1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 16d55710b116..d0202bb176a4 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -1971,6 +1971,12 @@ static int modify_qp(struct ib_uverbs_file *file,
                 goto release_qp;
         }
 
+        if ((cmd->base.attr_mask & IB_QP_ALT_PATH) &&
+            !rdma_is_port_valid(qp->device, cmd->base.alt_port_num)) {
+                ret = -EINVAL;
+                goto release_qp;
+        }
+
         attr->qp_state            = cmd->base.qp_state;
         attr->cur_qp_state        = cmd->base.cur_qp_state;
         attr->path_mtu            = cmd->base.path_mtu;