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Bug 602927 - RHEL 6 KVM Host crash when running netperf from one RHEL6 guest
Summary: RHEL 6 KVM Host crash when running netperf from one RHEL6 guest
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: kernel
Version: 6.0
Hardware: x86_64
OS: Linux
urgent
urgent
Target Milestone: beta
: ---
Assignee: Herbert Xu
QA Contact: Virtualization Bugs
URL:
Whiteboard:
: 603193 603293 604985 (view as bug list)
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-06-11 02:59 UTC by Qianfeng Zhang
Modified: 2013-01-09 22:43 UTC (History)
10 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2010-11-11 15:40:20 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
libvirt XML for the testing guest (2.04 KB, application/xml)
2010-06-11 03:00 UTC, Qianfeng Zhang 		no flags Details
dmesg from the vmcore collected using kdump (5.21 KB, text/plain)
2010-06-11 03:01 UTC, Qianfeng Zhang 		no flags Details
Revert "[net] bridge: make bridge support netpoll" (5.66 KB, patch)
2010-06-15 12:16 UTC, Herbert Xu 		no flags Details | Diff
View All

Description Qianfeng Zhang 2010-06-11 02:59:24 UTC 
* Description of problem:

  When vhost-net is enabled as a backend on the RHEL6 KVM host,  running netperf on the  RHEL6 guest (again the host) will make the host panic. If 
vhost-net is not loaded, with the same test, the issue doesn't occur.  

   ( the  attached  rhel6-212-g1.xml  is the libvirt XML for the guest, 
      dmesg.txt is the dmesg from the vmcore collected using kdump ) 


* Software  Versions 
   a) On the RHEL6 host

      kernel-2.6.32-31.el6.x86_64
      libvirt-0.8.1-7.el6.x86_64
      qemu-kvm-0.12.1.2-2.68.el6.x86_64

   b) Kernel version on the RHEL6 guest
      kernel-2.6.32-23.el6.x86_64

   c) netperf is from 
      ftp://ftp.netperf.org/netperf/netperf-2.4.5.tar.gz

* The issue is very easy to produce

* To produce

   step 1) on the host
        #> modprobe vhost-net
        #> virsh start  rhel6-212-g1
        #> netserver

   step 2) on the guest
        #> netperf -H 192.168.122.1 -l 180 -t TCP_STREAM -c
   

  


Additional info:
Comment 1 Qianfeng Zhang 2010-06-11 03:00:45 UTC 
Created attachment 423120 [details]
libvirt XML for the testing guest
Comment 2 Qianfeng Zhang 2010-06-11 03:01:38 UTC 
Created attachment 423121 [details]
dmesg from the vmcore  collected using kdump
Comment 4 RHEL Program Management 2010-06-11 03:23:19 UTC 
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release.  Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release.  This request is not yet committed for
inclusion.
Comment 5 Herbert Xu 2010-06-15 12:04:45 UTC 
*** Bug 603193 has been marked as a duplicate of this bug. ***
Comment 6 Herbert Xu 2010-06-15 12:06:59 UTC 
*** Bug 603293 has been marked as a duplicate of this bug. ***
Comment 8 Herbert Xu 2010-06-15 12:16:44 UTC 
Created attachment 424131 [details]
Revert "[net] bridge: make bridge support netpoll"

This patch reverts

commit 460d5c086f08eff12b4c862c9a1c412cda4e8e7e
Author: Amerigo Wang <amwang>
Date:   Sat May 22 09:16:06 2010 -0400

    [net] bridge: make bridge support netpoll

as it introduced a use-after-free bug on the bridge transmit path that affects all bridge users, regardless of whether netpoll is enabled or not.
Comment 9 Herbert Xu 2010-06-17 13:42:33 UTC 
*** Bug 604985 has been marked as a duplicate of this bug. ***
Comment 10 Aristeu Rozanski 2010-06-17 15:38:51 UTC 
Patch(es) available on kernel-2.6.32-36.el6
Comment 13 Keqin Hong 2010-06-21 07:20:19 UTC 
Verified on kernel-2.6.32-37.el6 using steps mentioned in Comment 0, PASS.

host info:
qemu-kvm-0.12.1.2-2.77.el6.x86_64
kernel-2.6.32-37.el6

Also tested according to https://bugzilla.redhat.com/show_bug.cgi?id=603293#c0, no kernel panic either.
Comment 14 Keqin Hong 2010-06-29 02:36:05 UTC 
set VERIFIED according to Comment 13
Comment 15 releng-rhel@redhat.com 2010-11-11 15:40:20 UTC 
Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.
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