[Bug 1996069] Re: [UBUNTU 20.04] zipl: Add secure boot trailer (s390-tools part)

[Frank Heimes]

** Also affects: ubuntu-z-systems
   Importance: Undecided
       Status: New

** Changed in: ubuntu-z-systems
     Assignee: (unassigned) => Skipper Bug Screeners (skipper-screen-team)

** Changed in: linux (Ubuntu)
     Assignee: Skipper Bug Screeners (skipper-screen-team) => (unassigned)

** Package changed: linux (Ubuntu) => s390-tools (Ubuntu)

** Also affects: s390-tools-signed (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: ubuntu-z-systems
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1996069

Title:
  [UBUNTU 20.04] zipl: Add secure boot trailer  (s390-tools part)

Status in Ubuntu on IBM z Systems:
  New
Status in s390-tools package in Ubuntu:
  New
Status in s390-tools-signed package in Ubuntu:
  New

Bug description:
  Description:   zipl: Add secure boot trailer

  Symptom:       Secure boot of Linux will no longer be possible with an upcoming
                 IBM Z firmware update.

  Problem:       New IBM Z firmware requires all signed boot images to contain a
                 trailing data block with a specific format.

  Solution:      Add trailing data block to the zipl stage 3 boot loader image.
  Reproduction:  Apply latest firmware, perform IPL with Secure Boot enabled.

  Fix:           Available upstream with
  Upstream-ID:   5768d55a08e163f718bd87498b9e763687ae7137

  Upstream-Description:

                zipl/boot: add secure boot trailer

                This patch enhances the zipl stage3 loader image adding a trailer as
                required for secure boot by future firmware versions.

                Note: with the change in this patch the padding via objcopy command line
                options is replaced by padding via linker script directives with the
                same effect.

                Signed-off-by: Peter Oberparleiter <oberpar at linux.ibm.com>
                Signed-off-by: Jan Hoeppner <hoeppner at linux.ibm.com>

  
  Signed-off-by: Peter Oberparleiter <oberpar at linux.ibm.com>

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