[Bug 1866211] Re: [UBUNTU 20.04] valgrind: Recognize z15 and disable deflate-conversion facility bit

[Launchpad Bug Tracker]

This bug was fixed in the package valgrind - 1:3.15.0-1ubuntu9

---------------
valgrind (1:3.15.0-1ubuntu9) focal; urgency=medium

  * Prevent valgrind trying to use unrecognised z14/z15 instructions. LP:
    #1866211

 -- Dimitri John Ledkov <xnox at ubuntu.com>  Fri, 03 Apr 2020 11:34:19
+0100

** Changed in: valgrind (Ubuntu)
       Status: New => Fix Released

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Title:
  [UBUNTU 20.04] valgrind: Recognize z15 and disable deflate-conversion
  facility bit

Status in Ubuntu on IBM z Systems:
  Triaged
Status in valgrind package in Ubuntu:
  Fix Released

Bug description:
  Trying to deflate using zlib under valgrind on z15 causes an
  "unrecognised instruction" crash:

  vex s390->IR: unknown insn: B939 A024
  ==42593== valgrind: Unrecognised instruction at address 0x4acec80.
  ==42593==    at 0x4ACEC80: ??? (in /usr/lib64/libz.so.1.2.11)
  ==42593==    by 0x4AC105B: deflateResetKeep (in /usr/lib64/libz.so.1.2.11)

  In fact, the unrecognised instruction is the "deflate conversion
  call", which is not supported by Valgrind yet.  Thus Valgrind should
  have masked off the respective facility bit, but it didn't.

  Upstream commit 3a2711c659ac839934f13e0529e14d6c15325383 fixes this.
  It will be part of the next Valgrind release 3.16.0.

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