Re: [PATCH] RDMA/ucma: reject AF_IB ip multicast requests

On Thu, Mar 29, 2018 at 9:24 PM, Greg Thelen wrote: > syzbot discovered that ucma_join_ip_multicast() mishandles AF_IB request > addresses. If an RDMA_USER_CM_CMD_JOIN_IP_MCAST request has > cmd.addr.sa_family=AF_IB then ucma_join_ip_multicast() reads beyond the > end of its cmd.addr. > > Reject

[PATCH] RDMA/ucma: reject AF_IB ip multicast requests

syzbot discovered that ucma_join_ip_multicast() mishandles AF_IB request addresses. If an RDMA_USER_CM_CMD_JOIN_IP_MCAST request has cmd.addr.sa_family=AF_IB then ucma_join_ip_multicast() reads beyond the end of its cmd.addr. Reject non IP RDMA_USER_CM_CMD_JOIN_IP_MCAST requests. RDMA_USER_CM_CMD