Bug 574621

Summary:	Linux pvmmu guests (FC11, FC12, etc) crash on boot on AMD hosts with NPT disabled
Product:	Red Hat Enterprise Linux 5	Reporter:	Marcelo Tosatti <mtosatti>
Component:	kvm	Assignee:	Virtualization Maintenance <virt-maint>
Status:	CLOSED ERRATA	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	high
Version:	5.5	CC:	bhutchings, ehabkost, lihuang, llim, michen, mjenner, pbatkowski, plyons, quintela, ykaul
Target Milestone:	rc	Keywords:	ZStream
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kvm-83-165.el5	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-01-13 23:34:16 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	578577, 578579

Description Marcelo Tosatti 2010-03-18 00:11:46 UTC

KVM: x86: ignore access permissions for hypercall patching

Ignore access permissions while patching hypercall instructions.
Otherwise KVM injects a page fault when trying to patch vmcall
on read-only text regions:

Freeing initrd memory: 8843k freed 
Freeing unused kernel memory: 660k freed 
Write protecting the kernel text: 4780k 
Write protecting the kernel read-only data: 1912k 
BUG: unable to handle kernel paging request at c01292e3
IP: [<c01292e3>] kvm_leave_lazy_mmu+0x43/0x70
*pde = 00910067 *pte = 00129161
Oops: 0003 [#1] SMP

CC: stable
Reported-and-Tested-by: Stefan Bader <stefan.bader>
Signed-off-by: Marcelo Tosatti <mtosatti>

Comment 5 lihuang 2010-03-23 03:12:25 UTC

Hi Marcelo 
   Do we have reproducer for RHEL x86_64 host ?

Comment 6 Marcelo Tosatti 2010-03-23 18:20:05 UTC

*** Bug 575257 has been marked as a duplicate of this bug. ***

Comment 7 Marcelo Tosatti 2010-03-23 18:21:51 UTC

lihuang,

You need an AMD host without NPT and recent Linux guest (Fedora 12 for eg).

Comment 8 Marcelo Tosatti 2010-03-23 18:27:47 UTC

The original report can be found here:

https://bugs.edge.launchpad.net/ubuntu/+source/linux/+bug/531823

Comment 9 lihuang 2010-03-23 20:09:21 UTC

(In reply to comment #7)
> lihuang,
> 
> You need an AMD host without NPT and recent Linux guest (Fedora 12 for eg).    

Yes . did reproduced with Fc12 guest when disable NPT.

Thank you.

Comment 14 Miya Chen 2010-04-08 08:49:10 UTC

Tested in kvm-83-165.el5, this problem does not exist.
cmd:
/usr/libexec/qemu-kvm -no-hpet -rtc-td-hack -usbdevice tablet -smp 2 -m 4G -drive file=f12_32.qcow2,if=ide -net nic,vlan=0,macaddr=20:88:99:11:99:11 -net tap,vlan=0,script=/etc/qemu-ifup -uuid `uuidgen` -cpu qemu64,+sse2 -vnc :16 -monitor stdio -boot n

result:
f12_32bit can be installed successfully and then can boot successfully.

Comment 16 Ben Hutchings 2010-04-29 14:10:32 UTC

(In reply to comment #14)
> Tested in kvm-83-165.el5, this problem does not exist.

This package does not seem to be available; is there a timetable to release it?

Comment 17 Marcelo Tosatti 2010-05-17 02:21:18 UTC

*** Bug 590125 has been marked as a duplicate of this bug. ***

Comment 18 Amit Shah 2010-05-18 15:32:23 UTC

*** Bug 590125 has been marked as a duplicate of this bug. ***

Comment 21 Miya Chen 2010-11-02 05:19:26 UTC

Based on comment#14, change status to verified.

Comment 23 errata-xmlrpc 2011-01-13 23:34:16 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2011-0028.html

Comment 24 Glauber Costa 2011-03-01 20:10:43 UTC

*** Bug 648984 has been marked as a duplicate of this bug. ***