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Bug #8394 pdf_open_image_file() makes PHP segfault
Submitted: 2000-12-23 23:28 UTC Modified: 2001-01-03 10:03 UTC
From: troels at arvin dot dk Assigned:
Status: Closed Package: PDF related
PHP Version: 4.0.4 OS: Linux
Private report: No CVE-ID: None
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From: troels at arvin dot dk
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 [2000-12-23 23:28 UTC] troels at arvin dot dk 
In PHP 4.0.4, pdf_open_image_file() makes PHP segfault.

Things work fine in PHP 4.0.3pl1 with the exact same code and the exact same image. It doesn't matter if pdf_open_image_file() is used with either PNG og JPEG images.

Other PHP-PDFlib functions seem to work well.

At http://troels.arvin.dk/php-bugs/pdf/ I have put all relevant information:
 - The configure-command used
 - Output from the configure-command
 - Demonstration script code and demonstration image
 - GDB-backtrace

For bug isolation, I compiled PHP in the CGI-version with the following configure-switches:
./configure \
        --with-pdflib \
        --without-mysql \
        --disable-session \
        --disable-xml \
        --without-pcre-regex \
        --with-ttf \
        --with-gd \
        --enable-debug

It doesn't help if a more involved configure statement (adding --with-png-dir=..., etc.) is used.

Involved software
------------------------
Operating system: Red Hat Linux 7 (on a PIII CPU system) with all official updates.
(The problem also seems to exist on Red Hat 6.2 hosts).

PDFlib: V. 3.02

Patches

Pull Requests

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 [2000-12-28 11:42 UTC] troels@php.net 
The patch at
http://rpms.arvin.dk/php/source/patches/php-pdf.c.patch
stops the segfauling on Linux. But it will probably result
in segfaults in Windows.

The patch is mostly a port of PHP 3.0.4pl1's pdf.c code.

I'w wondering how virtual_filepath() is meant to be used. In
swf.c and gdttf.c, it's used like this:

#ifdef VIRTUAL_DIR
    // This seems to imply Windows?
    if (virtual_filepath(aaa, &bbb)) {
	// do something if the file isn't there
        return NULL;
    } else {
        // the file is there; do something
    }
#else
    // This seems to imply unix?
    ....
#endif
 [2001-01-03 10:03 UTC] dbeu@php.net 
fixed in cvs
 
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