Bug: run-parts called with multiple directories in mainline kernel 7.0.0 package scripts

[Oliver Pauletto]

Hello,

I would like to report a bug in the mainline kernel packages for version 7.0.0 (and also present in 6.19.11).

The preinst, postinst, postrm, and header_postinst scripts in the following packages call run-parts with two directory arguments simultaneously:

linux-image-unsigned-7.0.0-070000-generic_7.0.0-070000.202604122140_amd64.deb
linux-headers-7.0.0-070000-generic_7.0.0-070000.202604122140_amd64.deb

Example from preinst:

run-parts --report --exit-on-error --arg=$version \
--arg=$image_path /etc/kernel/preinst.d /usr/share/kernel/preinst.d

However, the Debian run-parts implementation (from debianutils) only accepts a single DIRECTORY argument. Passing two directories causes the error:

run-parts: missing operand

This prevents the kernel image from being installed entirely, as the preinst script fails before unpacking begins.

The fix is straightforward: split each run-parts call with two directories into two separate sequential calls, one per directory, each guarded by a directory existence check.

This bug affects installation via both the 'mainline' GUI tool and direct dpkg installation. The workaround is to manually patch the maintainer scripts and rebuild the .deb.

System: Linux Mint (Ubuntu-based), amd64
Affected versions: at least 6.19.11 and 7.0.0

Best regards,
Oliver
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