From a52c46e06935b09ff9219ae7684b5a29394e992b Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Mon, 30 Apr 2018 13:50:59 +0200 Subject: [PATCH] Bug#25471090: MYSQL USE AFTER FREE a better fix --- sql-common/client.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sql-common/client.c b/sql-common/client.c index 9cb3311d2e1..b485ebf4f60 100644 --- a/sql-common/client.c +++ b/sql-common/client.c @@ -1636,7 +1636,7 @@ MYSQL_DATA *cli_read_rows(MYSQL *mysql,MYSQL_FIELD *mysql_fields, else { cur->data[field] = to; - if (to + len > end_to) + if (unlikely(len > (ulong)(end_to-to) || to > end_to)) { free_rows(result); set_mysql_error(mysql, CR_MALFORMED_PACKET, unknown_sqlstate); @@ -1708,7 +1708,7 @@ read_one_row(MYSQL *mysql,uint fields,MYSQL_ROW row, ulong *lengths) } else { - if (pos + len > end_pos) + if (unlikely(len > (ulong)(end_pos - pos) || pos > end_pos)) { set_mysql_error(mysql, CR_UNKNOWN_ERROR, unknown_sqlstate); return -1;