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Bug#33275 Server crash when creating temporary table mysql.user

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When creating a temporary table that uses the same name as the mysql
privs table the server would crash on FLUSH PRIVILEGES.

This patches corrects the problem by setting a flag to ignore any
temporary table when trying to reload the privileges.
This commit is contained in:
thek@adventure.(none) 2008-03-25 12:52:55 +01:00
parent 777a143833
commit eb5cdca66f
3 changed files with 17 additions and 1 deletions
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6
mysql-test/r/grant.result
View File

@ -1129,4 +1129,10 @@ DROP USER mysqltest_1@localhost;
DROP DATABASE db27878;
use test;
DROP TABLE t1;
#
# Bug#33275 Server crash when creating temporary table mysql.user
#
CREATE TEMPORARY TABLE mysql.user (id INT);
FLUSH PRIVILEGES;
DROP TABLE mysql.user;
End of 5.0 tests

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

@ -1153,4 +1153,11 @@ DROP DATABASE db27878;
use test;
DROP TABLE t1;
--echo #
--echo # Bug#33275 Server crash when creating temporary table mysql.user
--echo #
CREATE TEMPORARY TABLE mysql.user (id INT);
FLUSH PRIVILEGES;
DROP TABLE mysql.user;
--echo End of 5.0 tests

5
sql/sql_acl.cc
View File

@ -558,6 +558,8 @@ my_bool acl_reload(THD *thd)
tables[0].next_local= tables[0].next_global= tables+1;
tables[1].next_local= tables[1].next_global= tables+2;
tables[0].lock_type=tables[1].lock_type=tables[2].lock_type=TL_READ;
tables[0].skip_temporary= tables[1].skip_temporary=
tables[2].skip_temporary= TRUE;
if (simple_open_n_lock_tables(thd, tables))
{
@ -3528,7 +3530,8 @@ my_bool grant_reload(THD *thd)
tables[0].next_local= tables[0].next_global= tables+1;
tables[1].next_local= tables[1].next_global= tables+2;
tables[0].lock_type= tables[1].lock_type= tables[2].lock_type= TL_READ;
tables[0].skip_temporary= tables[1].skip_temporary=
tables[2].skip_temporary= TRUE;
/*
To avoid deadlocks we should obtain table locks before
obtaining LOCK_grant rwlock.