| 2017-11-01 19:05:11 |
David Coronel |
bug |
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added bug |
| 2017-11-01 19:07:27 |
David Coronel |
bug |
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added subscriber Leann Ogasawara |
| 2017-11-01 19:09:46 |
Leann Ogasawara |
bug |
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added subscriber Marcelo Cerri |
| 2017-11-01 19:10:37 |
Leann Ogasawara |
bug |
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added subscriber Canonical Kernel Distro Team |
| 2017-11-01 20:10:09 |
Leann Ogasawara |
bug |
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added subscriber Joshua R. Poulson |
| 2017-11-02 16:19:49 |
Joshua R. Poulson |
description |
<Description to be filled in by Microsoft> |
This request is based on a patch series from linux-next:
commit ab7ff471aa5db670197070760f022622793da7e5
Author: Marcelo Henrique Cerri <marcelo.cerri@canonical.com>
Date: Thu Oct 5 10:34:29 2017 -0300
x86/hyperv: Fix hypercalls with extended CPU ranges for TLB flushing
Do not consider the fixed size of hv_vp_set when passing the variable
header size to hv_do_rep_hypercall().
The Hyper-V hypervisor specification states that for a hypercall with a
variable header only the size of the variable portion should be supplied
via the input control.
For HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX/LIST_EX calls that means the
fixed portion of hv_vp_set should not be considered.
That fixes random failures of some applications that are unexpectedly
killed with SIGBUS or SIGSEGV.
commit 60d73a7c96601434dfdb56d5b9167ff3b850d8d7
Author: Vitaly Kuznetsov <vkuznets@redhat.com>
Date: Thu Oct 5 13:39:24 2017 +0200
x86/hyperv: Don't use percpu areas for pcpu_flush/pcpu_flush_ex structures
hv_do_hypercall() does virt_to_phys() translation and with some configs
(CONFIG_SLAB) this doesn't work for percpu areas, we pass wrong memory to
hypervisor and get #GP. We could use working slow_virt_to_phys() instead
but doing so kills the performance.
Move pcpu_flush/pcpu_flush_ex structures out of percpu areas and
allocate memory on first call. The additional level of indirection gives
us a small performance penalty, in future we may consider introducing
hypercall functions which avoid virt_to_phys() conversion and cache
physical addresses of pcpu_flush/pcpu_flush_ex structures somewhere.
commit a3b7424392924e778b608e30ee321f7b10cc94b8
Author: Vitaly Kuznetsov <vkuznets@redhat.com>
Date: Fri Oct 6 17:48:54 2017 +0200
x86/hyperv: Clear vCPU banks between calls to avoid flushing unneeded vCPUs
hv_flush_pcpu_ex structures are not cleared between calls for performance
reasons (they're variable size up to PAGE_SIZE each) but we must clear
hv_vp_set.bank_contents part of it to avoid flushing unneeded vCPUs. The
rest of the structure is formed correctly.
To do the clearing in an efficient way stash the maximum possible vCPU
number (this may differ from Linux CPU id). |
|
| 2017-11-02 16:20:21 |
Launchpad Janitor |
linux-azure (Ubuntu): status |
New |
Confirmed |
|
| 2017-11-18 01:42:04 |
Marcelo Cerri |
linux-azure (Ubuntu): status |
Confirmed |
In Progress |
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| 2017-11-18 01:42:06 |
Marcelo Cerri |
linux-azure (Ubuntu): assignee |
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Marcelo Cerri (mhcerri) |
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| 2017-11-18 01:42:12 |
Marcelo Cerri |
nominated for series |
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Ubuntu Xenial |
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| 2017-11-20 20:21:11 |
Marcelo Cerri |
information type |
Private |
Public |
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| 2017-11-21 13:57:52 |
Stefan Bader |
bug task added |
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linux-azure (Ubuntu Xenial) |
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| 2017-11-22 12:03:57 |
Marcelo Cerri |
linux-azure (Ubuntu Xenial): status |
New |
In Progress |
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| 2017-11-22 12:03:59 |
Marcelo Cerri |
linux-azure (Ubuntu Xenial): assignee |
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Marcelo Cerri (mhcerri) |
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| 2017-11-22 12:12:01 |
Marcelo Cerri |
linux-azure (Ubuntu): status |
In Progress |
Fix Committed |
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| 2017-11-22 12:12:03 |
Marcelo Cerri |
linux-azure (Ubuntu Xenial): status |
In Progress |
Fix Committed |
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| 2018-01-09 19:07:33 |
Launchpad Janitor |
linux-azure (Ubuntu Xenial): status |
Fix Committed |
Fix Released |
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| 2018-01-09 19:07:33 |
Launchpad Janitor |
cve linked |
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2014-9900 |
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| 2018-01-09 19:07:33 |
Launchpad Janitor |
cve linked |
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2017-1000251 |
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| 2018-01-09 19:07:33 |
Launchpad Janitor |
cve linked |
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2017-1000252 |
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| 2018-01-09 19:07:33 |
Launchpad Janitor |
cve linked |
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2017-1000405 |
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| 2018-01-09 19:07:33 |
Launchpad Janitor |
cve linked |
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2017-16995 |
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| 2018-01-09 19:07:33 |
Launchpad Janitor |
cve linked |
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2017-17862 |
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| 2018-01-09 19:07:33 |
Launchpad Janitor |
cve linked |
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2017-17863 |
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| 2018-01-09 19:07:33 |
Launchpad Janitor |
cve linked |
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2017-17864 |
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| 2018-01-09 19:07:33 |
Launchpad Janitor |
cve linked |
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2017-5123 |
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| 2018-01-09 19:07:33 |
Launchpad Janitor |
cve linked |
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2017-5754 |
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