[UBUNTU 20.04] zkey: Fix display of clear key size for XTS keys

Bug #1860574 reported by bugproxy on 2020-01-22
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Ubuntu on IBM z Systems
Canonical Foundations Team
s390-tools (Ubuntu)
Status tracked in Focal
Skipper Bug Screeners

Bug Description

Description: zkey: Fix display of clear key size for XTS keys
Symptom: The 'zkey list' command shows bogus values for the
               keys 'Clear key size' for XTS keys of type CCA-AESDATA
               or CCA-AESCIPHER.
Problem: XTS keys consist of 2 keys concatenated to each other.
               To calculate the clear key size, the clear key size of
               both keys must be added. The code does not address the
               second key correctly, and thus reads the clear key size
               of the second key from an invalid memory location. This
               results in bogus values reported as clear key size.
               This bug has been introduced with feature "Cipher
               key support" with commit 298fab68fee8 "zkey: Preparations
               for introducing a new key type".
Solution: Correct the addressing of the second key.
Reproduction: Generate an XTS key of type CCA-AESDATA or CCA-AESCIPHER
               and then run 'zkey list'.

Upstream commit:

bugproxy (bugproxy) on 2020-01-22
tags: added: architecture-s39064 bugnameltc-183404 severity-high targetmilestone-inin2004
Changed in ubuntu:
assignee: nobody → Skipper Bug Screeners (skipper-screen-team)
affects: ubuntu → linux (Ubuntu)
Frank Heimes (fheimes) on 2020-01-22
affects: linux (Ubuntu) → s390-tools (Ubuntu)
Changed in ubuntu-z-systems:
importance: Undecided → High
status: New → Triaged
assignee: nobody → Canonical Foundations Team (canonical-foundations)
Changed in s390-tools (Ubuntu Focal):
status: New → Fix Committed
Frank Heimes (fheimes) on 2020-01-30
Changed in ubuntu-z-systems:
status: Triaged → In Progress
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package s390-tools - 2.12.0-0ubuntu1

s390-tools (2.12.0-0ubuntu1) focal; urgency=medium

  * New upstream release, plus cherrypick patches from master.
    LP: #1860574 LP: #1860531 LP: #1859018 LP: #1853308

 -- Dimitri John Ledkov <email address hidden> Wed, 29 Jan 2020 22:27:05 +0000

Changed in s390-tools (Ubuntu Focal):
status: Fix Committed → Fix Released
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