| 2020-03-05 05:42:04 |
David Monro |
bug |
|
|
added bug |
| 2020-05-20 05:14:58 |
Launchpad Janitor |
linux-kvm (Ubuntu): status |
New |
Confirmed |
|
| 2020-05-20 05:16:17 |
Bernd Wolber |
bug |
|
|
added subscriber Bernd Wolber |
| 2020-06-19 08:12:20 |
Christoph Böhmwalder |
bug |
|
|
added subscriber Christoph Böhmwalder |
| 2020-11-30 12:04:29 |
Tasqa |
bug |
|
|
added subscriber Tasqa |
| 2021-01-04 21:49:21 |
Pedro Principeza |
bug |
|
|
added subscriber Pedro Principeza |
| 2021-01-06 14:07:48 |
Éric St-Jean |
bug |
|
|
added subscriber Éric St-Jean |
| 2021-01-07 08:45:03 |
Christian Ehrhardt |
bug |
|
|
added subscriber Terry Rudd |
| 2021-01-07 08:45:08 |
Christian Ehrhardt |
bug |
|
|
added subscriber Francis Ginther |
| 2021-01-07 08:48:57 |
Christian Ehrhardt |
bug task added |
|
linux (Ubuntu) |
|
| 2021-01-07 09:00:10 |
Ubuntu Kernel Bot |
linux (Ubuntu): status |
New |
Incomplete |
|
| 2021-01-07 14:55:28 |
Dan Streetman |
bug |
|
|
added subscriber Dan Streetman |
| 2021-01-08 17:23:35 |
Thadeu Lima de Souza Cascardo |
linux-kvm (Ubuntu): assignee |
|
Thadeu Lima de Souza Cascardo (cascardo) |
|
| 2021-01-08 17:23:37 |
Thadeu Lima de Souza Cascardo |
linux-kvm (Ubuntu): importance |
Undecided |
High |
|
| 2021-01-08 17:23:41 |
Thadeu Lima de Souza Cascardo |
linux-kvm (Ubuntu): status |
Confirmed |
In Progress |
|
| 2021-01-08 17:31:18 |
Thadeu Lima de Souza Cascardo |
nominated for series |
|
Ubuntu Bionic |
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| 2021-01-08 17:31:18 |
Thadeu Lima de Souza Cascardo |
bug task added |
|
linux (Ubuntu Bionic) |
|
| 2021-01-08 17:31:18 |
Thadeu Lima de Souza Cascardo |
bug task added |
|
linux-kvm (Ubuntu Bionic) |
|
| 2021-01-08 17:31:18 |
Thadeu Lima de Souza Cascardo |
nominated for series |
|
Ubuntu Focal |
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| 2021-01-08 17:31:18 |
Thadeu Lima de Souza Cascardo |
bug task added |
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linux (Ubuntu Focal) |
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| 2021-01-08 17:31:18 |
Thadeu Lima de Souza Cascardo |
bug task added |
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linux-kvm (Ubuntu Focal) |
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| 2021-01-08 17:31:18 |
Thadeu Lima de Souza Cascardo |
nominated for series |
|
Ubuntu Xenial |
|
| 2021-01-08 17:31:18 |
Thadeu Lima de Souza Cascardo |
bug task added |
|
linux (Ubuntu Xenial) |
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| 2021-01-08 17:31:18 |
Thadeu Lima de Souza Cascardo |
bug task added |
|
linux-kvm (Ubuntu Xenial) |
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| 2021-01-08 17:31:18 |
Thadeu Lima de Souza Cascardo |
nominated for series |
|
Ubuntu Groovy |
|
| 2021-01-08 17:31:18 |
Thadeu Lima de Souza Cascardo |
bug task added |
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linux (Ubuntu Groovy) |
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| 2021-01-08 17:31:18 |
Thadeu Lima de Souza Cascardo |
bug task added |
|
linux-kvm (Ubuntu Groovy) |
|
| 2021-01-08 17:44:16 |
Thadeu Lima de Souza Cascardo |
description |
I'm not completely sure which package to log this against.
