From 38e0f4a5d6a0a4716c875ad84e499538596e4aa9 Mon Sep 17 00:00:00 2001
From: Azat Khuzhin <a3at.mail@gmail.com>
Date: Mon, 2 May 2016 15:21:50 +0300
Subject: [PATCH] be_openssl: clear all pending errors before SSL_*() calls

Refs: #350
Reported-by: @CapSel
---
 bufferevent_openssl.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/bufferevent_openssl.c b/bufferevent_openssl.c
index 37478b6a..017bfce6 100644
--- a/bufferevent_openssl.c
+++ b/bufferevent_openssl.c
@@ -593,6 +593,7 @@ do_read(struct bufferevent_openssl *bev_ssl, int n_to_read) {
 	for (i=0; i<n; ++i) {
 		if (bev_ssl->bev.read_suspended)
 			break;
+		ERR_clear_error();
 		r = SSL_read(bev_ssl->ssl, space[i].iov_base, space[i].iov_len);
 		if (r>0) {
 			result |= OP_MADE_PROGRESS;
@@ -669,6 +670,7 @@ do_write(struct bufferevent_openssl *bev_ssl, int atmost)
 		if (space[i].iov_len == 0)
 			continue;
 
+		ERR_clear_error();
 		r = SSL_write(bev_ssl->ssl, space[i].iov_base,
 		    space[i].iov_len);
 		if (r > 0) {
@@ -1021,6 +1023,7 @@ do_handshake(struct bufferevent_openssl *bev_ssl)
 		return -1;
 	case BUFFEREVENT_SSL_CONNECTING:
 	case BUFFEREVENT_SSL_ACCEPTING:
+		ERR_clear_error();
 		r = SSL_do_handshake(bev_ssl->ssl);
 		break;
 	}