From: Florin Coras <fcoras@cisco.com>
Date: Wed, 10 May 2017 19:32:53 +0000 (-0700)
Subject: Validate ip6 interface fib tables early on
X-Git-Tag: v17.04.1~5
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=99c0734e54f16456aed0c35b464d6d165e26d9b1;p=vpp.git

Validate ip6 interface fib tables early on

This should avoid random crashes due to reception of packets (multicast
in particular) before ip6 addresses are configured on the interfaces.

Change-Id: Ibcf1a5a2ae2fa75f8b57da1b2f09f32c081210d7
Signed-off-by: Florin Coras <fcoras@cisco.com>
---

diff --git a/src/vnet/ip/ip6_forward.c b/src/vnet/ip/ip6_forward.c
index 0b8691bf3dd..15970da5b36 100644
--- a/src/vnet/ip/ip6_forward.c
+++ b/src/vnet/ip/ip6_forward.c
@@ -659,6 +659,11 @@ VNET_FEATURE_INIT (ip6_interface_output, static) = {
 clib_error_t *
 ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
 {
+  ip6_main_t *im = &ip6_main;
+
+  vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
+  vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
+
   vnet_feature_enable_disable ("ip6-unicast", "ip6-drop", sw_if_index,
 			       is_add, 0, 0);