#30027 [Opn->Fbk]: segmentation fault in ftp_get/memchr()

ID: 30027 Updated by: rasmus@php.net Reported By: sbrown at truckstuffusa dot com -Status: Open +Status: Feedback Bug Type: Reproducible crash Operating System: Redhat 9 PHP Version: 4.3.8 New Comment: In gdb for that core, could you type: up p s p ptr p e and add the output to this bug please. Previous Comments: ------------------------------------------------------------------------ [2004-09-08 17:00:56] sbrown at truckstuffusa dot com Description: ------------ I'm using PHP 4.3.8 in CLI on a Redhat 9 server. Using the FTP functions to backup some files via FTP. The script connects to a server via FTP, downloads some files and tars them up. I'm getting an intermittent segfault during the download process. By "intermittent", I mean that the fault does not occur every time, nor does it occur after downloading the same file every time. I am connecting to a windows-based host if that matters. I have been able to reproduce this crash on two different systems: ================================ System 1: Redhat 9 PHP 4.3.8 compiled as Apache2 module SMP-based system Config.nice: './configure' \ '--with-mysql' \ '--with-apxs2=/pub/apache/bin/apxs' \ '--with-mcrypt=/usr/local/lib' \ '--with-curl=/usr/local' \ '--enable-ftp' \ '--with-imap=/usr/local/imap' \ '--with-jpeg' \ '--with-jpeg-dir=/usr/local/lib' \ '--with-png' \ '--with-png-dir=/usr/local/lib' \ '--with-zlib-dir=/usr/local/lib' \ '--with-gd' \ '--with-freetype' \ '--with-freetype-dir=/usr/local/lib' \ '--with-ttf' \ '--enable-debug' \ "$@" ===================================== System 2: Redhat 9 PHP 4.3.8 compiled as Apache2 module Single CPU Config.nice: './configure' \ '--with-mysql' \ '--with-apxs2=/pub/apache/bin/apxs' \ '--enable-ftp' \ '--enable-debug' \ "$@" ========================== When this fault occurs, both systems produce identical backtraces: Program received signal SIGSEGV, Segmentation fault. 0x4207bb01 in memchr () from /lib/tls/libc.so.6 (gdb) bt #0 0x4207bb01 in memchr () from /lib/tls/libc.so.6 #1 0x0807ebb0 in ftp_get (ftp=0x8366c4c, outstream=0x83a22f4, path=0x839bcb4 "/x-stuff/ssl/reconcilepo.php", type=FTPTYPE_ASCII, resumepos=0) at /usr/local/src/php-4.3.8/ext/ftp/ftp.c:730 #2 0x0807bf69 in zif_ftp_get (ht=4, return_value=0x839da54, this_ptr=0x0, return_value_used=1) at /usr/local/src/php-4.3.8/ext/ftp/php_ftp.c:637 #3 0x081ecfb0 in execute (op_array=0x836c920) at /usr/local/src/php-4.3.8/Zend/zend_execute.c:1635 #4 0x081ed22b in execute (op_array=0x836d648) at /usr/local/src/php-4.3.8/Zend/zend_execute.c:1679 #5 0x081ed22b in execute (op_array=0x8366b74) at /usr/local/src/php-4.3.8/Zend/zend_execute.c:1679 #6 0x081d9783 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /usr/local/src/php-4.3.8/Zend/zend.c:891 #7 0x0819e9b7 in php_execute_script (primary_file=0xbffffad0) at /usr/local/src/php-4.3.8/main/main.c:1734 #8 0x081f3e3d in main (argc=2, argv=0xbffffb64) at /usr/local/src/php-4.3.8/sapi/cli/php_cli.c:822 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=30027&edit=1