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[2001-04-25 14:10 UTC] vvtk at stealthcomp dot com
Segmentation fault with next script
<?
function my_h($str){
global $HTTP_ACCEPT_ENCODING,$NO_COMPRESS;
$size = strlen($contents);
$crc32 = crc32($contents);
Header("Etag: VT".$crc32);
$size = strlen($contents);
$crc32 = crc32($contents);
// compressed output: set header
$ENCODING = "gzip";
header("Content-Encoding: $ENCODING");
$ret = "\x1f\x8b\x08\x00\x00\x00\x00\x00";
$ret .= substr($gzcontent, 0, strlen($gzcontent) - 4);
$ret .= pack('V',$crc32);
$ret .= pack('V',$size);
return $ret;
if ($NO_COMPRESS) {return $str;}
return $str.$HTTP_ACCEPT_ENCODING;
}
function TO_LOGIN(){
echo "Login";
exit;
}
ob_start("my_h");
phpinfo();
TO_LOGIN("rr");
?>
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Last updated: Sun Oct 27 16:01:27 2024 UTC |
php4-200104290845 It is minimal script with segfault (after 3-5 times refresh in browser) <? function my_gzhandler($contents){ $headers = getallheaders(); global $TIME_EXECUTION,$USERS_ONLINE; $contents=str_replace("<!-- TIMEEXECUTION -->",$TIME_EXECUTION,$contents); $contents=str_replace("<!-- USERS_ONLINE -->",$USERS_ONLINE,$contents); $gzcontent = gzcompress($contents, 3); $ENCODING = "gzip"; $size = strlen($contents); $crc32 = crc32($contents); header("Content-Encoding: $ENCODING"); $ret = "\x1f\x8b\x08\x00\x00\x00\x00\x00"; $ret .= substr($gzcontent, 0, strlen($gzcontent) - 4); $ret .= pack('V',$crc32); $ret .= pack('V',$size); return $ret; } ob_start("my_gzhandler"); phpinfo(); ?> bt: Program received signal SIGSEGV, Segmentation fault. 0x40104493 in memcpy (dstpp=0xbffff86c, srcpp=0x2164eaf1, len=4) at ../sysdeps/generic/memcpy.c:61 #0 0x40104493 in memcpy (dstpp=0xbffff86c, srcpp=0x2164eaf1, len=4) at ../sysdeps/generic/memcpy.c:61 #1 0x4024e567 in _mem_block_check (ptr=0x810caac, silent=0, __zend_filename=0x40369062 "output.c", __zend_lineno=229, __zend_orig_filename=0x0, __zend_orig_lineno=0) at zend_alloc.c:614 #2 0x4024e52b in _mem_block_check (ptr=0x810caac, silent=1, __zend_filename=0x40369062 "output.c", __zend_lineno=229, __zend_orig_filename=0x0, __zend_orig_lineno=0) at zend_alloc.c:606 #3 0x4024d3f9 in _efree (ptr=0x810caac, __zend_filename=0x40369062 "output.c", __zend_lineno=229, __zend_orig_filename=0x0, __zend_orig_lineno=0) at zend_alloc.c:210 #4 0x40314c93 in php_end_ob_buffer (send_buffer=1 '\001', just_flush=0 '\000') at output.c:229 #5 0x40314d5c in php_end_ob_buffers (send_buffer=1 '\001') at output.c:250 #6 0x4027fc08 in apache_php_module_main (r=0x80e353c, display_source_mode=0) at sapi_apache.c:95 #7 0x40280807 in send_php (r=0x80e353c, display_source_mode=0, filename=0x80e4f44 "/home/httpd/html/3.php") at mod_php4.c:521 #8 0x40280845 in send_parsed_php (r=0x80e353c) at mod_php4.c:532 #9 0x805345e in ap_invoke_handler () from /lib/libnsl.so.1 #10 0x80618fb in ap_some_auth_required () from /lib/libnsl.so.1 #11 0x8061958 in ap_process_request () from /lib/libnsl.so.1 #12 0x805b940 in ap_child_terminate () from /lib/libnsl.so.1 #13 0x805baa7 in ap_child_terminate () from /lib/libnsl.so.1 #14 0x805bba8 in ap_child_terminate () from /lib/libnsl.so.1 #15 0x805c058 in ap_child_terminate () from /lib/libnsl.so.1 #16 0x805c65f in main () from /lib/libnsl.so.1 #17 0x400bc9cb in __libc_start_main (main=0x805c3e0 <main>, argc=2, argv=0xbffffb74, init=0x804f014 <_init>, fini=0x807b99c <_fini>, rtld_fini=0x4000aea0 <_dl_fini>, stack_end=0xbffffb6c) at ../sysdeps/generic/libc-start.c:92