Bug #52797 [Fbk->NoF]: crash because of double free

Edit report at https://bugs.php.net/bug.php?id=52797&edit=1 ID: 52797 Updated by: php-bugs@lists.php.net Reported by: hossy421 at yahoo dot co dot jp Summary: crash because of double free -Status: Feedback +Status: No Feedback Type: Bug Package: Reproducible crash Operating System: FreeBSD 7.3-RELEASE-p2 PHP Version: 5.3.3 New Comment: No feedback was provided. The bug is being suspended because we assume that you are no longer experiencing the problem. If this is not the case and you are able to provide the information that was requested earlier, please do so and change the status of the bug back to "Open". Thank you. Previous Comments: ------------------------------------------------------------------------ [2012-10-04 11:05:21] slangley at google dot com Happens with 5.3.13 and a custom SAPI. --------------------------------------- Zend/zend_language_scanner.l(709) : Block 0x101e8318 status: Invalid pointer: ((prev=0x00000079) != (prev.size=0x101e827c)) --------------------------------------- --------------------------------------- Zend/zend_language_scanner.l(709) : Block 0x101e8368 status: Beginning: Freed Start: OK End: Overflown (magic=0x0000002D instead of 0xF40CA3AE) At least 4 bytes overflown --------------------------------------- ------------------------------------------------------------------------ [2011-07-25 21:33:37] osharoiko at gmail dot com I can confirm that this reproducable problem stil exists in 5.3.6 and the patch provided in this ticket solves the problem. I have a strong feeling that this problem also exists in trunk (thought I didn't check that directly, but I can see on svn.php.net that patch was not committed). Please consider fixing this problem. ------------------------------------------------------------------------ [2011-01-29 16:07:23] hossy421 at yahoo dot co dot jp The patch is not applied to the latest snapshot. I believe the problem is still there. ------------------------------------------------------------------------ [2011-01-29 11:31:48] felipe@php.net Please try using this snapshot: http://snaps.php.net/php5.3-latest.tar.gz For Windows: http://windows.php.net/snapshots/ ------------------------------------------------------------------------ [2010-09-08 15:18:45] hossy421 at yahoo dot co dot jp Description: ------------ httpd ( Apache 2.2 ) crashes below messages. > pid XXXXX(httpd), uid 80: exited on signal 11 XXXXX is process id of a httpd child process. Test script: --------------- independent of script. httpd is crashed by any script. for example PukiWiki. Expected result: ---------------- all script will run without any error. Actual result: -------------- I've compiled PHP with --enable-debug option. PHP crash with below message. > --------------------------------------- > Zend/zend_language_scanner.l(704) : Block 0x28f9871c status: > Beginning: Freed > Start: OK > End: Overflown (magic=0x0000003C instead of 0xC5F842B3) > At least 4 bytes overflown > --------------------------------------- Zend/zend_language_scanner.l(704) is below code. > efree(SCNG(script_org)); SCNG(script_org)' is saved by zend_save_lexical_state()' function, and restored by `zend_restore_lexical_state()' function. SCNG(script_org)' is unsigned char*', but only the pointers are stored and saved, not the string pointed to. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=52797&edit=1