[Bug 1889059] Re: [Ubuntu 20.04] zlib on s390x may produce incomplete raw (but not gzip/zlib) streams

[Frank Heimes]

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

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

** Also affects: zlib (Ubuntu Groovy)
   Importance: Undecided
     Assignee: Skipper Bug Screeners (skipper-screen-team)
       Status: New

** Also affects: zlib (Ubuntu Focal)
   Importance: Undecided
       Status: New

** Changed in: zlib (Ubuntu Groovy)
     Assignee: Skipper Bug Screeners (skipper-screen-team) => Canonical Foundations Team (canonical-foundations)

** Changed in: zlib (Ubuntu Focal)
     Assignee: (unassigned) => Canonical Foundations Team (canonical-foundations)

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

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https://bugs.launchpad.net/bugs/1889059

Title:
  [Ubuntu 20.04] zlib on s390x may produce incomplete raw (but not
  gzip/zlib) streams

Status in Ubuntu on IBM z Systems:
  New
Status in zlib package in Ubuntu:
  New
Status in zlib source package in Focal:
  New
Status in zlib source package in Groovy:
  New

Bug description:
  zlib on s390x may produce incomplete raw (but not gzip/zlib) streams

  ---uname output---
  Linux t35lp56.lnxne.boe 5.8.0-20200703.rc3.git0.52a479d42203.300.fc31.s390x #1 SMP Fri Jul 3 00:46:20 CEST 2020 s390x s390x s390x GNU/Linux
   
  Machine Type = z15 
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   Create a raw (negative windowBits value) stream with zlib. EOBS might be missing or truncated.


  This affects all distro levels that contain hardware acceleration
  (DFLTCC) patch. I've attached the preliminary fix.

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