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MDEV-23092 SIGABRT when setting invalid wsrep_provider

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Some invalid wsrep_provider paths may be interpreted as a valid
directory. For example '/invalid/libgalera_smm.so' with UTF character
set is interpreted as '/', which is a valid directory. A early check
that wsrep_provider should not be a directory fixes it.
This commit is contained in:
Daniele Sciascia 2020-08-18 10:56:56 +02:00 committed by Jan Lindström
parent 09dd06f14a
commit fe3284b2cc
4 changed files with 49 additions and 0 deletions
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13
mysql-test/suite/wsrep/r/MDEV-23092.result Normal file
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@ -0,0 +1,13 @@
SET COLLATION_CONNECTION='utf16le_bin';
SET GLOBAL wsrep_provider='/invalid/path/libgalera_smm.so';
ERROR 42000: Variable 'wsrep_provider' can't be set to the value of '/'
SET GLOBAL wsrep_cluster_address='OFF';
SET GLOBAL wsrep_slave_threads=10;
SELECT 1;
1
1
SET GLOBAL wsrep_cluster_address='gcomm://';
SET GLOBAL wsrep_slave_threads=DEFAULT;
CALL mtr.add_suppression("wsrep_load()");
CALL mtr.add_suppression("Failed to create a new provider");
CALL mtr.add_suppression("Failed to load provider");

8
mysql-test/suite/wsrep/t/MDEV-23092.cnf Normal file
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@ -0,0 +1,8 @@
!include ../my.cnf
[mysqld.1]
wsrep-on=OFF
binlog-format=ROW
wsrep-provider=none
wsrep-cluster-address='gcomm://'
innodb_autoinc_lock_mode=2

22
mysql-test/suite/wsrep/t/MDEV-23092.test Normal file
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@ -0,0 +1,22 @@
#
# MDEV-23092: SIGABRT in wsrep::server_state::provider when setting
# invalid wsrep_provider (on optimized builds)
#
--source include/have_innodb.inc
--source include/have_wsrep.inc
--source include/have_binlog_format_row.inc
SET COLLATION_CONNECTION='utf16le_bin';
--error 1231
SET GLOBAL wsrep_provider='/invalid/path/libgalera_smm.so';
SET GLOBAL wsrep_cluster_address='OFF';
SET GLOBAL wsrep_slave_threads=10;
SELECT 1;
SET GLOBAL wsrep_cluster_address='gcomm://';
SET GLOBAL wsrep_slave_threads=DEFAULT;
CALL mtr.add_suppression("wsrep_load()");
CALL mtr.add_suppression("Failed to create a new provider");
CALL mtr.add_suppression("Failed to load provider");

6
sql/wsrep_var.cc
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@ -320,6 +320,12 @@ static int wsrep_provider_verify (const char* provider_str)
{ {
return 1; return 1;
} }
if (MY_S_ISDIR(f_stat.st_mode))
{
return 1;
}
return 0; return 0;
} }