IB/mthca: check port validity in modify_qp

Modify_qp should check that the physical port number provided
is a legal value.

Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/mthca/mthca_qp.c b/drivers/infiniband/hw/mthca/mthca_qp.c
index d786ef443614..ea45fa400fab 100644
--- a/drivers/infiniband/hw/mthca/mthca_qp.c
+++ b/drivers/infiniband/hw/mthca/mthca_qp.c
@@ -621,6 +621,12 @@ int mthca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask)
                 return -EINVAL;
         }
 
+        if ((attr_mask & IB_QP_PORT) &&
+            (attr->port_num == 0 || attr->port_num > dev->limits.num_ports)) {
+                mthca_dbg(dev, "Port number (%u) is invalid\n", attr->port_num);
+                return -EINVAL;
+        }
+
         if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
             attr->max_rd_atomic > dev->limits.max_qp_init_rdma) {
                 mthca_dbg(dev, "Max rdma_atomic as initiator %u too large (max is %d)\n",