#47940 [NEW]: imap_body causes memory leak

From: jake dot levitt at mailtrust dot com Operating system: Ubuntu 8.04 (linux:2.6.24-21) PHP version: 5.2.9 PHP Bug Type: Reproducible crash Bug description: imap_body causes memory leak Description: ------------ I am creating a script that migrates e-mail from one server to another. On really large mailboxes, my script dies with "PHP Fatal error: Out of memory (allocated 13631488) (tried to allocate 3381512 bytes)" even though memory_get_usage() function was reporting that the script was only using around 10 MBs. My memory_limit is set to 1GB (but this isn't coming into play). When I examined the memory usage of the script using ps, I noticed that it would gradually increase until it reached ~92% of system memory (I have 2GB). I eventually found that when I commented out imap_body, the memory usage would stay flat. I wrote a script that can reproduce this bug. I run the script in the background and then watch its memory using: ps -eo pid,ppid,rss,vsize,pcpu,pmem,cmd -ww --sort=pid | grep "\(memory-usage\)\|\(PID\)" | grep -v grep. Please let me know if you need additional information. This script is intended to be run on the cli. Reproduce code: --------------- <?php $flags = '/novalidate-cert'; $host = 'mail.server.com:143'; $username = 'user'; $password = 'pass'; $folder = 'INBOX'; $base_imap_string = '{' . $host . $flags . '}'; $connect_string = $base_imap_string . $folder; $mailbox = @imap_open($connect_string, $username, $password, 0, 3); $reopen_success = imap_reopen($mailbox, $connect_string, 0, 3); $message_ids = imap_search($mailbox, "ALL", SE_UID); for ($i = 0; $i < 10000000; $i++) { imap_body($mailbox, $message_ids[0], FT_UID | FT_PEEK); } Expected result: ---------------- I would expect that memory usage as viewed by the ps command stays relatively flat. Actual result: -------------- Memory usage as viewed by the ps command increases over time until the script eventually dies with an "out of memory" error given. -- Edit bug report at http://bugs.php.net/?id=47940&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=47940&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=47940&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=47940&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=47940&r=fixedcvs Fixed in CVS and need be documented: http://bugs.php.net/fix.php?id=47940&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=47940&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=47940&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=47940&r=needscript Try newer version: http://bugs.php.net/fix.php?id=47940&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=47940&r=support Expected behavior: http://bugs.php.net/fix.php?id=47940&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=47940&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=47940&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=47940&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=47940&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=47940&r=dst IIS Stability: http://bugs.php.net/fix.php?id=47940&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=47940&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=47940&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=47940&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=47940&r=mysqlcfg