Bug #61106 [NEW]: Segfault when using header_register_callback

From: nikic Operating system: PHP version: Irrelevant Package: Reproducible crash Bug Type: Bug Bug description:Segfault when using header_register_callback Description: ------------ Using header_register_callback may cause crashes due to a double zval_ptr_dtor. The double zval_ptr_dtor occurs in http://lxr.php.net/xref/PHP_TRUNK/main/SAPI.c#sapi_deactivate in lines http://lxr.php.net/xref/PHP_TRUNK/main/SAPI.c#498 and http://lxr.php.net/xref/PHP_TRUNK/main/SAPI.c#546. For me the issue is quite hard to reproduce reliably (especially after accidentally removing my only non-random reproduce script ^^), but I think it should be obvious that the double dtoring can cause a segfault if you try hard. The issue can be fixed by removing one of the two calls. -- Edit bug report at https://bugs.php.net/bug.php?id=61106&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=61106&r=trysnapshot54 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=61106&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=61106&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=61106&r=fixed Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=61106&r=needdocs Fixed in release: https://bugs.php.net/fix.php?id=61106&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=61106&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=61106&r=needscript Try newer version: https://bugs.php.net/fix.php?id=61106&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=61106&r=support Expected behavior: https://bugs.php.net/fix.php?id=61106&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=61106&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=61106&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=61106&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=61106&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=61106&r=dst IIS Stability: https://bugs.php.net/fix.php?id=61106&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=61106&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=61106&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=61106&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=61106&r=mysqlcfg