1 files changed, 3 insertions, 1 deletions

diff --git a/src/lib/libssl/tls13_legacy.c b/src/lib/libssl/tls13_legacy.c
index 943e2db9a1..a9a7fff3e0 100644
--- a/src/lib/libssl/tls13_legacy.c
+++ b/src/lib/libssl/tls13_legacy.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: tls13_legacy.c,v 1.16 2020/10/11 02:22:27 jsing Exp $ */
+/*      $OpenBSD: tls13_legacy.c,v 1.17 2020/10/11 02:59:47 jsing Exp $ */
 /*
  * Copyright (c) 2018, 2019 Joel Sing <jsing@openbsd.org>
  *
@@ -340,6 +340,8 @@ tls13_use_legacy_stack(struct tls13_ctx *ctx)
 
         /* Stash the current handshake message. */
         tls13_handshake_msg_data(ctx->hs_msg, &cbs);
+        if (!BUF_MEM_grow_clean(s->internal->init_buf, CBS_len(&cbs)))
+                goto err;
         if (!CBS_write_bytes(&cbs, s->internal->init_buf->data,
             s->internal->init_buf->length, NULL))
                 goto err;