IB: Ensure that all rdma_ah_attr's are zero initialized

Since we are adding some new fields to this structure it is safest if all
users reliably initialize the struct to zero.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>

drivers/infiniband/core/uverbs_cmd.c

@@ -1968,7 +1968,7 @@ static int modify_qp(struct ib_uverbs_file *file,
 	struct ib_qp *qp;
 	int ret;
 
-	attr = kmalloc(sizeof *attr, GFP_KERNEL);
+	attr = kzalloc(sizeof(*attr), GFP_KERNEL);
 	if (!attr)
 		return -ENOMEM;
 
@@ -2552,7 +2552,7 @@ ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
 	struct ib_uobject		*uobj;
 	struct ib_pd			*pd;
 	struct ib_ah			*ah;
-	struct rdma_ah_attr		attr;
+	struct rdma_ah_attr		attr = {};
 	int ret;
 	struct ib_udata                   udata;