Re: [PATCH 0/5] RDMA: reg_remote_mr

[Steve Wise]

On 1/29/2019 7:26 AM, Joel Nider wrote:
> As discussed at LPC'18, there is a need to be able to register a memory
> region (MR) on behalf of another process. One example is the case of
> post-copy container migration, in which CRIU is responsible for setting
> up the migration, but the contents of the memory are from the migrating
> process. In this case, we want all RDMA READ requests to be served by
> the address space of the migration process directly (not by CRIU). This
> patchset implements a new uverbs command which allows an application to
> register a memory region in the address space of another process.

Hey Joel,

Dumb question:

Doesn't this open a security hole by allowing any process to register
memory in any other process?

Steve.