Bug #72982 [NEW]: Memory leak in zend_accel_blacklist_update_regexp() function

From: irishbughunting at gmail dot com Operating system: Any PHP version: 7.0.10 Package: Regexps related Bug Type: Bug Bug description:Memory leak in zend_accel_blacklist_update_regexp() function Description: ------------ Description =========== Due to the zend_accel_blacklist_update_regexp() function not releasing/freeing memory allocated on the heap, a memory leak can occur. This relates to the *it pointer. Code Snippet ============ static void zend_accel_blacklist_update_regexp(zend_blacklist *blacklist) { const char *pcre_error; int i, pcre_error_offset; zend_regexp_list **regexp_list_it, *it; char regexp[12*1024], *p, *end, *c, *backtrack = NULL; ----------SNIP--------- it = (zend_regexp_list*)malloc(sizeof(zend_regexp_list)); if (!it) { zend_accel_error(ACCEL_LOG_ERROR, "malloc() failed\n"); return; } it->next = NULL; if ((it->re = pcre_compile(regexp, PCRE_NO_AUTO_CAPTURE, &pcre_error, &pcre_error_offset, 0)) == NULL) { blacklist_report_regexp_error(pcre_error, pcre_error_offset); } /* prepare for the next iteration */ p = regexp + 2; *regexp_list_it = it; regexp_list_it = &it->next; ----------SNIP--------- Expected result: ---------------- An expected result it that the *it pointer is free'd after finish of use, as opposed to using up unnecessary system resources. Actual result: -------------- A memory leak occurs. -- Edit bug report at https://bugs.php.net/bug.php?id=72982&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=72982&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=72982&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=72982&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=72982&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=72982&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=72982&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=72982&r=needscript Try newer version: https://bugs.php.net/fix.php?id=72982&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=72982&r=support Expected behavior: https://bugs.php.net/fix.php?id=72982&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=72982&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=72982&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=72982&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=72982&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=72982&r=dst IIS Stability: https://bugs.php.net/fix.php?id=72982&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=72982&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=72982&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=72982&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=72982&r=mysqlcfg