Patch "IB/uverbs: reject invalid or unknown opcodes" has been added to the 3.10-stable tree

This is a note to let you know that I've just added the patch titled

IB/uverbs: reject invalid or unknown opcodes

to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
ib-uverbs-reject-invalid-or-unknown-opcodes.patch
and it can be found in the queue-3.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Christoph Hellwig <[email protected]>
Date: Wed, 26 Aug 2015 11:00:37 +0200
Subject: IB/uverbs: reject invalid or unknown opcodes

From: Christoph Hellwig <[email protected]>

commit b632ffa7cee439ba5dce3b3bc4a5cbe2b3e20133 upstream.

We have many WR opcodes that are only supported in kernel space and/or require optional information to be copied into the WR structure. Reject all those not explicitly handled so that we can't pass invalid information to drivers.

---
 drivers/infiniband/core/uverbs_cmd.c |   10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

@@ -2106,6 +2106,12 @@ ssize_t ib_uverbs_post_send(struct ib_uv
 		next->send_flags = user_wr->send_flags;
 
 		if (is_ud) {
+			if (next->opcode != IB_WR_SEND &&
+			    next->opcode != IB_WR_SEND_WITH_IMM) {
+				ret = -EINVAL;
+				goto out_put;
+			}
+
 			next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
 						     file->ucontext);
 			if (!next->wr.ud.ah) {

@@ -2142,9 +2148,11 @@ ssize_t ib_uverbs_post_send(struct ib_uv
 					user_wr->wr.atomic.compare_add;
 				next->wr.atomic.swap = user_wr->wr.atomic.swap;
 				next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
+			case IB_WR_SEND:
 				break;
 			default:
-				break;
+				ret = -EINVAL;
+				goto out_put;
 			}
 		}
 

Patches currently in stable-queue which might be from [email protected] are

queue-3.10/ib-uverbs-reject-invalid-or-unknown-opcodes.patch