On Mon, Jan 27, 2020 at 05:07:06PM -0000, Colin Ian King wrote: > I guess the next question is why dmidecode being run as root is required > on a cloud init?
cloud-init uses DMI data to identify that it is running on certain platforms. It will use /sys/class/dmi/... if available, but falls back to dmidecode in its absence. > What happens when arches don't have DMI data? If running on a platform which identifies itself only via DMI data, cloud-init will incorrectly determine that it is _not_ running on that platform. Given that other arches _can_ provide DMI data, and this cloud-init behaviour is known, I would be surprised if any platform that _relies_ on it would launch a new architecture without DMI support. So if we get no data (instead of a reboot), then I believe the current behaviour is correct. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to dmidecode in Ubuntu. https://bugs.launchpad.net/bugs/1858615 Title: dmidecode triggers system reboot on Inforce 6640 Status in cloud-init: Invalid Status in dmidecode package in Ubuntu: Fix Released Status in dmidecode source package in Bionic: In Progress Status in dmidecode source package in Eoan: In Progress Status in dmidecode source package in Focal: Fix Released Status in dmidecode package in Debian: Unknown Bug description: [Impact] Running 'sudo dmidecode' on non-UEFI ARM systems can cause them to crash/reboot. cloud-init apparently runs dmidecode as root, so it breaks any cloud-init based installation. [Test Case] sudo dmidecode [Fix] Upstream has the following fix: commit e12ec26e19e02281d3e7258c3aabb88a5cf5ec1d Author: Jean Delvare <jdelv...@suse.de> Date: Mon Aug 26 14:20:15 2019 +0200 dmidecode: Only scan /dev/mem for entry point on x86 [Regression Risk] In Ubuntu, dmidecode only builds on amd64, arm64, armhf & i386. The fix is to disable code on !x86, so the regression risk is restricted to ARM platforms, where we know /dev/mem trolling is bad news. To manage notifications about this bug go to: https://bugs.launchpad.net/cloud-init/+bug/1858615/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
