[dpdk-dev] [PATCH] ethdev: add a check on mempool during rxq setup

[David Marchand <david.marchand@redhat.com>]

We currently have no check on the mempool pointer passed to
rte_eth_rx_queue_setup.
Let's avoid a plain crash when dereferencing it.

Suggested-by: Jens Freimann <jfreimann@redhat.com>
Signed-off-by: David Marchand <david.marchand@redhat.com>
---
 lib/librte_ethdev/rte_ethdev.c | 5 +++++
 lib/librte_ethdev/rte_ethdev.h | 6 +++---
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
index d7cfa3d..76453fe 100644
--- a/lib/librte_ethdev/rte_ethdev.c
+++ b/lib/librte_ethdev/rte_ethdev.c
@@ -1579,6 +1579,11 @@ struct rte_eth_dev *
 		return -EINVAL;
 	}
 
+	if (mp == NULL) {
+		RTE_ETHDEV_LOG(ERR, "Invalid null mempool pointer\n");
+		return -EINVAL;
+	}
+
 	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_infos_get, -ENOTSUP);
 	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->rx_queue_setup, -ENOTSUP);
 
diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h
index 80e371b..d7b2657 100644
--- a/lib/librte_ethdev/rte_ethdev.h
+++ b/lib/librte_ethdev/rte_ethdev.h
@@ -1745,9 +1745,9 @@ int rte_eth_dev_configure(uint16_t port_id, uint16_t nb_rx_queue,
  * @return
  *   - 0: Success, receive queue correctly set up.
  *   - -EIO: if device is removed.
- *   - -EINVAL: The size of network buffers which can be allocated from the
- *      memory pool does not fit the various buffer sizes allowed by the
- *      device controller.
+ *   - -EINVAL: The memory pool pointer is null or the size of network buffers
+ *      which can be allocated from this memory pool does not fit the various
+ *      buffer sizes allowed by the device controller.
  *   - -ENOMEM: Unable to allocate the receive ring descriptors or to
  *      allocate network memory buffers from the memory pool when
  *      initializing receive descriptors.
-- 
1.8.3.1