On 05/04/2017 10:48 AM, hch@xxxxxx wrote: > On Thu, May 04, 2017 at 11:43:50AM +0300, Sagi Grimberg wrote: >> I would also suggest that you stop exposing the DMA MR for remote >> access (at least by default) and use a proper reg_mr operations with a >> limited lifetime on a properly sized buffer. > > Yes, exposing the default DMA MR is a _major_ security risk. As soon > as SMC is enabled this will mean a remote system has full read/write > access to the local systems memory. > > There іs a reason why I removed the ib_get_dma_mr function and replaced > it with the IB_PD_UNSAFE_GLOBAL_RKEY key that has _UNSAFE_ in the name > and a very long comment explaining why, and I'm really disappointed that > we got a driver merged that instead of asking on the relevant list on > why a change unexpertong a function it needed happened and instead > tried the hard way to keep a security vulnerarbility alive. > Thanks for pointing out these problems. We will address them. -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