I'm running the kvm focal minimal cloud image from 20200302. I noticed on boot that there was an error complaining that systemd-systemctl couldn't update pid_max to the value it wanted:
systemd-sysctl[117]: Couldn't write '4194304' to 'kernel/pid_max': Invalid argument
Digging into it a bit more, this comes from /usr/lib/sysctl.d/50-pid-max.conf:
# Bump the numeric PID range to its maximum of 2^22 (from the in-kernel default
# of 2^16), to make PID collisions less likely.
kernel.pid_max = 4194304
However, the linux-image-kvm kernel is compiled with
CONFIG_BASE_SMALL=1
and this triggers the following code in include/linux/threads.h
#define PID_MAX_LIMIT (CONFIG_BASE_SMALL ? PAGE_SIZE * 8 : \
(sizeof(long) > 4 ? 4 * 1024 * 1024 : PID_MAX_DEFAULT))
which means that if CONFIG_BASE_SMALL is set we get a maximum limit of PAGE_SIZE * 8, which on x86 would be 32768.
As a workaround I can override it with a file in /etc/sysctl.d/ but this shouldn't be needed.
I really don't know if CONFIG_BASE_SMALL makes any sense on x86 cloud images, they really aren't small machines in the scheme of things!
Cheers
David |
[Impact]
systemd-systemctl will fail to set kernel.pid_max, leading to a degraded boot.
[Fix]
Set CONFIG_BASE_FULL=y, CONFIG_BASE_SMALL=0.
[Test case]
Write 419304 to /proc/sys/kernel/pid_max.
[Potential regression]
Boot time may be affected.
====================================================================
I'm not completely sure which package to log this against.
I'm running the kvm focal minimal cloud image from 20200302. I noticed on boot that there was an error complaining that systemd-systemctl couldn't update pid_max to the value it wanted:
systemd-sysctl[117]: Couldn't write '4194304' to 'kernel/pid_max': Invalid argument
Digging into it a bit more, this comes from /usr/lib/sysctl.d/50-pid-max.conf:
# Bump the numeric PID range to its maximum of 2^22 (from the in-kernel default
# of 2^16), to make PID collisions less likely.
kernel.pid_max = 4194304
However, the linux-image-kvm kernel is compiled with
CONFIG_BASE_SMALL=1
and this triggers the following code in include/linux/threads.h
#define PID_MAX_LIMIT (CONFIG_BASE_SMALL ? PAGE_SIZE * 8 : \
(sizeof(long) > 4 ? 4 * 1024 * 1024 : PID_MAX_DEFAULT))
which means that if CONFIG_BASE_SMALL is set we get a maximum limit of PAGE_SIZE * 8, which on x86 would be 32768.
As a workaround I can override it with a file in /etc/sysctl.d/ but this shouldn't be needed.
I really don't know if CONFIG_BASE_SMALL makes any sense on x86 cloud images, they really aren't small machines in the scheme of things!
Cheers
David |
|
| 2021-01-08 17:54:05 |
Thadeu Lima de Souza Cascardo |
linux-kvm (Ubuntu Xenial): importance |
Undecided |
High |
|
| 2021-01-08 17:54:05 |
Thadeu Lima de Souza Cascardo |
linux-kvm (Ubuntu Xenial): status |
New |
In Progress |
|
| 2021-01-08 17:54:05 |
Thadeu Lima de Souza Cascardo |
linux-kvm (Ubuntu Xenial): assignee |
|
Thadeu Lima de Souza Cascardo (cascardo) |
|
| 2021-01-08 17:54:17 |
Thadeu Lima de Souza Cascardo |
linux-kvm (Ubuntu Bionic): status |
New |
In Progress |
|
| 2021-01-08 17:54:17 |
Thadeu Lima de Souza Cascardo |
linux-kvm (Ubuntu Bionic): assignee |
|
Thadeu Lima de Souza Cascardo (cascardo) |
