Bug 1644728

Summary:	OSv build fails because of qemu assertion failure
Product:	[Fedora] Fedora	Reporter:	Nadav Har'El <nyh>
Component:	qemu	Assignee:	Fedora Virtualization Maintainers <virt-maint>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	29	CC:	amit, berrange, cfergeau, crobinso, dwmw2, itamar, lantw44, pbonzini, rjones, virt-maint
Target Milestone:	---
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	qemu-3.0.0-2.fc29	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-12-04 03:01:46 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Nadav Har'El 2018-10-31 13:45:52 UTC

Trying "make check" on OSv (https://github.com/cloudius-systems/osv), which runs a virtual machine with qemu/kvm as part of the build process, crashes on my Fedora 29 with qemu-kvm-3.0.0-1.fc29.x86_64, with the following message:


OSv v0.52.0-6-gea75831f
qemu-system-x86_64: /builddir/build/BUILD/qemu-3.0.0/include/exec/memory_ldst_cached.inc.h:85: address_space_stw_le_cached: Assertion `addr < cache->len && 2 <= cache->len - addr' failed.
qemu failed.

The first line ("OSv...") shows the guest started running properly, but then crashed.

I suspect this is the same as https://bugs.launchpad.net/qemu/+bug/1795148 and according to that tracker, the bug was solved upstream and the fix could be backported.

Comment 1 Cole Robinson 2018-10-31 14:10:43 UTC

Thanks for finding the upstream bug, I'll try backporting it

commit db812c4073c77c8a64db8d6663b3416a587c7b4a
Author: Paolo Bonzini <pbonzini>
Date:   Thu Aug 23 14:21:23 2018 +0200

    virtio: update MemoryRegionCaches when guest negotiates features

Comment 2 Paolo Bonzini 2018-10-31 18:09:08 UTC

Yes, it's that commit.  However f29 and rawhide builds are failing like this: https://koji.fedoraproject.org/koji/getfile?taskID=30576602&volume=DEFAULT&name=build.log&offset=-4000

Comment 3 Fedora Update System 2018-11-17 13:44:33 UTC

qemu-3.0.0-2.fc29 has been submitted as an update to Fedora 29. https://bodhi.fedoraproject.org/updates/FEDORA-2018-87f2ace20d

Comment 4 Fedora Update System 2018-11-18 05:21:15 UTC

qemu-3.0.0-2.fc29 has been pushed to the Fedora 29 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-87f2ace20d

Comment 5 Nadav Har'El 2018-12-03 13:08:53 UTC

I can confirm that qemu-kvm-3.0.0-2.fc29, which I got from the testing repository, via "dnf update --enablerepo=updates-testing qemu-kvm", fixes the bug.

Too bad that after two weeks, it still hasn't reached the main updates repository.

Comment 6 Paolo Bonzini 2018-12-03 13:53:21 UTC

I pushed it now.

Comment 7 Fedora Update System 2018-12-04 03:01:46 UTC

qemu-3.0.0-2.fc29 has been pushed to the Fedora 29 stable repository. If problems still persist, please make note of it in this bug report.