From 91b02c7186b4bef27ee153afdcf672f4412e6a96 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ren=C3=A9=20Canna=C3=B2?= <rene.cannao@gmail.com>
Date: Sat, 16 Feb 2019 22:41:13 +1100
Subject: [PATCH] Fix crash if login without password #1893

---
 lib/MySQL_Protocol.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/MySQL_Protocol.cpp b/lib/MySQL_Protocol.cpp
index 80e4e478b..76f337a42 100644
--- a/lib/MySQL_Protocol.cpp
+++ b/lib/MySQL_Protocol.cpp
@@ -1507,8 +1507,10 @@ bool MySQL_Protocol::process_pkt_handshake_response(unsigned char *pkt, unsigned
 	} else {
 		db = NULL;
 	}
-	if (pass[pass_len-1] == 0) {
-		pass_len--; // remove the extra 0 if present
+	if (pass_len) {
+		if (pass[pass_len-1] == 0) {
+			pass_len--; // remove the extra 0 if present
+		}
 	}
 	if (_ptr+len > pkt) {
 		if (capabilities & CLIENT_PLUGIN_AUTH) {