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BUG#34788 - malformed federated connection url is not handled

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correctly - crashes server !

Creating federated table with connect string containing empty
(zero-length) host name and port is evaluated as 0 (port is
incorrect, omitted or 0) crashes server.

This happens because federated calls strcmp() with NULL pointer.

Fixed by avoiding strcmp() call if hostname is set to NULL.


mysql-test/r/federated.result:
  A test case for BUG#34788.
mysql-test/t/federated.test:
  A test case for BUG#34788.
sql/ha_federated.cc:
  Fixed that parse_url() may call strcmp() with NULL pointer.
This commit is contained in:
unknown 2008-03-20 19:07:17 +04:00
parent 7343db297a
commit 8030bdfc16
3 changed files with 17 additions and 1 deletions
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2
mysql-test/r/federated.result
View File

@ -2069,6 +2069,8 @@ a b
1 1
DROP TABLE t1;
DROP TABLE t1;
CREATE TABLE t1 (a INT) ENGINE=federated CONNECTION='mysql://@:://';
DROP TABLE t1;
DROP TABLE IF EXISTS federated.t1;
DROP DATABASE IF EXISTS federated;
DROP TABLE IF EXISTS federated.t1;

7
mysql-test/t/federated.test
View File

@ -1738,4 +1738,11 @@ DROP TABLE t1;
connection slave;
DROP TABLE t1;
#
# BUG#34788 - malformed federated connection url is not handled correctly -
# crashes server !
#
CREATE TABLE t1 (a INT) ENGINE=federated CONNECTION='mysql://@:://';
DROP TABLE t1;
source include/federated_cleanup.inc;

9
sql/ha_federated.cc
View File

@ -643,12 +643,19 @@ static int parse_url(FEDERATED_SHARE *share, TABLE *table,
if ((strchr(share->table_name, '/')))
goto error;
/*
If hostname is omitted, we set it to NULL. According to
mysql_real_connect() manual:
The value of host may be either a hostname or an IP address.
If host is NULL or the string "localhost", a connection to the
local host is assumed.
*/
if (share->hostname[0] == '\0')
share->hostname= NULL;
if (!share->port)
{
if (strcmp(share->hostname, my_localhost) == 0)
if (!share->hostname || strcmp(share->hostname, my_localhost) == 0)
share->socket= my_strdup(MYSQL_UNIX_ADDR, MYF(0));
else
share->port= MYSQL_PORT;