This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1991664
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Changed in: linux (Ubuntu Jammy)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1991664
Title:
backport dkms fixes to build modules correctly for hwe-5.19+ kernels
Status in dkms package in Ubuntu:
Triaged
Status in linux package in Ubuntu:
Incomplete
Status in zfs-linux package in Ubuntu:
New
Status in dkms source package in Jammy:
Triaged
Status in linux source package in Jammy:
Incomplete
Status in zfs-linux source package in Jammy:
New
Bug description:
[ Impact ]
* hwe-5.19 kernel has to be compiled with gcc-12+ for the new
security kernel config options that have been enabled in that kernel
(init zero structs).
* dkms needs to be patched to attempt to use the same compiler as was
used to build the kernel, specifically use gcc for v5.15 but gcc-12
for v5.19+ in jammy
* dkms autopkgtests also need to be improved to ensure there are no
false negatives when kernel has module under test already built-in at
the same version.
* because linux-headers packages in Ubuntu do not depend on a
toolchain, and it is very hard to correctly depend on a native or
cross-toolchain, add gcc-12 dependency in the dkms package.
[ Test Plan ]
* Retrigger dkms module test for a built-in package of the same
version as already built into the kernel, for example zfs-linux dkms.
It should pass.
* Attempt to build dkms modules against v5.15 kernel and v5.19 kernel
from proposed. dkms module should be built with gcc and gcc-12
respectively.
[ Where problems could occur ]
* New gcc-12 dependency on the dkms package may result in two
compilers being installed in the Ubuntu Desktop Live image
* New gcc-12 dependency may prevent automatic upgrade/installation of
the dkms package update via unattended upgrades.
[ Other Info ]
* It is questionable for dkms to depend on any c-compiler, given that a
module for a given kernel can really be built with the same toolchain and the
same compiler features.
* In debian, linux kernel packages ship and extra configuration file
in the kernel headers, dkms uses said configuration file to use a
matching compiler, and linux-headers packages depend on the toolchain
used to build a given kernel. Maybe in the future Ubuntu could
consider using the same packaging.
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