From: Jason Gunthorpe <jgg@mellanox.com>
Date: Tue, 14 Aug 2018 15:33:52 -0600
Subject: IB/mlx5: Fix leaking stack memory to userspace
Patch-mainline: v4.19-rc1
Git-commit: 0625b4ba1a5d4703c7fb01c497bd6c156908af00
References: bsc#1103991 bsc#1143045 FATE#326007 CVE-2018-20855

mlx5_ib_create_qp_resp was never initialized and only the first 4 bytes
were written.

Fixes: 41d902cb7c32 ("RDMA/mlx5: Fix definition of mlx5_ib_create_qp_resp")
Cc: <stable@vger.kernel.org>
Acked-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/hw/mlx5/qp.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -1524,7 +1524,7 @@ static int create_qp_common(struct mlx5_
 	struct mlx5_ib_resources *devr = &dev->devr;
 	int inlen = MLX5_ST_SZ_BYTES(create_qp_in);
 	struct mlx5_core_dev *mdev = dev->mdev;
-	struct mlx5_ib_create_qp_resp resp;
+	struct mlx5_ib_create_qp_resp resp = {};
 	struct mlx5_ib_cq *send_cq;
 	struct mlx5_ib_cq *recv_cq;
 	unsigned long flags;