From: baco at infomaniak dot ch
Operating system: Linux Debian Sarge
PHP version: 5.1.4
PHP Bug Type: XML related
Bug description: Segfault on xml_parser_create() call
Description:
------------
PHP5 Segmentation fault when a script call
xml_parser_create() under Apache but not when called
from the CLI ?!?
$ wget -O- http://.../xml.php
=> Crash of Apache thread
HTTP request sent, awaiting response...
End of file while parsing headers.
Retrying.
child pid ... exit signal Segmentation fault (11)
$ php xml.php
=> result OK
Reproduce code:
---------------
PHP Code to reproduce the segmentation fault inside Apache
$file = "data.xml";
$data = '';
if (!($fp = fopen($file, "r"))) {
die("could not open XML input");
}
while (!feof($fp)) {
$data .= fread($fp, 8192);
}
fclose($fp);
$xml_parser = xml_parser_create("ISO-8859-1");
# crash at this point
xml_parse_into_struct($xml_parser, $data, $vals, $index);
xml_parser_free($xml_parser);
print_r($vals);
Expected result:
----------------
Expected to return on Apache but only output this when I
call the script from PHP CLI.
Array
(
[0] => Array
(
...
)
...
)
Actual result:
--------------
N.B.
php.ini and php-cli.ini are the same.
ldd on php cli and on libphp5.so both
use same libxml2 from Debian Sarge.
Result
(gdb) continue
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1210239712 (LWP 28800)]
0x0808b14c in XML_ParserFree ()
strace
open("/home/www/29212ea8a58d20e52ba0886bd64685bb/web/test-xml/data.xml",
O_RDONLY) = 7
fstat64(7, {st_mode=S_IFREG|0644, st_size=113, ...}) = 0
lseek(7, 0, SEEK_CUR) = 0
read(7, "<?xml version=\"1.0\" encoding=\"IS"..., 8192) =
113
read(7, "", 8192) = 0
close(7) = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
chdir("/opt/apache") = 0
rt_sigaction(SIGSEGV, {SIG_DFL}, {SIG_DFL}, 8) = 0
getpid() = 28871
kill(28871, SIGSEGV) = 0
sigreturn() = ? (mask now [])
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
PHP Compiled with
'./configure' '--prefix=/opt/php' '--mandir=/usr/share/man'
'--with-apxs=/opt/apache/bin/apxs' '--disable-cgi'
'--with-config-file-path=/opt/php/lib' '--disable-sigchild'
'--disable-ipv6' '--disable-all' '--enable-libxml'
'--with-libxml-dir' '--with-openssl' '--with-kerberos'
'--with-pcre-regex' '--with-zlib' '--with-zlib-dir'
'--enable-bcmath' '--enable-calendar' '--enable-ctype'
'--with-curl' '--enable-dom' '--enable-exif' '--enable-ftp'
'--with-openssl-dir' '--with-gd' '--with-jpeg-dir'
'--with-png-dir' '--with-xpm-dir' '--with-ttf'
'--with-freetype-dir' '--enable-gd-native-ttf'
'--with-gettext' '--with-gmp' '--with-iconv' '--with-imap'
'--with-imap-ssl' '--enable-mbstring' '--enable-mbregex'
'--with-mcrypt' '--with-mhash'
'--with-mysql=/opt/misc/mysql'
'--with-mysqli=/opt/misc/mysql/bin/mysql_config'
'--enable-pdo' '--with-pdo-mysql=/opt/misc/mysql'
'--enable-posix' '--enable-session' '--enable-simplexml'
'--enable-soap' '--enable-spl' '--with-tidy'
'--enable-tokenizer' '--enable-wddx' '--enable-xml'
'--with-libexpat-dir' '--with-xmlrpc' '--with-iconv-dir'
'--with-xsl' '--with-pear' '--enable-memory-limit'
'--enable-zend-multibyte' '--with-ming=/opt/misc/ming'
'--enable-debug'
--
Edit bug report at http://bugs.php.net/?id=38017&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=38017&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=38017&r=trysnapshot52
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=38017&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=38017&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=38017&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=38017&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=38017&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=38017&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=38017&r=support
Expected behavior: http://bugs.php.net/fix.php?id=38017&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=38017&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=38017&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=38017&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=38017&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=38017&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=38017&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=38017&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=38017&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=38017&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=38017&r=mysqlcfg
