[Mesa-dev] [PATCH v2 1/5] util/disk_cache: rename mesa cache dir and introduce cache versioning

[Nicholas Miell]

On 08/23/2017 06:23 PM, Matt Turner wrote:
> On Wed, Aug 23, 2017 at 2:32 AM, Timothy Arceri <tarceri at itsqueeze.com> wrote:
>> Steam is already analysing cache items
> 
> What does this mean?

Steam will attempt to download compiled shaders for your GPU and version 
of Mesa, or upload the shaders you compile locally if they're not 
already stored on Valve's servers.

How they verify shaders aren't malicious is an unanswered question.

You can disable this attack surface by setting the 
STEAM_ENABLE_SHADER_CACHE_MANAGEMENT environment variable to 0 before 
starting the Steam client.