Pkg xen devel - May 2017 - Bug#862493: xen-utils-common: xendomains fails to restore saved domU

Package: xen-utils-common
Version: 4.8.1-1+deb9u1
Severity: important

I've noticed since upgrading to stretch that xendomains is failing to
restore my
saved domUs from a previous shutdown.

Running the save/restore manually gives me more info:

# xl save 2 /var/lib/xen/save/dl
Saving to /var/lib/xen/save/dl new xl format (info 0x3/0x0/1135)
xc: info: Saving domain 2, type x86 PV
xc: Frames: 49152/49152  100%
xc: End of stream: 0/0    0%

# xl restore /var/lib/xen/save/dl
Loading new save file /var/lib/xen/save/dl (new xl fmt info 0x3/0x0/1135)
 Savefile contains xl domain config in JSON format
Parsing config from <saved>
xc: info: Found x86 PV domain from Xen 4.8
xc: info: Restoring domain
xc: error: X86_PV_VCPU_MSRS record truncated: length 8, min 9: Internal error
xc: error: Restore failed (0 = Success): Internal error
libxl: error: libxl_stream_read.c:852:libxl__xc_domain_restore_done: restoring
domain: Success
libxl: error: libxl_create.c:1223:domcreate_rebuild_done: cannot (re-)build
domain: -3
libxl: error: libxl.c:1575:libxl__destroy_domid: non-existant domain 7
libxl: error: libxl.c:1534:domain_destroy_callback: unable to destroy guest with
domid 7
libxl: error: libxl.c:1463:domain_destroy_cb: destruction of domain 7 failed


xendomains config from /etc/default/xendomains:

XENDOMAINS_SAVE=/var/lib/xen/save
XENDOMAINS_RESTORE=true
XENDOMAINS_AUTO=/etc/xen/auto
XENDOMAINS_STOP_MAXWAIT=300




-- System Information:
Debian Release: 9.0
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64
 (x86_64)

Kernel: Linux 4.9.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages xen-utils-common depends on:
ii  lsb-base        9.20161125
ii  python          2.7.13-2
ii  ucf             3.0036
ii  udev            232-23
ii  xenstore-utils  4.8.1-1+deb9u1

xen-utils-common recommends no packages.

xen-utils-common suggests no packages.

-- no debconf information

It looks like the Qubes devs managed to fix this in Xen 4.6 last year:
https://www.mail-archive.com/xen-devel at lists.xen.org/msg75655.html

Can someone investigate this bug?  Not being able to restore saved
domUs is a major roadblock.  It's been three months with no response
and no movement on this issue.

Thanks.


-- 
                                                                      
Mike Edwards                    |   If this email address disappears,   
Unsolicited advertisments to    |   assume it was spammed to death.  To
this address are not welcome.   |   reach me in that case, s/-.*@/@/

"Our progress as a nation can be no swifter than our progress in education.
The human mind is our fundamental resource."
  -- John F. Kennedy

fixed 862493 4.8.4+xsa273+shim4.10.1+xsa273-1+deb9u10
fixed 862493 4.11.1~pre+1.733450b39b-1
thanks

Hi Mike,

I'm going over old bug reports, and for this one, it seems that the fix
you refer to went in 4.9, and was also backported into Xen 4.8.4 as
commit c31070f350 "tools/libxc: Avoid generating inappropriate
zero-content records".

This means it has trickled into Debian as part of stable update
4.8.4+xsa273+shim4.10.1+xsa273-1+deb9u10 on Wed, 15 Aug 2018.

I'm sorry to read that you felt a bit lost without help in 2017.
Unfortunately there was no overly active maintainer team at that time to
guide you.

Have fun,
Hans van Kranenburg

Processing commands for control at bugs.debian.org:
> fixed 862493 4.8.4+xsa273+shim4.10.1+xsa273-1+deb9u10
Bug #862493 [xen-utils-common] xen-utils-common: xendomains fails to restore
saved domU
Marked as fixed in versions
xen/4.8.4+xsa273+shim4.10.1+xsa273-1+deb9u10.
> fixed 862493 4.11.1~pre+1.733450b39b-1
Bug #862493 [xen-utils-common] xen-utils-common: xendomains fails to restore
saved domU
There is no source info for the package 'xen-utils-common' at version
'4.11.1~pre+1.733450b39b-1' with architecture ''
Unable to make a source version for version '4.11.1~pre+1.733450b39b-1'
Marked as fixed in versions 4.11.1~pre+1.733450b39b-1.
> thanks
Stopping processing here.

Please contact me if you need assistance.
-- 
862493: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=862493
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