Re: [PATCH 3.2 055/152] x86_64, switch_to(): Load TLS descriptors before switching DS and ES

Denys Vlasenko
2015-02-24T20:08:28Z

On Tue, Feb 24, 2015 at 9:02 PM, Andy Lutomirski <luto@amacapital.net> wrote:
>> This currently fails in 32-bit kernels (at least in qemu):
>>
>> / # ./es_test
>> Allocated GDT index 7
>> [FAIL] ES changed from 0x3b to 0x7b
>> [FAIL] ES was corrupted 1000/1000 times
>> / # uname -a
>> Linux (none) 4.0.0-rc1 #1 SMP Tue Feb 24 16:41:58 CET 2015 i686 GNU/Linux
>
> Want to send a patch? I'll get it in a few days if no one beats me.

I have no patch, sorry (in fact, I failed to find where is the relevant
32-bit counterpart).

It's just security people asked me to backport this and I wondered
maybe I should wait a bit on this one, since fix for 32-bit ought
to appear as well.