linux-kernel - [PATCH 4.14 047/115] RDMA/vmw_pvrdma: Call ib_umem

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Date:   Fri,  2 Mar 2018 09:50:50 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Adit Ranadive <aditr@...are.com>,
        Aditya Sarwade <asarwade@...are.com>,
        Jorgen Hansen <jhansen@...are.com>,
        Bryan Tan <bryantan@...are.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.14 047/115] RDMA/vmw_pvrdma: Call ib_umem_release on destroy QP path

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Bryan Tan <bryantan@...are.com>


[ Upstream commit 17748056ce123ee37fb7382bc698fc721e3c4a09 ]

The QP cleanup did not previously call ib_umem_release,
resulting in a user-triggerable kernel resource leak.

Fixes: 29c8d9eba550 ("IB: Add vmw_pvrdma driver")
Reviewed-by: Adit Ranadive <aditr@...are.com>
Reviewed-by: Aditya Sarwade <asarwade@...are.com>
Reviewed-by: Jorgen Hansen <jhansen@...are.com>
Signed-off-by: Bryan Tan <bryantan@...are.com>
Signed-off-by: Jason Gunthorpe <jgg@...lanox.com>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/infiniband/hw/vmw_pvrdma/pvrdma_qp.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_qp.c
+++ b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_qp.c
@@ -406,6 +406,13 @@ static void pvrdma_free_qp(struct pvrdma
 	atomic_dec(&qp->refcnt);
 	wait_event(qp->wait, !atomic_read(&qp->refcnt));
 
+	if (!qp->is_kernel) {
+		if (qp->rumem)
+			ib_umem_release(qp->rumem);
+		if (qp->sumem)
+			ib_umem_release(qp->sumem);
+	}
+
 	pvrdma_page_dir_cleanup(dev, &qp->pdir);
 
 	kfree(qp);