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Bug 1655826 - kvm_put_msrs: Assertion `ret == cpu->kvm_msr_buf->nmsrs' on Opteron_G3 (MSR 0x10a / arch-capabilities)
Summary: kvm_put_msrs: Assertion `ret == cpu->kvm_msr_buf->nmsrs' on Opteron_G3 (MSR 0...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux Advanced Virtualization
Classification: Red Hat
Component: qemu-kvm
Version: 8.0
Hardware: Unspecified
OS: Unspecified
urgent
high
Target Milestone: rc
: 8.0
Assignee: Bandan Das
QA Contact: jingzhao
URL:
Whiteboard:
: 1657738 (view as bug list)
Depends On: 1651021
Blocks: TRACKER-bugs-affecting-libguestfs
TreeView+ depends on / blocked
 
Reported: 2018-12-04 03:13 UTC by Han Han
Modified: 2019-11-12 00:13 UTC (History)
33 users (show)

Fixed In Version: qemu-3.1.0
Doc Type: If docs needed, set a value
Doc Text:
Clone Of: 1651021
Environment:
Last Closed: 2019-05-29 16:04:28 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
cpuinfo and backtrace (3.73 KB, application/x-gzip)
2018-12-04 03:13 UTC, Han Han 		no flags Details
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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2019:1293 0 None None None 2019-05-29 16:04:47 UTC

Description Han Han 2018-12-04 03:13:00 UTC 
Created attachment 1511169 [details]
cpuinfo and backtrace

On qemu-kvm-3.1.0-0.module+el8+2266+616cf026.next.candidate.x86_64, start with following cmdline:
# LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin QEMU_AUDIO_DRV=spice /usr/libexec/qemu-kvm -name guest=pc,debug-threads=on -cpu Opteron_G3,vme=on,x2apic=on,tsc-deadline=on,hypervisor=on,arat=on,mmxext=on,fxsr_opt=on,pdpe1gb=on,3dnowext=on,3dnow=on,cmp_legacy=on,cr8legacy=on,3dnowprefetch=on,osvw=on,monitor=off -m 1024
qemu-kvm: error: failed to set MSR 0x10a to 0x0
qemu-kvm: /builddir/build/BUILD/qemu-3.1.0/target/i386/kvm.c:2211: kvm_put_msrs: Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed.
[1]    13527 abort (core dumped)  LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin QEMU_AUDIO_DR

It get SIGUSR1 here.
For the backtrace and host cpuinfo, see the attachment.

+++ This bug was initially created as a clone of Bug #1651021 +++

Description of problem:

Error starting domain: internal error: qemu unexpectedly closed the monitor: 2018-11-18T21:51:02.983748Z qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.01H:EDX.ss [bit 27]
2018-11-18T21:51:03.113175Z qemu-system-x86_64: error: failed to set MSR 0x10a to 0x0
qemu-system-x86_64: /builddir/build/BUILD/qemu-3.1.0-rc1/target/i386/kvm.c:2211: kvm_put_msrs: Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed.

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 75, in cb_wrapper
    callback(asyncjob, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 111, in tmpcb
    callback(*args, **kwargs)
  File "/usr/share/virt-manager/virtManager/libvirtobject.py", line 66, in newfn
    ret = fn(self, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/domain.py", line 1400, in startup
    self._backend.create()
  File "/usr/lib64/python3.7/site-packages/libvirt.py", line 1080, in create
    if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
libvirt.libvirtError: internal error: qemu unexpectedly closed the monitor: 2018-11-18T21:51:02.983748Z qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.01H:EDX.ss [bit 27]
2018-11-18T21:51:03.113175Z qemu-system-x86_64: error: failed to set MSR 0x10a to 0x0
qemu-system-x86_64: /builddir/build/BUILD/qemu-3.1.0-rc1/target/i386/kvm.c:2211: kvm_put_msrs: Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed.


