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

[David Hildenbrand]

On 08.10.19 14:11, Cornelia Huck wrote:
> On Tue, 08 Oct 2019 11:19:25 -0000
> Ivan Warren via <address@hidden> wrote:
> 
>> Public bug reported:
>>
>> 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.
> 
> What version are you using? Current master?
> 
> Can you please share your command line?
> 
>>
>> Without any proof, It looks like a hash calculation bug related to using
>> z/Arch vector facilities...
> 
> Not an unreasonable guess, cc:ing David in case he has seen that before.
> 

Can you reproduce with "-cpu qemu,vx=off" added to the QEMU command
line? Could be some fallout from vector instruction support. Currently
ill, will have a look when I'm feeling better.

-- 

Thanks,

David / dhildenb