Re: RE: BSOD in GPLPV rev928 in xennet.sys

[Andreas Kinzler <ml-xen-devel@hfp.de>]

>> -----Original Message-----
>> From: Andreas Kinzler [mailto:ml-xen-devel@hfp.de]
>> Sent: Thursday, 9 June 2011 04:38
>> To: xen-devel@lists.xensource.com; James Harper
>> Subject: BSOD in GPLPV rev928 in xennet.sys
>>
>> Hello James,
>>
>> on Windows 2008 R2 SP1 I get a BSOD on GPLPV setup. After some
> analyzing
>> I found that it is a "null ptr read" in the call to
>> NdisFreeToNPagedLookasideList. File is xennet6_tx.c line 336.
>>
>>         length = XenNet_QueryData(&pi, coalesce_remaining);
>>         va = NdisBufferVirtualAddressSafe(pi.curr_mdl,
> LowPagePriority);
>>         if (!va)
>>         {
>>           KdPrint((__DRIVER_NAME "     failed to map buffer va -
> partial
>> send\n"));
>>           coalesce_remaining = 0;
>>           remaining -= min(PAGE_SIZE, remaining);
>>           NdisFreeToNPagedLookasideList(&xi->tx_lookaside_list,
>> coalesce_buf);
>>         }
>>         else
>>         {
>>
> I can't see how that situation could arise without there being some
> memory corruption somewhere... coalesce_buf is checked for NULL before
> the call to NdiFreeToNPageLookasideList. Did you get the "Failed to map
> buffer va - partial send" message in the logs?

I am not running any debuggers, I got the information from analyzing 
disassembled code listings and the minidump. I may have a look at 
debuggers (my time is somewhat limited).

Would you consider the rev928 version stable? What is the latest stable 
version in your opinion?

Regards Andreas