[PATCH] drm/panfrost: Avoid user size passed to kvmalloc()

[Tomeu Vizoso]

On 12/16/21 6:49 PM, Alyssa Rosenzweig wrote:
>> This provides an easy method for user
>> space to trigger the OOM killer (by temporarily allocating large amounts
>> of kernel memory)
> 
> panfrost user space has a lot of easy ways to trigger to the OOM killer
> unfortunately .... if this is something we want to fix there are a lot
> more patches coming :(

What are you thinking of, Alyssa?

My understanding is that the problem are kernel allocations that aren't 
accounted per userspace process. I would expect shmem-backed BOs to be 
taken into account by the OOM killer, so the offending process would be 
terminated without affecting the other processes in the system.

Cheers,

Tomeu