Bug #70323 [NEW]: Regression in zend_fetch_debug_backtrace() can cause segfaults

From: aharvey Operating system: Irrelevant PHP version: 7.0Git-2015-08-22 (Git) Package: Reproducible crash Bug Type: Bug Bug description:Regression in zend_fetch_debug_backtrace() can cause segfaults Description: ------------ In PHP 5, zend_fetch_debug_backtrace() checks if the current execute data is NULL before attempting to access fields on that structure. PHP 7's implementation of zend_fetch_debug_backtrace() includes some new code that accesses execute data fields without proper checks, thereby making it possible for the function to segfault if EG(current_execute_data) is NULL. -- Edit bug report at https://bugs.php.net/bug.php?id=70323&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=70323&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=70323&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=70323&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=70323&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=70323&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=70323&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=70323&r=needscript Try newer version: https://bugs.php.net/fix.php?id=70323&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=70323&r=support Expected behavior: https://bugs.php.net/fix.php?id=70323&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=70323&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=70323&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=70323&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=70323&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=70323&r=dst IIS Stability: https://bugs.php.net/fix.php?id=70323&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=70323&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=70323&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=70323&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=70323&r=mysqlcfg