rdma_cm: fail iwarp accepts w/o connection params

commit f2625f7db4dd0bbd16a9c7d2950e7621f9aa57ad upstream.

cma_accept_iw() needs to return an error if conn_params is NULL.
Since this is coming from user space, we can crash.

Reported-by: Shaobo He <shaobo@cs.utah.edu>
Acked-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>

diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index 1429143301a781ab79245dd92604da2e8ab7847e..ce6a1afcb4108c7451246050d879a99f160e3f8c 100644 (file)
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -2914,6 +2914,9 @@ static int cma_accept_iw(struct rdma_id_private *id_priv,
        struct iw_cm_conn_param iw_param;
        int ret;
 
+       if (!conn_param)
+               return -EINVAL;
+
        ret = cma_modify_qp_rtr(id_priv, conn_param);
        if (ret)
                return ret;