net/mlx5: check memory allocation in flow creation

[ upstream commit 3f22e31 ]

rte_calloc functions returns a non-null pointer in case of
success and null pointer in case of failure.

The return value should be checked and the function flow
should take that into consideration.

This patch adds a check for rte_calloc return value in function
flow_list_create.

Fixes: 84c406e ("net/mlx5: add flow translate function")

Signed-off-by: Asaf Penso <asafp@mellanox.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>

drivers/net/mlx5/mlx5_flow.c

@@ -2069,6 +2069,10 @@ flow_list_create(struct rte_eth_dev *dev, struct mlx5_flows *list,
 	else
 		flow_size += RTE_ALIGN_CEIL(sizeof(uint16_t), sizeof(void *));
 	flow = rte_calloc(__func__, 1, flow_size, 0);
+	if (!flow) {
+		rte_errno = ENOMEM;
+		return NULL;
+	}
 	flow->drv_type = flow_get_drv_type(dev, attr);
 	assert(flow->drv_type > MLX5_FLOW_TYPE_MIN &&
 	       flow->drv_type < MLX5_FLOW_TYPE_MAX);