Patch "IB/uverbs: Fix leak of XRC target QPs" has been added to the 4.8-stable tree

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

IB/uverbs: Fix leak of XRC target QPs

to the 4.8-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-fix-leak-of-xrc-target-qps.patch
and it can be found in the queue-4.8 subdirectory.

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

From: Tariq Toukan <[email protected]>
Date: Thu, 27 Oct 2016 16:36:26 +0300
Subject: IB/uverbs: Fix leak of XRC target QPs

From: Tariq Toukan <[email protected]>

commit 5b810a242c28e1d8d64d718cebe75b79d86a0b2d upstream.

The real QP is destroyed in case of the ref count reaches zero, but for XRC target QPs this call was missed and caused to QP leaks.

Let's call to destroy for all flows.

---
 drivers/infiniband/core/uverbs_main.c |    7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

@@ -262,12 +262,9 @@ static int ib_uverbs_cleanup_ucontext(st
 			container_of(uobj, struct ib_uqp_object, uevent.uobject);
 
 		idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
-		if (qp != qp->real_qp) {
-			ib_close_qp(qp);
-		} else {
+		if (qp == qp->real_qp)
 			ib_uverbs_detach_umcast(qp, uqp);
-			ib_destroy_qp(qp);
-		}
+		ib_destroy_qp(qp);
 		ib_uverbs_release_uevent(file, &uqp->uevent);
 		kfree(uqp);
 	}

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

queue-4.8/ib-uverbs-fix-leak-of-xrc-target-qps.patch