Skip to content

Fix memory leak on error return of collation callback in pdo_sqlite #18332

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
wants to merge 1 commit into from
+1 −1
Closed

Fix memory leak on error return of collation callback in pdo_sqlite #18332

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion ext/pdo_sqlite/pdo_sqlite.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -352,14 +352,14 @@ static int php_sqlite_collation_callback(void *context, int string1_len, const v
zend_type_error("%s(): Return value of the callback must be of type int, %s returned",
ZSTR_VAL(func_name), zend_zval_value_name(&retval));
zend_string_release(func_name);
zval_ptr_dtor(&retval);
return FAILURE;
}
if (Z_LVAL(retval) > 0) {
ret = 1;
} else if (Z_LVAL(retval) < 0) {
ret = -1;
}
zval_ptr_dtor(&retval);
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Wouldn’t it leak if it’s not a LONG?

Copy link
Member Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

This code path is only taken if it is a LONG. If it's not a long, the above code path is taken with the return FAILURE;. We therefore have to dtor the zval in the above path.

Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Oh, my bad. I meant the case when it’s LONG — that was a typo.

Copy link
Member Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

a LONG is not refcounted, so zval_ptr_dtor is a no-op on that.

Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I didn’t know much about that, thanks!

}

zval_ptr_dtor(&zargs[0]);
Expand Down
Loading