#41347 [NEW]: checkdnsrr() segfaults on empty hostname

From: spheroid@php.net Operating system: Mac OS X 10.4.9 PHP version: 5.2.2 PHP Bug Type: Network related Bug description: checkdnsrr() segfaults on empty hostname Description: ------------ checkdnsrr() should return FALSE on error, but it segfaults if host argument is an empty string. Reproduce code: --------------- php -r 'var_dump(checkdnsrr("", "A"));' Expected result: ---------------- bool(false) Actual result: -------------- zsh: bus error php -r 'var_dump(checkdnsrr("", "A"));' --- (gdb) run -r 'var_dump(checkdnsrr("", "A"));' Starting program: /usr/local/bin/php -r 'var_dump(checkdnsrr("", "A"));' Reading symbols for shared libraries .+++..+++++..++++.. done Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_PROTECTION_FAILURE at address: 0x00000000 0x901174ed in res_send () -- Edit bug report at http://bugs.php.net/?id=41347&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=41347&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=41347&r=trysnapshot52 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=41347&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=41347&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=41347&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=41347&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=41347&r=needscript Try newer version: http://bugs.php.net/fix.php?id=41347&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=41347&r=support Expected behavior: http://bugs.php.net/fix.php?id=41347&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=41347&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=41347&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=41347&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=41347&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=41347&r=dst IIS Stability: http://bugs.php.net/fix.php?id=41347&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=41347&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=41347&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=41347&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=41347&r=mysqlcfg