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>

diff --git a/ip/iproute_lwtunnel.c b/ip/iproute_lwtunnel.c
index 85045d4fff74207d3db5e2d5c4699fbda622a5b0..4ebfaa7cd6826f0dcb7c2fc9f9805299b5068631 100644 (file)
--- 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;