From: piotrek dot pokora at gmail dot com
Operating system: Linux/Debian
PHP version: 5.4.11
Package: CGI/CLI related
Bug Type: Bug
Bug description:php_libxml_initialize overwrites global entity loader
Description:
------------
php_libxml_initialize function in ext/libxml sets global entity loader via
xmlSetExternalEntityLoader(_php_libxml_pre_ext_ent_loader). This affects
any library which is loaded implicitly during loading phase and triggers
segmentation fault.
Gdb output:
Program received signal SIGSEGV, Segmentation fault.
_zend_hash_index_update_or_next_insert (ht=0xd1b910, h=0, pData=<value
optimized out>, nDataSize=16, pDest=0x0, flag=1)
at /app/php-5.4.8/Zend/zend_hash.c:385
385 /app/php-5.4.8/Zend/zend_hash.c: No such file or directory.
in /app/php-5.4.8/Zend/zend_hash.c
(gdb) bt
#0 _zend_hash_index_update_or_next_insert (ht=0xd1b910, h=0, pData=<value
optimized out>, nDataSize=16, pDest=0x0, flag=1)
at /app/php-5.4.8/Zend/zend_hash.c:385
#1 0x000000000068f600 in zend_list_insert (ptr=<value optimized out>,
type=<value optimized out>) at /app/php-5.4.8/Zend/zend_list.c:46
#2 0x000000000068f61e in zend_register_resource (rsrc_result=0x0,
rsrc_pointer=0x7ffff7fad2c8, rsrc_type=-134556984)
at /app/php-5.4.8/Zend/zend_list.c:98
#3 0x00000000006392d6 in php_stream_context_alloc () at
/app/php-5.4.8/main/streams/streams.c:2199
#4 0x0000000000455035 in php_libxml_streams_IO_open_wrapper
(filename=0xea1990 "/app/libgda/share/libgda-4.0/dtd/libgda-array.dtd",
mode=0xa71434 "rb", read_only=1) at
/app/php-5.4.8/ext/libxml/libxml.c:334
#5 0x000000000045509f in php_libxml_streams_IO_open_read_wrapper
(URI=0x7ffff7fad2c8 "0\320\372\367\377\177", enc=XML_CHAR_ENCODING_NONE)
at /app/php-5.4.8/ext/libxml/libxml.c:345
#6 php_libxml_input_buffer_create_filename (URI=0x7ffff7fad2c8
"0\320\372\367\377\177", enc=XML_CHAR_ENCODING_NONE)
at /app/php-5.4.8/ext/libxml/libxml.c:386
#7 0x00007ffff6dc7d8d in xmlNewInputFromFile () from
/usr/lib/libxml2.so.2
#8 0x000000000045681b in _php_libxml_pre_ext_ent_loader (URL=0xea1990
"/app/libgda/share/libgda-4.0/dtd/libgda-array.dtd", ID=0x0,
context=0xe9e0b0) at /app/php-5.4.8/ext/libxml/libxml.c:694
#9 0x00007ffff6e8d59b in xmlSAX2ResolveEntity () from
/usr/lib/libxml2.so.2
#10 0x00007ffff6de35a5 in xmlSAXParseDTD () from /usr/lib/libxml2.so.2
#11 0x00007ffff5687307 in gda_init () at gda-init.c:198
#12 0x00007ffff610c249 in midgard_init () at src/midgard.c:138
#13 0x00007ffff639cb61 in zm_startup_midgard2 (type=1, module_number=28) at
/app/midgard-php5-10.05.7/midgard.c:324
Steps from #11 to #8 clearly shows that php's hook is wrong in this case.
It doesn't happen with PHP 5.3, where global hook is not set.
--
Edit bug report at https://bugs.php.net/bug.php?id=64017&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=64017&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=64017&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=64017&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=64017&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=64017&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=64017&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=64017&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=64017&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=64017&r=support
Expected behavior: https://bugs.php.net/fix.php?id=64017&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=64017&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=64017&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=64017&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=64017&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=64017&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=64017&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=64017&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=64017&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=64017&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=64017&r=mysqlcfg
