lib/validate: fixed memory bug

this code used memory pool of source packet instead
of the answer, this could result in invalidated
memory read if the memory occupied by source
packet was rewritten

diff --git a/lib/layer/validate.c b/lib/layer/validate.c
index e7364ef9034758e108276ff71f2ff029287da7dd..bf5bafaf30c55d97d7bd1a8ea3d1995a58efd7d1 100644 (file)
--- a/lib/layer/validate.c
+++ b/lib/layer/validate.c
@@ -484,7 +484,7 @@ static int validate(knot_layer_t *ctx, knot_pkt_t *pkt)
                const knot_pktsection_t *auth = knot_pkt_section(pkt, KNOT_AUTHORITY);
                for (unsigned i = 0; i < auth->count; ++i) {
                        const knot_rrset_t *rr = knot_pkt_rr(auth, i);
-                       kr_rrarray_add(&req->authority, rr, &pkt->mm);
+                       kr_rrarray_add(&req->authority, rr, &req->answer->mm);
                }
        }