FAILED: patch "[PATCH] RDMA/uverbs: Protect from attempts to create flows on" failed to apply to 4.17-stable tree

The patch below does not apply to the 4.17-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From: Leon Romanovsky <[email protected]>
Date: Sun, 24 Jun 2018 11:23:42 +0300
Subject: [PATCH] RDMA/uverbs: Protect from attempts to create flows on
unsupported QP

Flows can be created on UD and RAW_PACKET QP types. Attempts to provide other QP types as an input causes to various unpredictable failures.

The reason is that in order to support all various types (e.g. XRC), we are supposed to use real_qp handle and not qp handle and expect to driver/FW to fail such (XRC) flows. The simpler and safer variant is to ban all QP types except UD and RAW_PACKET, instead of relying on driver/FW.

index 3e90b6a1d9d2..89c4ce2da78b 100644
@@ -3559,6 +3559,11 @@ int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
 		goto err_uobj;
 	}
 
+	if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) {
+		err = -EINVAL;
+		goto err_put;
+	}
+
 	flow_attr = kzalloc(struct_size(flow_attr, flows,
 				cmd.flow_attr.num_of_specs), GFP_KERNEL);
 	if (!flow_attr) {