[PHP-DEV] Re: PHP 4.0 Bug #7802 Updated: get_meta_tags() segfaults on certain sites From: Erik Monson (erik.monson <email protected>)
Date: 11/15/00

Hi -

I am using this script to query inappropriate sites (that have been logged as
viewed by our users) and generate a list of keywords for those sites. As a
result, the following URL (that causes a segfault) appears to be an adult site:

http://151.196.200.20

This seems to crash consistantly.

Thanks !!

Erik Monson

On Tue, 14 Nov 2000, you wrote:
> ID: 7802
> Updated by: stas
> Reported By: erik.monson <email protected>
> Status: Feedback
> Bug Type: *URL Functions
> Assigned To:
> Comments:
>
> Can you please give one example of URL where this function
> crashes?
>
>
> Previous Comments:
> ---------------------------------------------------------------------------
>
> [2000-11-14 04:54:26] erik.monson <email protected>
> I am running the php CGI in shell scripts.
>
> A database SELECT downloads a list of websites (that are known to exist) and feeds each IP address like so:
>
>
> $meta_data = get_meta_tags(http://$url);
>
> And it frequently segfaults - often when it reaches the same site. Could it be a problem with the URL? Here is the backtrace on the core from gdb:
>
> Core was generated by `php -q ./test.sh'.
> Program terminated with signal 11, Segmentation fault.
> Reading symbols from /lib/libpam.so.0...done.
> Reading symbols from /lib/libdl.so.2...done.
> Reading symbols from /usr/lib/libsnmp.so.0...done.
> Reading symbols from /usr/lib/libz.so.1...done.
> Reading symbols from /usr/lib/libpng.so.2...done.
> Reading symbols from /usr/lib/libgd.so.1...done.
> Reading symbols from /lib/libresolv.so.2...done.
> Reading symbols from /lib/libm.so.6...done.
> Reading symbols from /lib/libcrypt.so.1...done.
> Reading symbols from /lib/libnsl.so.1...done.
> Reading symbols from /lib/libc.so.6...done.
> Reading symbols from /lib/ld-linux.so.2...done.
> Reading symbols from /usr/lib/gconv/ISO8859-1.so...done.
> Reading symbols from /lib/libnss_files.so.2...done.
> Reading symbols from /lib/libnss_nisplus.so.2...done.
> Reading symbols from /lib/libnss_nis.so.2...done.
> Reading symbols from /lib/libnss_dns.so.2...done.
> #0 0x80f6a5b in zend_hash_find (ht=0x81e9d34, arKey=0x81db49c "keywords",
> nKeyLength=9, pData=0xbfffd720) at zend_hash.c:859
> 859 if ((p->h == h) && (p->nKeyLength == nKeyLength)) {
> (gdb)
> (gdb)
> (gdb)
> (gdb)
> (gdb)
> (gdb)
> (gdb) bt
> #0 0x80f6a5b in zend_hash_find (ht=0x81e9d34, arKey=0x81db49c "keywords",
> nKeyLength=9, pData=0xbfffd720) at zend_hash.c:859
> #1 0x812d1a6 in zend_fetch_dimension_address_inner (ht=0x81e9d34,
> op2=0x81df108, Ts=0xbfffd7c4, type=0) at ./zend_execute.c:521
> #2 0x8124767 in zend_fetch_dimension_address (result=0x81df0e8,
> op1=0x81df0f8, op2=0x81df108, Ts=0xbfffd7c4, type=0)
> at ./zend_execute.c:665
> #3 0x8126890 in execute (op_array=0x81d18fc) at ./zend_execute.c:1185
> #4 0x80f1ed4 in zend_execute_scripts (type=8, file_count=3) at zend.c:717
> #5 0x806090f in php_execute_script (primary_file=0xbffff8e4) at main.c:1200
> #6 0x805e82c in main (argc=3, argv=0xbffff974) at cgi_main.c:715
> (gdb) quit
>
> PHP was compiled with the following 'configure' flags:
>
> ./configure --with-mysql --with-gd --with-snmp --enable-debug --enable-track-vars
>
> Thanks in advance !!
>
> Erik Monson
> erik.monson <email protected>
>
> ---------------------------------------------------------------------------
>
>
> Full Bug description available at: http://bugs.php.net/?id=7802 

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