From c00524c9cc7fb498c7244350e25823b8352f078c Mon Sep 17 00:00:00 2001

From: Tom Gundersen <teg@jklm.no>

Date: Fri, 19 Sep 2014 23:02:00 +0200

Subject: [PATCH] nspawn: don't try to create veth link with too long ifname

Reported by: James Lott <james@lottspot.com>

---

 src/nspawn/nspawn.c | 2 +-

 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c

index 5af89c9b32..c22d0cb598 100644

--- a/src/nspawn/nspawn.c

+++ b/src/nspawn/nspawn.c

@@ -1657,7 +1657,7 @@ static int setup_veth(pid_t pid, char iface_name[IFNAMSIZ], int *ifi) {

         /* Use two different interface name prefixes depending whether

          * we are in bridge mode or not. */

-        snprintf(iface_name, IFNAMSIZ, "%s-%s",

+        snprintf(iface_name, IFNAMSIZ - 1, "%s-%s",

                  arg_network_bridge ? "vb" : "ve", arg_machine);

         r = generate_mac(&mac_container, CONTAINER_HASH_KEY);