[Bug 2018293] Re: [UBUNTU 20.04] Crash in zlib deflateBound() function on s390x

[Frank Heimes]

I've created a patched version (first of all for mantic/23.10) that currently builds here:
https://launchpad.net/~fheimes/+archive/ubuntu/lp2018293

Also attaching the debdiff ...

** Patch added: "debdiff_zlib_mantic_from_1.2.13.dfsg-1ubuntu4_to_1.2.13.dfsg-1ubuntu5.diff"
   https://bugs.launchpad.net/ubuntu/+source/zlib/+bug/2018293/+attachment/5690000/+files/debdiff_zlib_mantic_from_1.2.13.dfsg-1ubuntu4_to_1.2.13.dfsg-1ubuntu5.diff

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

** Also affects: zlib (Ubuntu Mantic)
   Importance: Medium
       Status: Triaged

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

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

** Changed in: zlib (Ubuntu Mantic)
       Status: Triaged => In Progress

** Changed in: zlib (Ubuntu Mantic)
     Assignee: (unassigned) => Frank Heimes (fheimes)

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Title:
  [UBUNTU 20.04] Crash in zlib deflateBound() function on s390x

Status in Ubuntu on IBM z Systems:
  Triaged
Status in zlib package in Ubuntu:
  In Progress
Status in zlib source package in Focal:
  New
Status in zlib source package in Jammy:
  New
Status in zlib source package in Lunar:
  New
Status in zlib source package in Mantic:
  In Progress

Bug description:
  Problem Description:
  zlib deflateBound() function can crash on s390x when called before deflateInit().

  Solution: 
  zlib on s390x needs to support calling deflateBound() before deflateInit().

  The fix is squashed into the latest DFLTCC PR:
  https://github.com/madler/zlib/pull/410

  Diff:
  https://github.com/madler/zlib/compare/113203437eda67261848b14b6c80a33ff7e33d34..f6d382a91a4e7d88b9b12ce0ecdffb1783878160

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