Patch "IB/rxe: Prevent from completer to operate on non valid QP" has been added to the 4.9-stable tree

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

IB/rxe: Prevent from completer to operate on non valid QP

to the 4.9-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-rxe-prevent-from-completer-to-operate-on-non-valid-qp.patch
and it can be found in the queue-4.9 subdirectory.

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

From: Yonatan Cohen <[email protected]>
Date: Thu, 19 Jan 2017 15:25:59 +0200
Subject: IB/rxe: Prevent from completer to operate on non valid QP

From: Yonatan Cohen <[email protected]>

commit 2d4b21e0a2913612274a69a3ba1bfee4cffc6e77 upstream.

On UD QP completer tasklet is scheduled for each packet sent.

If it is followed by a destroy_qp(), the kernel panic will happen as the completer tries to operate on a destroyed QP.

---
 drivers/infiniband/sw/rxe/rxe_qp.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

@@ -813,8 +813,7 @@ void rxe_qp_destroy(struct rxe_qp *qp)
 	del_timer_sync(&qp->rnr_nak_timer);
 
 	rxe_cleanup_task(&qp->req.task);
-	if (qp_type(qp) == IB_QPT_RC)
-		rxe_cleanup_task(&qp->comp.task);
+	rxe_cleanup_task(&qp->comp.task);
 
 	/* flush out any receive wr's or pending requests */
 	__rxe_do_task(&qp->req.task);

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

queue-4.9/ib-rxe-prevent-from-completer-to-operate-on-non-valid-qp.patch