[Bug 1962038] Re: wrong sysrq value in /usr/lib/sysctl.d/50-default.conf

[Launchpad Bug Tracker]

This bug was fixed in the package systemd - 248.3-1ubuntu8.5

---------------
systemd (248.3-1ubuntu8.5) impish; urgency=medium

  * debian/tests/boot-and-services: Ignore failed snap mount units in
test_no_failed (LP: #1967576)

systemd (248.3-1ubuntu8.4) impish; urgency=medium

  [ Lukas Märdian ]
  * Fix deadlock between pid1 and dbus-daemon (LP: #1871538)
    Author: Lukas Märdian
    File: debian/patches/pid1-set-SYSTEMD_NSS_DYNAMIC_BYPASS-1-env-var-for-dbus-da.patch
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=f79535077473902bad911dc2652a2fff4066fa30
  * Don't override Ubuntu's default sysctl values (LP: #1962038)
    Author: Lukas Märdian
    File: debian/patches/debian/UBUNTU-Don-t-override-Ubuntu-s-default-sysctl-values-LP-1962038.patch
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=3ba2764d8f77e616461c9722923f685fad79f8c6

systemd (248.3-1ubuntu8.3) impish; urgency=medium

  [ Jeremy Szu ]
  * Add a allowlist to unblock intel-hid on new HP machines (LP: #1955997)
    Author: Jeremy Szu
    File: debian/patches/lp1955997-add-a-allowlist-to-unblock-intel-hid-on-HP-mach.patch
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=554d46e6a6ab80befd424ead7ffa8e6f993b5f66

 -- Nick Rosbrook <nick.rosbrook at canonical.com>  Fri, 01 Apr 2022
16:39:25 -0400

** Changed in: systemd (Ubuntu Impish)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1962038

Title:
  wrong sysrq value in /usr/lib/sysctl.d/50-default.conf

Status in procps package in Ubuntu:
  Fix Released
Status in systemd package in Ubuntu:
  Fix Released
Status in procps source package in Impish:
  Won't Fix
Status in systemd source package in Impish:
  Fix Released
Status in procps source package in Jammy:
  Fix Released
Status in systemd source package in Jammy:
  Fix Released

Bug description:
  [Impact]

  I've just learned that systemd is setting kernel.sysrq to 16 in
  /usr/lib/sysctl.d/50-default.conf.  This is inconsistent with
  /etc/sysctl.d/10-magic-sysrq.conf which intentionally sets it to 176
  by default.  systemd should drop its setting to defer to the file that
  we have been carrying in procps for a very long time.

  Therefore, users can only sync their storage but not do any other
  actions using the magic sysrq key.

  [Test Plan]

  $ sysctl kernel.sysrq
  => This should show "kernel.sysrq = 176" as set by /etc/sysctl.d/10-magic-sysrq.conf
  $ sysctl net.ipv4.conf.all.rp_filter
  => This should show "net.ipv4.conf.all.rp_filter=2" as set by /etc/sysctl.d/10-network-security.conf

  [Where problems could occur]

   * This patch changes systemd's sysctl configuration in /lib/sysctl.d/*.conf
   * If something is broken it could fail to apply any of systemd's sysctl configuration, but Ubuntu's defaults from /etc/sysctl.d/*.conf would still be in place.

  [Other Info]
   
   * None

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