linux-kernel - [PATCH 4.4 114/138] IB/mlx4: Fix memory leak if QP creation failed

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Date:	Thu, 18 Aug 2016 15:58:44 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Dotan Barak <dotanb@....mellanox.co.il>,
	Jack Morgenstein <jackm@....mellanox.co.il>,
	Leon Romanovsky <leon@...nel.org>,
	Doug Ledford <dledford@...hat.com>
Subject: [PATCH 4.4 114/138] IB/mlx4: Fix memory leak if QP creation failed

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

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

From: Dotan Barak <dotanb@....mellanox.co.il>

commit 5b420d9cf7382c6e1512e96e02d18842d272049c upstream.

When RC, UC, or RAW QPs are created, a qp object is allocated (kzalloc).
If at a later point (in procedure create_qp_common) the qp creation fails,
this qp object must be freed.

Fixes: 1ffeb2eb8be99 ("IB/mlx4: SR-IOV IB context objects and proxy/tunnel SQP support")
Signed-off-by: Dotan Barak <dotanb@....mellanox.co.il>
Signed-off-by: Jack Morgenstein <jackm@....mellanox.co.il>
Signed-off-by: Leon Romanovsky <leon@...nel.org>
Signed-off-by: Doug Ledford <dledford@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/infiniband/hw/mlx4/qp.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -1162,8 +1162,10 @@ struct ib_qp *mlx4_ib_create_qp(struct i
 	{
 		err = create_qp_common(to_mdev(pd->device), pd, init_attr,
 				       udata, 0, &qp, gfp);
-		if (err)
+		if (err) {
+			kfree(qp);
 			return ERR_PTR(err);
+		}
 
 		qp->ibqp.qp_num = qp->mqp.qpn;
 		qp->xrcdn = xrcdn;