| 2019-03-06 15:19:22 |
bugproxy |
bug |
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added bug |
| 2019-03-06 15:19:27 |
bugproxy |
tags |
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architecture-s39064 bugnameltc-175967 severity-high targetmilestone-inin1804 |
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| 2019-03-06 15:19:28 |
bugproxy |
ubuntu: assignee |
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Skipper Bug Screeners (skipper-screen-team) |
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| 2019-03-06 15:19:30 |
bugproxy |
affects |
ubuntu |
linux (Ubuntu) |
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| 2019-03-06 15:22:19 |
Frank Heimes |
bug task added |
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ubuntu-z-systems |
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| 2019-03-06 15:22:25 |
Frank Heimes |
ubuntu-z-systems: status |
New |
Triaged |
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| 2019-03-06 15:22:30 |
Frank Heimes |
ubuntu-z-systems: importance |
Undecided |
High |
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| 2019-03-06 15:22:43 |
Frank Heimes |
ubuntu-z-systems: assignee |
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Canonical Kernel Team (canonical-kernel-team) |
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| 2019-03-12 09:12:33 |
Frank Heimes |
bug |
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added subscriber Terry Rudd |
| 2019-03-25 15:43:46 |
Frank Heimes |
description |
---Problem Description---
The vfio-ap driver will create a matrix device in sysfs without a subsystem link. This triggers failures in libudev that might also lead to libvirt errors (e.g. see https://www.redhat.com/archives/libvir-list/2019-February/msg00837.html)
The proper fix is to add a subsystem link (e.g. by providing a dummy bus).
A fix for that is upstream in master branch already for kernel 5.1
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=36360658eb5a6cf04bb9f2704d1e4ce54037ec99
This need to be applied to Bionic, Cosmic and Disco |
SRU Justification:
[Impact]
* The vfio-ap driver will create a matrix device in sysfs without a subsystem link.
* This causes failures in libudev that might also lead to libvirt errors.
* A fix is upstream in master branch for kernel 5.1
[Fix]
* 36360658eb5a6cf04bb9f2704d1e4ce54037ec99 3636065 "s390: vfio_ap: link the vfio_ap devices to the vfio_ap bus subsystem"
[Test Case]
* An s390x machine with at least one CryptoExpress card,
where at least one AP and one 'Domain' is assigned to a particular LPAR.
* Now running virsh nodedev-list before (and later after) construction the matrix device should expose the issue.
* For details about how to setup a vfio-ap matrix device see: http://kvmonz.blogspot.com/2018/12/qemu-v31-released.html
(see 2nd bullet: virtio-ap)
[Regression Potential]
* The regression potential can be considered as low since it only affects the s390x platform
* and there it only affects the usage of AP (CryptoExpress) cards and it's driver/module
* and again only affects the recently introduced virtual IO function of AP (vfio-ap).
[Other Info]
* It was already briefly discussed here:
https://www.redhat.com/archives/libvir-list/2019-February/msg00837.html
as well as reviewed and pushed.
* Commit 3636065 from v5.1-rc1
* This affects ccw cards and their vf only, NOT vf of PCI/PCIe cards!
* For details on virtio-ap/vfio-ap see bullet #2 here: http://kvmonz.blogspot.com/2018/12/qemu-v31-released.html
_________________________
---Problem Description---
The vfio-ap driver will create a matrix device in sysfs without a subsystem link. This triggers failures in libudev that might also lead to libvirt errors (e.g. see https://www.redhat.com/archives/libvir-list/2019-February/msg00837.html)
The proper fix is to add a subsystem link (e.g. by providing a dummy bus).
A fix for that is upstream in master branch already for kernel 5.1
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=36360658eb5a6cf04bb9f2704d1e4ce54037ec99
This need to be applied to Bionic, Cosmic and Disco |
|
| 2019-03-27 13:13:54 |
Seth Forshee |
nominated for series |
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Ubuntu Cosmic |
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| 2019-03-27 13:13:54 |
Seth Forshee |
bug task added |
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linux (Ubuntu Cosmic) |
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| 2019-03-27 13:13:54 |
Seth Forshee |
nominated for series |
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Ubuntu Disco |
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| 2019-03-27 13:13:54 |
Seth Forshee |
bug task added |
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linux (Ubuntu Disco) |
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| 2019-03-27 13:13:54 |
Seth Forshee |
nominated for series |
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Ubuntu Bionic |
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| 2019-03-27 13:13:54 |
Seth Forshee |
bug task added |
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linux (Ubuntu Bionic) |
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| 2019-03-27 13:14:32 |
Seth Forshee |
linux (Ubuntu Disco): status |
New |
Fix Committed |
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| 2019-03-27 13:21:59 |
Frank Heimes |
ubuntu-z-systems: status |
Triaged |
In Progress |
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| 2019-03-29 06:08:46 |
Khaled El Mously |
linux (Ubuntu Bionic): status |
New |
Fix Committed |
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| 2019-03-29 06:08:49 |
Khaled El Mously |
linux (Ubuntu Cosmic): status |
New |
Fix Committed |
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| 2019-03-29 06:39:04 |
Frank Heimes |
ubuntu-z-systems: status |
In Progress |
Fix Committed |
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| 2019-04-04 18:01:52 |
Ubuntu Kernel Bot |
tags |
architecture-s39064 bugnameltc-175967 severity-high targetmilestone-inin1804 |
architecture-s39064 bugnameltc-175967 severity-high targetmilestone-inin1804 verification-needed-cosmic |
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| 2019-04-04 18:04:33 |
Ubuntu Kernel Bot |
tags |
architecture-s39064 bugnameltc-175967 severity-high targetmilestone-inin1804 verification-needed-cosmic |
architecture-s39064 bugnameltc-175967 severity-high targetmilestone-inin1804 verification-needed-bionic verification-needed-cosmic |
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| 2019-04-05 12:49:24 |
Frank Heimes |
tags |
architecture-s39064 bugnameltc-175967 severity-high targetmilestone-inin1804 verification-needed-bionic verification-needed-cosmic |
architecture-s39064 bugnameltc-175967 severity-high targetmilestone-inin1804 verification-done-bionic verification-needed-cosmic |
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| 2019-04-05 13:07:30 |
Frank Heimes |
tags |
architecture-s39064 bugnameltc-175967 severity-high targetmilestone-inin1804 verification-done-bionic verification-needed-cosmic |
architecture-s39064 bugnameltc-175967 severity-high targetmilestone-inin1804 verification-done verification-done-bionic verification-done-cosmic |
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| 2019-04-23 21:35:02 |
Launchpad Janitor |
linux (Ubuntu Cosmic): status |
Fix Committed |
Fix Released |
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| 2019-04-23 21:35:02 |
Launchpad Janitor |
cve linked |
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2017-5715 |
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| 2019-04-24 06:47:01 |
Frank Heimes |
linux (Ubuntu Disco): status |
Fix Committed |
Fix Released |
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| 2019-04-24 07:39:21 |
Launchpad Janitor |
linux (Ubuntu Bionic): status |
Fix Committed |
Fix Released |
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| 2019-04-24 07:39:21 |
Launchpad Janitor |
cve linked |
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2017-5754 |
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| 2019-04-24 07:39:21 |
Launchpad Janitor |
cve linked |
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2018-3639 |
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| 2019-04-24 08:31:37 |
Frank Heimes |
linux (Ubuntu): status |
Fix Committed |
Fix Released |
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| 2019-04-24 08:31:42 |
Frank Heimes |
ubuntu-z-systems: status |
Fix Committed |
Fix Released |
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