Control: severity -1 important I don't believe this should be considered an RC bug in Linux packages, but we should still mitigate the problem.
There are three different bugs involved: 1. linux-headers-*-common uses the upstream Makefile, which defaults to attempting a full kernel build. That will always fail, and potentially removes installed files as reported. 2. DKMS (and module-assistant?) do module builds as root by default. 3. Some OOT modules use the now-unsupported SUBDIRS variable instead of M or KBUILD_EXTMOD, triggering bug 1. Due to bug 2, this can remove root-owned files. Bug 3 does/did not only exist in the 2 known bad packages in Debian, but also probably in other older packages and unpackaged modules. So I think we cannot comprehensively fix it or avoid it by using "Breaks" relations. (And I would like to avoid the kernel team having to maintain a list of all currently broken OOT modules.) Bugs 1 and 2 should be fixed, but this probably isn't achievable before the bullseye release. So I propose a mitigation of bug 1: if the Makefile is invoked with SUBDIRS set but neither M nor KBUILD_EXTMOD is also set, we abort the build: https://salsa.debian.org/kernel-team/linux/-/merge_requests/353 Ben. -- Ben Hutchings It is easier to change the specification to fit the program than vice versa.
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