swupdate 2024: Update process fails on trixie builds

Steps to reproduce:

1. Build the base image with SWUpdate feature:

   $ ./kas-container build kas-cip.yml:kas/board/x86-uefi.yml:kas/opt/ebg-swu.yml:kas/opt/trixie.yml

2. After successful build, copy the image artifacts to a separate location:

   build/tmp/deploy/images/x86-uefi/cip-core-image-cip-core-trixie-x86-uefi.wic
   build/tmp/deploy/images/x86-uefi/cip-core-image-cip-core-trixie-x86-uefi.wic.wic.bmap
   
   $ mkdir base-image
   $ cp build/tmp/deploy/images/x86-uefi/wic* base-image/

3. Rebuild the image with the rt kernel as part of the modifications for the update-image:

$ ./kas-container --ssh-dir ~/.ssh/ build kas-cip.yml:kas/board/x86-uefi.yml:kas/opt/ebg-swu.yml:kas/opt/trixie.yml:kas/opt/rt.yml

4. After successful build, the update image will be available as:

build/tmp/deploy/images/x86-uefi/cip-core-image-cip-core-trixie-x86-uefi.swu

5. Boot the SIMATIC IPC device with the base image and apply swupdate with the generated update image

Result:

The SWUpdate process failed with "swupdate_async_start returns -1" error message.

Attached are the detailed logs of the observed error.

swupdate-error-log.txt

Findings:

The same update process was tested using selfbuilt swupdate as done for bookworm [ SWUpdate 2023.12 ] on the Trixie build, and the update completed successfully without any errors.