCAL_IFNAME master $BRIDGE &&
             ip link set $LOCAL_IFNAME up &&