check n before cbs_init, coverity - ID 125063

ok bcook@ miod@

1 files changed, 9 insertions, 3 deletions

diff --git a/src/lib/libssl/s3_clnt.c b/src/lib/libssl/s3_clnt.c
index 3f7f3a411d..ee964407ee 100644
--- a/src/lib/libssl/s3_clnt.c
+++ b/src/lib/libssl/s3_clnt.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: s3_clnt.c,v 1.118 2015/07/15 21:52:02 beck Exp $ */
+/* $OpenBSD: s3_clnt.c,v 1.119 2015/07/15 22:22:54 beck Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -1736,9 +1736,15 @@ ssl3_get_new_session_ticket(SSL *s)
                 goto f_err;
         }
 
-        CBS_init(&cbs, s->init_msg, n);
+        if (n < 0) {
+                al = SSL_AD_DECODE_ERROR;
+                SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,
+                    SSL_R_LENGTH_MISMATCH);
+                goto f_err;
+        }
 
-        if (n < 0 || !CBS_get_u32(&cbs, &lifetime_hint) ||
+        CBS_init(&cbs, s->init_msg, n);
+        if (!CBS_get_u32(&cbs, &lifetime_hint) ||
 #if UINT32_MAX > LONG_MAX
             lifetime_hint > LONG_MAX ||
 #endif