Avoid sending alerts after shutdown

Fixes openssl#11388 Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from openssl#15159)
ituglib · May 6, 2021 · 22d1138 · 22d1138
1 parent 021521a
commit 22d1138
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/ssl/s3_msg.c b/ssl/s3_msg.c
@@ -52,6 +52,8 @@ int ssl3_send_alert(SSL *s, int level, int desc)
                                           * protocol_version alerts */
     if (desc < 0)
         return -1;
+    if (s->shutdown & SSL_SENT_SHUTDOWN && desc != SSL_AD_CLOSE_NOTIFY)
+        return -1;
     /* If a fatal one, remove from cache */
     if ((level == SSL3_AL_FATAL) && (s->session != NULL))
         SSL_CTX_remove_session(s->session_ctx, s->session);