From: shm Operating system: PHP version: trunk-SVN-2011-11-19 (SVN) Package: BC math related Bug Type: Bug Bug description:bcscale related problem on 64bits platforms
Description: ------------ bcscale uses long typed variable to store scale passed further to bclib calls. Unfortunately bclib uses int type for scale parameter, thus large long numbers (which uses 8 bytes on 64 bits platforms) could be casted to negative number and cause memory corruption as a result of pointer arithmetic with scale param. Test script: --------------- <?php $var48 = bcscale(634314234334311); $var67 = bcsqrt(false); $var414 = bcadd(false,null,10); die('ALIVE'); ?> Expected result: ---------------- ALIVE Actual result: -------------- $ php <?php $var48 = bcscale(634314234334311); $var67 = bcsqrt(false); $var414 = bcadd(false,null,10); die('ALIVE'); ?>^D Segmentation fault: 11 (core dumped) -- Edit bug report at https://bugs.php.net/bug.php?id=60337&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=60337&r=trysnapshot54 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=60337&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=60337&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=60337&r=fixed Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=60337&r=needdocs Fixed in release: https://bugs.php.net/fix.php?id=60337&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=60337&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=60337&r=needscript Try newer version: https://bugs.php.net/fix.php?id=60337&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=60337&r=support Expected behavior: https://bugs.php.net/fix.php?id=60337&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=60337&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=60337&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=60337&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=60337&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=60337&r=dst IIS Stability: https://bugs.php.net/fix.php?id=60337&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=60337&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=60337&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=60337&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=60337&r=mysqlcfg