From 107c894a540d147338ab4e737eb9ef76e49c3493 Mon Sep 17 00:00:00 2001 From: Georgi Kodinov Date: Thu, 28 Jun 2012 18:38:55 +0300 Subject: Bug #13708485: malformed resultset packet crashes client Several fixes : * sql-common/client.c Added a validity check of the fields metadata packet sent by the server. Now libmysql will check if the length of the data sent by the server matches what's expected by the protocol before using the data. * client/mysqltest.cc Fixed the error handling code in mysqltest to avoid sending new commands when the reading the result set failed (and there are unread data in the pipe). * sql_common.h + libmysql/libmysql.c + sql-common/client.c unpack_fields() now generates a proper error when it fails. Added a new argument to this function to support the error generation. * sql/protocol.cc Added a debug trigger to cause the server to send a NULL insted of the packet expected by the client for testing purposes. --- libmysql/libmysql.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'libmysql/libmysql.c') diff --git a/libmysql/libmysql.c b/libmysql/libmysql.c index 562da594fea..5d153317150 100644 --- a/libmysql/libmysql.c +++ b/libmysql/libmysql.c @@ -1,4 +1,4 @@ -/* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. +/* Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -1254,7 +1254,7 @@ MYSQL_FIELD *cli_list_fields(MYSQL *mysql) return NULL; mysql->field_count= (uint) query->rows; - return unpack_fields(query,&mysql->field_alloc, + return unpack_fields(mysql, query,&mysql->field_alloc, mysql->field_count, 1, mysql->server_capabilities); } @@ -1314,7 +1314,7 @@ mysql_list_processes(MYSQL *mysql) if (!(fields = (*mysql->methods->read_rows)(mysql,(MYSQL_FIELD*) 0, protocol_41(mysql) ? 7 : 5))) DBUG_RETURN(NULL); - if (!(mysql->fields=unpack_fields(fields,&mysql->field_alloc,field_count,0, + if (!(mysql->fields=unpack_fields(mysql, fields,&mysql->field_alloc,field_count,0, mysql->server_capabilities))) DBUG_RETURN(0); mysql->status=MYSQL_STATUS_GET_RESULT; @@ -1891,7 +1891,7 @@ my_bool cli_read_prepare_result(MYSQL *mysql, MYSQL_STMT *stmt) if (!(fields_data= (*mysql->methods->read_rows)(mysql,(MYSQL_FIELD*)0,7))) DBUG_RETURN(1); - if (!(stmt->fields= unpack_fields(fields_data,&stmt->mem_root, + if (!(stmt->fields= unpack_fields(mysql, fields_data,&stmt->mem_root, field_count,0, mysql->server_capabilities))) DBUG_RETURN(1); -- cgit v1.2.1