Re: [Bug 1847232] Re: qemu TCG in s390x mode issue with calculating HASH

[David Hildenbrand]

On 23.10.19 11:37, Ivan Warren wrote:
> Looks fixed to me ! The issue no longer shows even without specifying
> vx=off
> 

Nice, I suspect that there might be more issues when using golang (as it 
really makes excessive use of vector registers to my surprise). So in 
case you run into problems (and especially can't reproduce with vx=off), 
please inform me!

Thanks!

--

Thanks,

David / dhildenb

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https://bugs.launchpad.net/bugs/1847232

Title:
  qemu TCG in s390x mode issue with calculating HASH

Status in QEMU:
  Fix Committed

Bug description:
  When using go on s390x on Debian x64 (buster) (host) and debian s390x
  (sid) (guest) I run into the following problem :

  The following occurs while trying to build a custom project :

  go: github.com/FactomProject/basen@v0.0.0-20150613233007-fe3947df716e:
  Get
  
https://proxy.golang.org/github.com/%21factom%21project/basen/@v/v0.0.0-20150613233007-fe3947df716e.mod:
  local error: tls: bad record MAC

  Doing a git bisect I find that this problem only occurs on and after
  commit 08ef92d556c584c7faf594ff3af46df456276e1b

  Before that commit, all works fine. Past this commit, build always
  fails.

  Without any proof, It looks like a hash calculation bug related to
  using z/Arch vector facilities...

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