# qemu-kvm 
Unable to init server: Could not connect: Connection refused
qemu-system-x86_64: error: failed to set MSR 0x10a to 0x0
qemu-system-x86_64: /builddir/build/BUILD/qemu-3.1.0-rc1/target/i386/kvm.c:2211: kvm_put_msrs: Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed.
Aborted (core dumped)


Version-Release number of selected component (if applicable):

# qemu-kvm --version
QEMU emulator version 3.0.91 (qemu-3.1.0-0.1.rc1.fc30)
Copyright (c) 2003-2018 Fabrice Bellard and the QEMU Project developers

# rpm -q qemu-kvm
qemu-kvm-3.1.0-0.1.rc1.fc30.x86_64

--- Additional comment from Mikhail on 2018-11-18 17:01 EST ---



--- Additional comment from Mikhail on 2018-11-18 22:27:38 EST ---

Latest workable version:

# rpm -q qemu-kvm 
qemu-kvm-3.0.0-1.fc30.x86_64
# qemu-kvm --version
QEMU emulator version 3.0.0 (qemu-3.0.0-1.fc30)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers

--- Additional comment from Cole Robinson on 2018-11-19 10:02:09 EST ---

Thanks for the report. Can you provide:

sudo virsh dumpxml $vmname
/var/log/libvirt/qemu/$vmname.log

--- Additional comment from Mikhail on 2018-11-19 13:23 EST ---



--- Additional comment from Mikhail on 2018-11-19 13:26 EST ---



--- Additional comment from Cole Robinson on 2018-11-19 15:42:20 EST ---

Similar report on the list: https://lists.gnu.org/archive/html/qemu-devel/2018-11/msg03509.html

I'll mention this bug there
Comment 1 Han Han 2018-12-04 03:14:24 UTC 
BTW, it works on qemu-kvm-3.0.0-2.module+el8+2246+78080371
Comment 2 Han Han 2018-12-04 03:19:56 UTC 
A more simple reproduce cmdline:
# /usr/libexec/qemu-kvm
qemu-kvm: error: failed to set MSR 0x10a to 0x0
qemu-kvm: /builddir/build/BUILD/qemu-3.1.0/target/i386/kvm.c:2211: kvm_put_msrs: Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed.
[1]    14428 abort (core dumped)  /usr/libexec/qemu-kvm
Comment 3 Bandan Das 2018-12-04 19:45:03 UTC 
Can you try commit aec5e9c3a94cf8b7920f59bef69a6f426092c4a0 from upstream ?
Alternatively, here's a brew build
https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=19371843
Comment 4 Han Han 2018-12-05 01:47:53 UTC 
(In reply to Bandan Das from comment #3)
> Can you try commit aec5e9c3a94cf8b7920f59bef69a6f426092c4a0 from upstream ?
> Alternatively, here's a brew build
> https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=19371843

This scratch build works. Bug is not reproduced on it.
Comment 5 Danilo Cesar Lemes de Paula 2018-12-07 22:18:26 UTC 
QA_ACK+, please?
Comment 6 Xueqiang Wei 2018-12-12 05:35:20 UTC 
*** Bug 1657738 has been marked as a duplicate of this bug. ***
Comment 10 jingzhao 2019-02-01 03:15:34 UTC 
Reproduce it, please check https://bugzilla.redhat.com/show_bug.cgi?id=1656829#c16

Verified it with qemu-kvm-3.1.0-10.module+el8+2732+3228f155.x86_64


Guest can be boot successfully with following command line:

# /usr/libexec/qemu-kvm -M pc-q35-rhel7.6.0 -vga qxl -monitor stdio -smp 4 -m 8G -vnc :0  -cpu Opteron_G3 -device pcie-root-port,id=root1,slot=0 -drive file=/mnt/rhel76-64-virtio-scsi.qcow2,if=none,id=drive-virtio-disk0,format=qcow2,cache=none,discard=unmap,werror=stop,rerror=stop,aio=threads -device virtio-blk-pci,drive=drive-virtio-disk0,bus=root1,id=virtio-disk0,bootindex=1 -vnc :1


According to above test result, changed to verified
Comment 12 errata-xmlrpc 2019-05-29 16:04:28 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://access.redhat.com/errata/RHBA-2019:1293
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