From ffe33dd788af80a6645ab62b1df8e8f215b8902a Mon Sep 17 00:00:00 2001
From: Phil Sutter <psutter@redhat.com>
Date: Thu, 25 Oct 2018 12:24:30 +0200
Subject: [PATCH] ip-route: Fix parse_encap_seg6() srh parsing

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1602555
Upstream Status: iproute2.git commit 3b5c5ef0a75a9

commit 3b5c5ef0a75a9f685e78cd25da78706b5077bd83
Author: Phil Sutter <phil@nwl.cc>
Date:   Thu Oct 18 15:44:14 2018 +0200

    ip-route: Fix parse_encap_seg6() srh parsing

    In case caller did not specify 'segs' parameter, parse_srh() would read
    garbage while iterating over 'segbuf'. Avoid this by initializing
    'segbuf' to an empty string.

    Fixes: e8493916a8ede ("iproute: add support for SR-IPv6 lwtunnel encapsulation")
    Signed-off-by: Phil Sutter <phil@nwl.cc>
    Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 ip/iproute_lwtunnel.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ip/iproute_lwtunnel.c b/ip/iproute_lwtunnel.c
index 85045d4..4ebfaa7 100644
--- a/ip/iproute_lwtunnel.c
+++ b/ip/iproute_lwtunnel.c
@@ -494,7 +494,7 @@ static int parse_encap_seg6(struct rtattr *rta, size_t len, int *argcp,
 	struct seg6_iptunnel_encap *tuninfo;
 	struct ipv6_sr_hdr *srh;
 	char **argv = *argvp;
-	char segbuf[1024];
+	char segbuf[1024] = "";
 	int argc = *argcp;
 	int encap = -1;
 	__u32 hmac = 0;
-- 
1.8.3.1