Changeset - 14ce1e4efb0f
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Bradley Kuhn (bkuhn) - 9 years ago 2015-03-12 15:31:57
bkuhn@ebb.org
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www/conservancy/static/linux-compliance/vmware-lawsuit-faq.html
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@@ -188,97 +188,96 @@ Code, and for which (at least some) source code for which is provided.
 
       released <a href="#diagram">the diagram above</a> to exemplify that
 
       issue.  Conservancy continues to <a href="#court-documents">hope VMware will
 
       agree to make public all court documents</a> as a matter of public
 
       good, since the court documents discuss the specifics of alleged
 
         infringement on Hellwig's copyrights.</p>
 

	
 
       <p>However, Conservancy examined VMware's ESXi 5.5 product in detail
 
       even before Hellwig's enforcement action began.  Below is one example
 
       among many where VMware's CCS was incomplete per GPLv2&sect;2(c) and
 
       GPLv2&sect;3(a).  (One can verify these results by
 
       <a href="#verify">downloading and installing the binary and source
 
       packages for VMware's ESXi 5.5 Update 2</a>.)  Note that this
 
       example below is not necessarily regarding
 
       Hellwig's copyrights; VMware incorporated Linux code copyrighted by
 
       many others as well into their kernel.</p>
 

	
 
       <h4>Example of &ldquo;vmkernel&rdquo;'s combination with Linux code</h4>
 
       <p>As one example, examine the file
 
           called <code>vmkdrivers/src_92/vmklinux_92/vmware/linux_pci.c</code>,
 
           which can be found in the &ldquo;Open Source&rdquo; release for
 
           ESXi 5.5.0 Update 2 (5.5U2).  A small excerpt from that file, found in the
 
           function <code>LinuxPCIDeviceRemoved()</code>, reads as follows:
 
<pre>
 
if (unlikely(
 
  /* NOTE: vmk_PCIGetDeviceName is defined in vmvisor64-vmkernel */
 
  vmk_PCIGetDeviceName(vmkDev, vmkDevName, sizeof(vmkDevName)-1) != VMK_OK))
 
{
 
    vmkDevName[0] = 0;
 
}
 
[...]
 
/* VMKAPI_MODULE_CALL_VOID is a macro calling driver's remove() here */
 
VMKAPI_MODULE_CALL_VOID(pciDevExt->moduleID,
 
                        linuxDev->driver->remove,
 
                        linuxDev);
 
</pre>        
 
</p>
 
<p>The function, <code>vmk_PCIGetDeviceName()</code> must be defined, with an
 
      implementation, for this code above to work, or even compile.
 
      Inside <code>BLD/build/HEADERS/vmkapi-current-all-public/vmkernel64/release/device/vmkapi_pci_incompat.h</code>,
 
      found in the <code>vmkdrivers</code> package of ESXi 5.5U2, shows a
 
      function header definition for <code>vmk_PCIGetDeviceName()</code>.
 
      However, the source of its implementation is not provided there or
 
      anywhere in the source release.</p>
 

	
 
<p>Further evidence that the implementation of this function occurs elsewhere
 
  can by found by running <code>objdump -x</code> on the un-vmtar'ed
 
  <code>vmklinux_9</code> module.  Note the following output in the &ldquo;SYMBOL
 
  TABLE&rdquo; section:
 

	
 
<pre>
 
0000000000000000         *UND*  0000000000000000 vmk_PCIGetDeviceName
 
</pre>
 

	
 
&hellip;and the following lines found in the  &ldquo;RELOCATION RECORDS FOR
 
[.text]&rdquo; section:
 

	
 
<pre>
 
00000000000327ff R_X86_64_PC32     vmk_PCIGetDeviceName+0xfffffffffffffffc
 
0000000000035318 R_X86_64_PC32     vmk_PCIGetDeviceName+0xfffffffffffffffc
 
00000000000387e1 R_X86_64_PC32     vmk_PCIGetDeviceName+0xfffffffffffffffc
 
000000000003cf40 R_X86_64_PC32     vmk_PCIGetDeviceName+0xfffffffffffffffc
 
</pre>
 
</p>
 

	
 
<p>The above two properties both suggest that the <code>vmklinux_9</code>
 
 module requires: (a) a definition of the <code>vmk_PCIGetDeviceName()</code>
 
 function to operate, but (b) that function is not defined
 
 inside <code>vmklinux_9</code> itself.</p>
 

	
 
<p>The definition can however be found in binary-only software provided in
 
  ESXi 5.5U2 &mdash; specifically, inside a file named <code>k.b00</code>,
 
  which is located in partition 5 on a disk where ESXi has been installed (or
 
  in the ESXi 5.5U2 installer ISO image).  Running <code>file</code>
 
  after <code>gunzip</code> on this file yields &ldquo;ELF 64-bit LSB shared
 
  object&rdquo;.  Meanwhile, <code>file k.b00</code> reports &ldquo;gzip
 
  compressed data, was &lsquo;vmvisor64-vmkernel.stripped&rsquo;&rdquo;.
 
  These findings strongly suggests this is an image of the
 
  &ldquo;vmkernel&rdquo; component.  An <code>objdump -x</code> yields this
 
  &ldquo;SYMBOL TABLE&rdquo; section:
 
<pre>
 
000041800036a408 g     F .text  0000000000000137 vmk_PCIGetDeviceName
 
</pre>
 

	
 
&hellip; which indicated these binary file contains the function body
 
for  <code>vmk_PCIGetDeviceName</code>.</p>
 

	
 
<p>Finally, after detailed searching, Conservancy found no evidence that any
 
  other code (other than modified Linux code) makes calls
 
  to <code>vmk_PCIGetDeviceName</code>.  This provides a strong indication
 
  that this function's primary purpose is to combine Linux code with
 
  &ldquo;vmkernel&rdquo;.  Conservancy also found other functions where similar analysis
 
  yields similar results as above.</p>
 

	
 
<p>Given this evidence and related contextual clues, the only logical
 
  conclusions are:
 
    <ul><li><code>vmklinux_9</code>, as a binary object, dynamically links
 
 with <code>k.b00</code>, another binary object, to form a single running
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