Bug #50597 [Opn->Dup]: odbc_result for a long varchar with defaultlrl=4k returns uninitialized memory

Edit report at https://bugs.php.net/bug.php?id=50597&edit=1 ID: 50597 Updated by: cmb@php.net Reported by: cdf123 at cdf123 dot net Summary: odbc_result for a long varchar with defaultlrl=4k returns uninitialized memory -Status: Open +Status: Duplicate Type: Bug Package: ODBC related Operating System: Gentoo Linux PHP Version: 5.3.1 -Assigned To: +Assigned To: cmb Block user comment: N Private report: N New Comment: I'm closing this as duplicate of bug #80147, which has recently been fixed. Previous Comments: ------------------------------------------------------------------------ [2009-12-28 20:59:25] cdf123 at cdf123 dot net Description: ------------ odbc_result looks like it is initializing the result string to the length of the data in the field, but the defaultlrl is limits how much is returned, so the remaining bytes seem to be random uninitialized memory. Reproduce code: --------------- <?php $data = '000'; for($x=1;$x<12;$x++) $data .= $data; $db = odbc_connect('DSN', 'user', 'pass'); odbc_exec($db, 'CREATE TABLE Temp (id int, seq int, contents varchar(8000))'); odbc_exec($db, 'INSERT INTO Temp (id, seq, contents) VALUES (1, 1, \'' . $data . '\')'); $rst = odbc_exec($db, 'select * from Temp'); while(odbc_fetch_row($rst)) echo odbc_result($rst, 'contents'); odbc_free_result($rst); ?> Expected result: ---------------- 4096 '0's Actual result: -------------- 4096 '0's and 2048 bytes of binary data ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=50597&edit=1