[PATCH v2] net/af_xdp: fix memzone leak in error path

[Yunjian Wang <wangyunjian@huawei.com>]

In xdp_umem_configure() allocated memzone for the 'umem', we should
free it when xsk_umem__create() call fails, otherwise it will lead to
memory zone leak. To fix it move 'umem->mz = mz;' assignment after
'mz == NULL' check.

Fixes: f1debd77efaf ("net/af_xdp: introduce AF_XDP PMD")
Cc: stable@dpdk.org

Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
---
v2: update code suggested by Ferruh Yigit
---
 drivers/net/af_xdp/rte_eth_af_xdp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/af_xdp/rte_eth_af_xdp.c b/drivers/net/af_xdp/rte_eth_af_xdp.c
index 353c8688ec..9f0f751d4a 100644
--- a/drivers/net/af_xdp/rte_eth_af_xdp.c
+++ b/drivers/net/af_xdp/rte_eth_af_xdp.c
@@ -1235,6 +1235,7 @@ xsk_umem_info *xdp_umem_configure(struct pmd_internals *internals,
 		goto err;
 	}
 
+	umem->mz = mz;
 	ret = xsk_umem__create(&umem->umem, mz->addr,
 			       ETH_AF_XDP_NUM_BUFFERS * ETH_AF_XDP_FRAME_SIZE,
 			       &rxq->fq, &rxq->cq,
@@ -1244,7 +1245,6 @@ xsk_umem_info *xdp_umem_configure(struct pmd_internals *internals,
 		AF_XDP_LOG(ERR, "Failed to create umem\n");
 		goto err;
 	}
-	umem->mz = mz;
 
 	return umem;
 
-- 
2.33.0