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Bug 1380306 - RHSA-2016-1756 breaks migration of instances
Summary: RHSA-2016-1756 breaks migration of instances
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: qemu-kvm
Version: 7.3
Hardware: Unspecified
OS: Unspecified
urgent
high
Target Milestone: rc
: ---
Assignee: Stefan Hajnoczi
QA Contact: huiqingding
URL:
Whiteboard:
Depends On: 1376542
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-09-29 09:17 UTC by Marcel Kolaja
Modified: 2021-08-30 11:50 UTC (History)
31 users (show)

Fixed In Version: qemu-kvm-1.5.3-105.el7_2.9
Doc Type: Bug Fix
Doc Text:
The fix for CVE-2016-5403 caused migrating guest instances to fail with a "Virtqueue size exceeded" error message. With this update, the value of the virtualization queue is recalculated after the migration, and the described problem no longer occurs.
Clone Of: 1376542
Environment:
Last Closed: 2016-11-09 17:15:17 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Knowledge Base (Solution) 2598111 0 None None None 2016-09-29 09:17:27 UTC
Red Hat Product Errata RHBA-2016:2678 0 normal SHIPPED_LIVE qemu-kvm bug fix update 2016-11-09 22:08:54 UTC

Description Marcel Kolaja 2016-09-29 09:17:01 UTC 
This bug has been copied from bug #1376542 and has been proposed
to be backported to 7.2 z-stream (EUS).
Comment 4 Miroslav Rezanina 2016-09-30 14:42:34 UTC 
Fix included in qemu-kvm-1.5.3-105.el7_2.9
Comment 6 huiqingding 2016-10-09 03:19:09 UTC 
Reproduce this bug using the following version:
kernel-3.10.0-510.el7.x86_64
qemu-kvm-1.5.3-105.el7_2.8.x86_64

Reproduce steps:
1. create a 4M lv
# pvcreate /dev/sdg
# vgcreate testvg /dev/sdg
# lvcreate -L 4M -T testvg/testlv
# lvs
  LV     VG                  Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  home   rhel_hp-dl380pg8-09 -wi-ao---- 212.61g                                                    
  root   rhel_hp-dl380pg8-09 -wi-ao----  50.00g                                                    
  swap   rhel_hp-dl380pg8-09 -wi-ao----  15.75g                                                    
  testlv testvg              twi-a-tz--   4.00m             0.00   0.88  

2. create a data disk image based on the above lv
# qemu-img create -f qcow2 /dev/testvg/testlv 10G

3. boot a rhel7.3 guest with the above data disk image
# /usr/libexec/qemu-kvm \
 -S \
 -name 'rhel7.3' \
 -machine pc \
 -m 4096 \
 -smp 4,maxcpus=4,sockets=1,cores=4,threads=1 \
 -cpu SandyBridge \
 -rtc base=localtime,clock=host,driftfix=slew \
 -nodefaults \
 -boot menu=on \
 -enable-kvm \
 -monitor stdio \
 -drive file=/mnt/rhel7.3.raw,format=raw,id=drive_sysdisk,if=none,cache=none,aio=native,werror=stop,rerror=stop \
 -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x8,drive=drive_sysdisk,bootindex=1 \
  -drive if=none,cache=none,format=qcow2,file=/dev/testvg/testlv,werror=stop,id=drive-virtio-disk0 \
 -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x9,drive=drive-virtio-disk0,id=virtio-disk0 \
 -vga qxl \
 -spice port=5900,disable-ticketing

4. on the same host, use the same command line with "-incoming tcp:0:5800", boot the rhel7.3 guest

5. inside guest
# dd if=/dev/zero of=/dev/vdb oflag=direct bs=4k

6. after guest is paused with io-error, do migration
(qemu) info status
VM status: paused (io-error)
(qemu) migrate -d tcp:0:5800

7. on host, grow the logical volume by 4 MB
# lvresize -L +4M /dev/testvg/testlv

8. in destination, resume the guest
(qemu)c

after step8, "Virtqueue size exceeded" error from destination QEMU and qemu-kvm quits.

Verify this bug using the following version:
kernel-3.10.0-510.el7.x86_64
qemu-kvm-1.5.3-105.el7_2.9.x86_64

Do the above test, after step 8, destination qemu-kvm did not quit and guest can resume normally.
Comment 7 huiqingding 2016-10-09 03:19:53 UTC 
Based on comment #6, set this bug to be verified.
Comment 9 errata-xmlrpc 2016-11-09 17:15:17 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-2678.html
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