Messages in this thread | | | From | Linus Torvalds <> | Date | Fri, 13 Apr 2018 09:37:28 -0700 | Subject | Re: [RFC PATCH for 4.18 12/23] cpu_opv: Provide cpu_opv system call (v7) |
| |
On Fri, Apr 13, 2018 at 5:16 AM, Mathieu Desnoyers <mathieu.desnoyers@efficios.com> 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
| |