net/cnxk: fix possible null dereference in telemetry

The return value of rte_tel_data_alloc() may be null pointer.
Add missing check vs null.

Fixes: 5ea354a1f2cc ("net/cnxk: support telemetry")
Cc: stable@dpdk.org
Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
Acked-by: Morten Brørup <mb@smartsharesystems.com>
Reviewed-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>

diff --git a/drivers/net/cnxk/cnxk_ethdev_telemetry.c b/drivers/net/cnxk/cnxk_ethdev_telemetry.c
index b76dbdfef92c1c94da9af18cef1e4a5a10648c66..180108ab9c94309634e926aedbcff9865453c8a7 100644 (file)
--- a/drivers/net/cnxk/cnxk_ethdev_telemetry.c
+++ b/drivers/net/cnxk/cnxk_ethdev_telemetry.c
@@ -50,6 +50,8 @@ ethdev_tel_handle_info(const char *cmd __rte_unused,
        rte_tel_data_add_dict_int(d, "n_ports", n_ports);
 
        i_data = rte_tel_data_alloc();
+       if (i_data == NULL)
+               return -ENOMEM;
        rte_tel_data_start_array(i_data, RTE_TEL_U64_VAL);
 
        for (i = 0; i < RTE_MAX_ETHPORTS; i++) {