From: [EMAIL PROTECTED] Operating system: n/a PHP version: 5.3CVS-2008-09-22 (CVS) PHP Bug Type: Streams related Bug description: after stream seek, appending stream filter reads incorrect data
Description: ------------ appending a stream filter to a stream that has already had data read into its buffer can cause unfiltered data to be read back in. This is because the data is written to writepos, but read from readpos, and so the buffer should be invalidated (writepos/readpos set to 0) prior to writing back the filtered data. This bug affects all PHP versions, and will be fixed in 5.2, 5.3, and 6.0 by me, I have a working patch ready to commit momentarily This bug was causing ext/phar/tests/zip/badalias.phpt to fail Reproduce code: --------------- execute within php5/ext/phar/tests/zip: <?php $a = fopen(dirname(__FILE__) . '/files/' . "badalias1.phar.zip", 'rb'); fseek($a, 37); // seek to zip header $b = fread($a, 30); fseek($a, 82); // seek to file data stream_filter_append($a, 'zlib.inflate', STREAM_FILTER_READ); var_dump(fread($a, 8)); ?> Expected result: ---------------- string(8) "hi/there" Actual result: -------------- string(8) "���/�H-J" -- Edit bug report at http://bugs.php.net/?id=46147&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=46147&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=46147&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=46147&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=46147&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=46147&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=46147&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=46147&r=needscript Try newer version: http://bugs.php.net/fix.php?id=46147&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=46147&r=support Expected behavior: http://bugs.php.net/fix.php?id=46147&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=46147&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=46147&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=46147&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=46147&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=46147&r=dst IIS Stability: http://bugs.php.net/fix.php?id=46147&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=46147&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=46147&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=46147&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=46147&r=mysqlcfg
