On Fri, Apr 13, 2018 at 5:16 AM, Mathieu Desnoyers
<mathieu.desnoyers@xxxxxxxxxxxx> wrote:
> The vmalloc space needed by cpu_opv is bound by the number of pages
> a cpu_opv call can touch.
No it's not.
You can have a thousand different processes doing cpu_opv at the same time.
A *single* cpu_opv may me limited toi "only" a megabyte, but I'm not
seeing any global limit anywhere.
In short, this looks like a guaranteed DoS approach to me.
Linus
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