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Reapply fix for bug#16372 (Server crashes when test 'conc_sys' is running)

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after merge.

Concurrent read and update of privilege structures (like simultaneous
run of SHOW GRANTS and ADD USER) could result in server crash.

Ensure that proper locking of ACL structures is done.

No test case is provided because this bug can't be reproduced
deterministically.
This commit is contained in:
kroki@mysql.com
2006-05-06 11:25:59 +04:00
parent 0acef25de8
commit 3ad0cac41b
3 changed files with 63 additions and 50 deletions
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sql/sql_acl.h
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@@ -196,7 +196,6 @@ bool mysql_table_grant(THD *thd, TABLE_LIST *table, List <LEX_USER> &user_list,
bool mysql_routine_grant(THD *thd, TABLE_LIST *table, bool is_proc,
List <LEX_USER> &user_list, ulong rights,
bool revoke, bool no_error);
ACL_USER *check_acl_user(LEX_USER *user_name, uint *acl_acl_userdx);
my_bool grant_init();
void grant_free(void);
my_bool grant_reload(THD *thd);