|
| 2021-01-08 17:54:30 |
Thadeu Lima de Souza Cascardo |
linux-kvm (Ubuntu Bionic): importance |
Undecided |
High |
|
| 2021-01-08 17:54:44 |
Thadeu Lima de Souza Cascardo |
linux-kvm (Ubuntu Focal): importance |
Undecided |
High |
|
| 2021-01-08 17:54:44 |
Thadeu Lima de Souza Cascardo |
linux-kvm (Ubuntu Focal): status |
New |
In Progress |
|
| 2021-01-08 17:54:44 |
Thadeu Lima de Souza Cascardo |
linux-kvm (Ubuntu Focal): assignee |
|
Thadeu Lima de Souza Cascardo (cascardo) |
|
| 2021-01-08 17:55:06 |
Thadeu Lima de Souza Cascardo |
linux-kvm (Ubuntu Groovy): importance |
Undecided |
High |
|
| 2021-01-08 17:55:06 |
Thadeu Lima de Souza Cascardo |
linux-kvm (Ubuntu Groovy): status |
New |
Fix Committed |
|
| 2021-01-08 17:55:06 |
Thadeu Lima de Souza Cascardo |
linux-kvm (Ubuntu Groovy): assignee |
|
Thadeu Lima de Souza Cascardo (cascardo) |
|
| 2021-01-08 17:55:16 |
Thadeu Lima de Souza Cascardo |
linux-kvm (Ubuntu Groovy): status |
Fix Committed |
In Progress |
|
| 2021-01-08 17:55:43 |
Thadeu Lima de Souza Cascardo |
linux-kvm (Ubuntu): importance |
High |
Medium |
|
| 2021-01-08 17:55:43 |
Thadeu Lima de Souza Cascardo |
linux-kvm (Ubuntu): status |
In Progress |
Incomplete |
|
| 2021-01-08 17:55:43 |
Thadeu Lima de Souza Cascardo |
linux-kvm (Ubuntu): assignee |
Thadeu Lima de Souza Cascardo (cascardo) |
|
|
| 2021-01-08 19:47:03 |
Thadeu Lima de Souza Cascardo |
linux (Ubuntu): status |
Incomplete |
Invalid |
|
| 2021-01-08 19:47:34 |
Thadeu Lima de Souza Cascardo |
linux (Ubuntu Xenial): status |
New |
Invalid |
|
| 2021-01-08 19:47:46 |
Thadeu Lima de Souza Cascardo |
linux (Ubuntu Bionic): status |
New |
Invalid |
|
| 2021-01-08 19:47:58 |
Thadeu Lima de Souza Cascardo |
linux (Ubuntu Focal): status |
New |
Invalid |
|
| 2021-01-08 19:48:07 |
Thadeu Lima de Souza Cascardo |
linux (Ubuntu Groovy): status |
New |
Invalid |
|
| 2021-01-15 00:06:11 |
Kelsey Steele |
linux-kvm (Ubuntu Xenial): status |
In Progress |
Fix Committed |
|
| 2021-01-15 00:06:22 |
Kelsey Steele |
linux-kvm (Ubuntu Bionic): status |
In Progress |
Fix Committed |
|
| 2021-01-15 00:06:34 |
Kelsey Steele |
linux-kvm (Ubuntu Focal): status |
In Progress |
Fix Committed |
|
| 2021-01-15 00:06:48 |
Kelsey Steele |
linux-kvm (Ubuntu Groovy): status |
In Progress |
Fix Committed |
|
| 2021-01-26 21:46:06 |
Launchpad Janitor |
linux-kvm (Ubuntu Bionic): status |
Fix Committed |
Fix Released |
|
| 2021-01-26 21:46:06 |
Launchpad Janitor |
cve linked |
|
2020-27777 |
|
| 2021-01-26 21:46:06 |
Launchpad Janitor |
cve linked |
|
2020-28374 |
|
| 2021-01-26 21:46:06 |
Launchpad Janitor |
cve linked |
|
2021-1052 |
|
| 2021-01-26 21:46:06 |
Launchpad Janitor |
cve linked |
|
2021-1053 |
|
| 2021-01-26 21:50:29 |
Launchpad Janitor |
linux-kvm (Ubuntu Focal): status |
Fix Committed |
Fix Released |
|
| 2021-01-26 21:50:29 |
Launchpad Janitor |
cve linked |
|
2020-16120 |
|
| 2021-01-26 21:53:22 |
Launchpad Janitor |
linux-kvm (Ubuntu Groovy): status |
Fix Committed |
Fix Released |
|
| 2021-01-26 21:56:47 |
Launchpad Janitor |
linux-kvm (Ubuntu Xenial): status |
Fix Committed |
Fix Released |
|
| 2021-02-19 23:04:15 |
Launchpad Janitor |
linux-kvm (Ubuntu): status |
Incomplete |
Fix Released |
|
