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
{
Regards Andreas
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> -----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 someanalyzing> 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? James _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Andreas Kinzler
2011-Jun-10 08:44 UTC
Re: [Xen-devel] RE: BSOD in GPLPV rev928 in xennet.sys
>> -----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 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel