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Bug #53005 iconv() fails in ext/iconv/iconv.c php_iconv_string
Submitted: 2010-10-06 22:58 UTC Modified: 2010-10-07 01:45 UTC
From: php at jdrtech dot com Assigned:
Status: Closed Package: Unknown/Other Function
PHP Version: 5.3.3 OS: Solaris 10 Sparc
Private report: No CVE-ID: None
 [2010-10-06 22:58 UTC] php at jdrtech dot com
Description:
------------
PHP runs great with the exception of iconv. I've created a test program that uses libiconv.so.2.5.0 with expected results

CLI command:

>./php ./test.php
Original : This is the Euro symbol '?'.
TRANSLIT : Segmentation Fault (core dumped)

CC: Sun C++ 5.8 2005/10/13
cc: Sun C 5.8 2005/10/13

Configure:

export CC=cc CFLAGS="-xarch=v9a" CXXFLAGS="-xarch=v9a" CPPFLAGS="-I/fcgi/include" LDFLAGS="-L/fcgi/lib"

./configure --prefix=/fcgi --with-mysql=/opt/mysql/mysql --enable-mbstring --with-apache=../apache_1.3.41 -with-dom --with-xsl=/fcgi --with-iconv-dir=/fcgi --enable-debug

>ldd php
        libexslt.so.0 =>         /fcgi/lib/libexslt.so.0
        libpthread.so.1 =>       /lib/64/libpthread.so.1
        libsocket.so.1 =>        /lib/64/libsocket.so.1
        libnsl.so.1 =>   /lib/64/libnsl.so.1
        libm.so.2 =>     /lib/64/libm.so.2
        librt.so.1 =>    /lib/64/librt.so.1
        libmysqlclient.so.16 =>  /usr/local/mysql/lib/libmysqlclient.so.16
        libthread.so.1 =>        /lib/64/libthread.so.1
        libxslt.so.1 =>  /fcgi/lib/libxslt.so.1
        libxml2.so.2 =>  /fcgi/lib/libxml2.so.2
        libresolv.so.2 =>        /lib/64/libresolv.so.2
        libgen.so.1 =>   /lib/64/libgen.so.1
        libiconv.so.2 =>         /fcgi/lib/libiconv.so.2
        libc.so.1 =>     /lib/64/libc.so.1
        libz.so.1 =>     /usr/lib/64/libz.so.1
        libmp.so.2 =>    /lib/64/libmp.so.2
        libmd5.so.1 =>   /lib/64/libmd5.so.1
        libscf.so.1 =>   /lib/64/libscf.so.1
        libaio.so.1 =>   /lib/64/libaio.so.1
        libdoor.so.1 =>  /lib/64/libdoor.so.1
        libuutil.so.1 =>         /lib/64/libuutil.so.1
        /platform/SUNW,Sun-Blade-100/lib/sparcv9/libc_psr.so.1
        /platform/SUNW,Sun-Blade-100/lib/sparcv9/libmd5_psr.so.1



Test script:
---------------
<?php
$text = "This is the Euro symbol '?'.";

echo 'Original : ', $text, PHP_EOL;
echo 'TRANSLIT : ', iconv("UTF-8", "ISO-8859-1//TRANSLIT", $text), PHP_EOL;
echo 'IGNORE   : ', iconv("UTF-8", "ISO-8859-1//IGNORE", $text), PHP_EOL;
echo 'Plain    : ', iconv("UTF-8", "ISO-8859-1", $text), PHP_EOL;

?>


Expected result:
----------------
unknown

Actual result:
--------------
t@1 (l@1) program terminated by signal SEGV (no mapping at the fault address)
0xffffffff7d35a544: _iconv+0x002c:      jmp      %l5
Current function is php_iconv_string
  501                   result = iconv(cd, (char **) &in_p, &in_left, (char **) &out_p, &out_left);


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 [2010-10-07 01:45 UTC] php at jdrtech dot com
-Status: Open +Status: Closed
 [2010-10-07 01:45 UTC] php at jdrtech dot com
needed to do preload, runs great
 [2010-10-13 12:26 UTC] reggaedancer at ymail dot com
Hello, 
I have the same issue on Solaris 10 x86,
PHP 5.3.3
after running iconv PHP script, PHP crashed and created a core dump.
What do you mean by "needed to preload".
How can I fix this issue ?
 [2010-10-13 15:12 UTC] wes at jdrtech dot com
libiconv should provide the preloadable library preloadable_libiconv.so.

I edited apachectl:

--------------------------------------

 case $ARG in
    start)
        LD_PRELOAD_64=/fcgi/lib/preloadable_libiconv.so
        export LD_PRELOAD_64

        if [ $RUNNING -eq 1 ]; then
            echo "$0 $ARG: httpd (pid $PID) already running"
            continue
        fi
------------------------------------

of course your library location may differ, probably /usr/local/lib and LD_PRELOAD_32 if your using 32 bit

good luck
 [2010-10-14 18:18 UTC] reggaedancer at ymail dot com
Ubelievable!!
It really works.
I just added:
LD_PRELOAD_32=/usr/local/lib/preloadable_libiconv.so
export LD_PRELOAD_32
and the Apache/PHP with iconv is working and not crashing anymore.

I tried to use disable_functions in PHP to avoid iconv,
but this preload solution is great.
Thank you very much for your help.
 
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