From: Rich Salz <rsalz@openssl.org>
Date: Tue, 11 Apr 2017 15:59:59 +0000 (-0400)
Subject: Additional check to handle BAD SSL_write retry
X-Git-Tag: OpenSSL_1_1_1-pre1~1815
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=cbbe9186f3d625f98aecb3f4dd4aaf457066b25c;p=oweals%2Fopenssl.git

Additional check to handle BAD SSL_write retry

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3124)
---

diff --git a/ssl/record/rec_layer_s3.c b/ssl/record/rec_layer_s3.c
index 562b9e454b..14c6778ae6 100644
--- a/ssl/record/rec_layer_s3.c
+++ b/ssl/record/rec_layer_s3.c
@@ -356,7 +356,8 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, size_t len,
      * promptly send beyond the end of the users buffer ... so we trap and
      * report the error in a way the user will notice
      */
-    if (len < s->rlayer.wnum) {
+    if ((len < s->rlayer.wnum) 
+        || ((wb->left != 0) && (len < (s->rlayer.wnum + s->rlayer.wpend_tot)))) {
         SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_BAD_LENGTH);
         return -1;
     }