From: Ondrej Zajicek <santiago@crfreenet.org>
Date: Tue, 14 Mar 2023 15:02:32 +0000 (+0100)
Subject: Use RTA_MAX_SIZE in rta_do_cow()
X-Git-Tag: v2.15~32
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=63f1c4d918209ba4210024638011f7b9ccdd894b;p=thirdparty%2Fbird.git

Use RTA_MAX_SIZE in rta_do_cow()

This allows to modify MPLS label stack in filters. Fixes a bug in
handling of 'gw_mpls' attribute.
---

diff --git a/nest/rt-attr.c b/nest/rt-attr.c
index 7beb119b7..25936d81d 100644
--- a/nest/rt-attr.c
+++ b/nest/rt-attr.c
@@ -1264,7 +1264,7 @@ rta__free(rta *a)
 rta *
 rta_do_cow(rta *o, linpool *lp)
 {
-  rta *r = lp_alloc(lp, rta_size(o));
+  rta *r = lp_alloc(lp, RTA_MAX_SIZE);
   memcpy(r, o, rta_size(o));
   for (struct nexthop **nhn = &(r->nh.next), *nho = o->nh.next; nho; nho = nho->next)
     {