Type:
Priority:
Resolution:
Fixed
Affects Version/s:
10.0(EOL) , 10.1(EOL) , 10.2(EOL) , 10.3(EOL) , 10.4(EOL) , 10.5
With a complex MATCH...AGAINST string, the call stack inside the server could look like this:
10.1
fts_ast_visit_sub_exp
fts_query_visitor
fts_ast_visit
fts_ast_visit
...
fts_ast_visit_sub_exp
fts_query_visitor
fts_ast_visit
fts_ast_visit
fts_ast_visit_sub_exp
fts_query_visitor
fts_ast_visit
fts_query
ha_innobase::ft_init_ext
Item_func_match::init_search
init_ftfuncs
JOIN::optimize_inner
JOIN::optimize
mysql_select
On my platform (GCC 10.2.0 -Og AMD64 debug build), the stack usage is 464 bytes for each fts_ast_visit_sub_exp() , and further 9,248 bytes from Item_func_match::init_search() to the first fts_ast_visit_sub_exp() .
To prevent stack overflow, we should return an error if too deep recursion is encountered.
There are no comments yet on this issue.
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Bug
Major
MDEV-24004 2020 Q4 release merge