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Bug #31732 mb_get_info causes seg fault
Submitted: 2005-01-28 01:23 UTC Modified: 2005-01-28 02:58 UTC
From: clewis at myfonts dot com Assigned:
Status: Closed Package: Reproducible crash
PHP Version: 5.0.3 OS: RedHat Enterprise 3
Private report: No CVE-ID:
 [2005-01-28 01:23 UTC] clewis at myfonts dot com
Description:
------------
Calling the mb_get_info() function causes segmentation fault.  This happens both as Apache module and CLI.

The other mb_* functions work fine, it's just the info that causes a problem.

Compiled with: 
'./configure' '--prefix=/usr/local' '--with-apache=../apache' '--with-mysql=/usr/local/mysql' '--with-curl=/usr/local' '--with-gd' '--with-mcrypt=/usr/local' '--enable-mbstring' '--with-zlib' '--with-iconv' '--with-pspell=/usr/local' '--with-curlwrappers' '--enable-soap' '--with-libxml-dir=/usr/local' '--without-sqlite'


Reproduce code:
---------------
<?php
var_dump(mb_get_info());
?>


Expected result:
----------------
Multi-byte string library info.

Actual result:
--------------
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1218546240 (LWP 11950)]
0x00aa7f38 in strcasecmp () from /lib/tls/libc.so.6
(gdb) bt
#0  0x00aa7f38 in strcasecmp () from /lib/tls/libc.so.6
#1  0x080b9f0d in zif_mb_get_info (ht=0, return_value=0xb62898, this_ptr=0x0, 
    return_value_used=1) at /usr/local/src/currentstuff/php-5.0.3/ext/mbstring/mbstring.c:3219
#2  0x081d04d6 in zend_do_fcall_common_helper (execute_data=0xbfffb150, opline=0x9d69d9c, 
    op_array=0x9d65c4c) at /usr/local/src/currentstuff/php-5.0.3/Zend/zend_execute.c:2711
#3  0x081cdad2 in execute (op_array=0x9d65c4c)
    at /usr/local/src/currentstuff/php-5.0.3/Zend/zend_execute.c:1400
#4  0x081b3c77 in zend_execute_scripts (type=8, retval=0x0, file_count=3)
    at /usr/local/src/currentstuff/php-5.0.3/Zend/zend.c:1069
#5  0x08186a73 in php_execute_script (primary_file=0xbfffd510)
    at /usr/local/src/currentstuff/php-5.0.3/main/main.c:1628
#6  0x081d6c64 in main (argc=2, argv=0xbfffd5d4)
    at /usr/local/src/currentstuff/php-5.0.3/sapi/cli/php_cli.c:943


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AllCommentsChangesGit/SVN commitsRelated reports
 [2005-01-28 01:33 UTC] clewis at myfonts dot com
Only happens when no argument is given.  According to the manual, this case should behave as if the argument is 'all'.
 [2005-01-28 02:58 UTC] tony2001@php.net
This bug has been fixed in CVS.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
 
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