Hi all, Controversial and TL;DR version - If one of the kernel devs can update the wiki page here https://wiki.ubuntu.com/Kernel/MainlineBuilds#Mainline_kernel_build_toolchain, then as far as I'm concerned they can close this bug as resolved.
The longer version..... Ubuntu is great! Thank you Debian! Thank you Canonical! In hindsight I probably shouldn't have linked the CVE in comment #33. I wasn't suggesting that Ubuntu was insecure in any way, I just wanted to highlight to those "stuck" on an old (unsupported) mainline kernel that they might have a problem, and need to make alternative arrangements. Ubuntu 20.04 LTS will be supported for a long time however, and it will get regular kernel updates (approx every 6 months) through the HWE/LTS programme. See: https://wiki.ubuntu.com/Kernel/LTSEnablementStack So, in a few months time focal will get a new kernel (5.11 I think) which will be fully supported. Yay! And 6 months after that it will get another new kernel. Double yay! All official Ubuntu kernels get backported security fixes as bugs are found. The 5.4, 5.8, and soon 5.11 kernels will all be kept secure through security updates for the full life time of the LTS release. Ubuntu is not insecure! This bug was opened because the documentation for mainline here https://wiki.ubuntu.com/Kernel/MainlineBuilds#Mainline_kernel_build_toolchain states that the kernels are built with the most recent LTS release. Obviously that is wrong, the mainline kernels are built with the newest/development version of Ubuntu, and the wiki should be updated to reflect that. Now, it would be nice if the mainline build systems were updated to build both the newest and the most recent LTS release, but that sometimes requires additional work. In fact - you can't build the mainline kernel on LTS as it stands, because newer kernels built with the ubuntu kconfig require a newer dwarves package than ships with LTS. If you need to run a newer kernel than is in focal today, then you have several options, one of them is build your own (at least one set of instructions is in this thread somewhere), another is find a PPA (I'm sure one was mentioned in this thread somewhere too), do without the hardware until the next HWE release, or use a newer version of Ubuntu. 2c -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1926938 Title: Recent mainline packages are built with Hirsuite 21.04, not Focal 20.04 LTS Status in linux package in Ubuntu: Confirmed Bug description: Hi all, The Mainline wiki states that the mainline kernels are built with the previous LTS toolchain, but the recent 5.12.x and 5.11.x releases are being built with Hirsuite 21.04, and before that Groovy? If this is intentional, then the wiki should be updated to reflect the change in policy. From https://wiki.ubuntu.com/Kernel/MainlineBuilds Mainline kernel build toolchain These kernels are built with the toolchain (gcc, g++, etc.) from the previous Ubuntu LTS release. (e.g. Ubuntu 14.04 "Trusty Tahr" / 16.04 "Xenial Xerus" / 18.04 "Bionic Beaver", etc.) Therefore, out-of-tree kernel modules you already have built and installed for use with your release kernels are not likely to work with the mainline builds. The 5.12 kernel was built with GCC 10.3.0, and 5.11.16 with 10.2.0. On my Focal LTS system I have GCC 9.3.0. The Mainline kernel build toolchain These kernels are built with the toolchain (gcc, g++, etc.) from the previous Ubuntu LTS release. (e.g. Ubuntu 14.04 "Trusty Tahr" / 16.04 "Xenial Xerus" / 18.04 "Bionic Beaver", etc.) Therefore, out-of-tree kernel modules you already have built and installed for use with your release kernels are not likely to work with the mainline builds. The *linux-headers-generic* packages have unmet dependencies on 20.04 LTS. I could install Groovy built kernels fine, but the Hirsuite ones built with GCC 10.3.0 appear to require libc6 >= 2.33. So the new kernels can't be installed on Focal (libc 2.31). Thanks, Mark To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1926938/+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
