[PATCH 4/9] cryptodev: fix segment fault when parse input args

[Chengwen Feng <fengchengwen@huawei.com>]

The rte_kvargs_process() was used to parse KV pairs, it also supports
to parse 'only keys' (e.g. socket_id) type. And the callback function
parameter 'value' is NULL when parsed 'only keys'.

This patch fixes segment fault when parse input args with 'only keys'
(e.g. socket_id,max_nb_queue_pairs).

Fixes: 9e6edea41805 ("cryptodev: add APIs to assist PMD initialisation")
Cc: stable@dpdk.org

Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
---
 lib/cryptodev/cryptodev_pmd.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/cryptodev/cryptodev_pmd.c b/lib/cryptodev/cryptodev_pmd.c
index 77b269f312..4122000839 100644
--- a/lib/cryptodev/cryptodev_pmd.c
+++ b/lib/cryptodev/cryptodev_pmd.c
@@ -38,6 +38,10 @@ rte_cryptodev_pmd_parse_uint_arg(const char *key __rte_unused,
 {
 	int i;
 	char *end;
+
+	if (value == NULL || extra_args == NULL)
+		return -EINVAL;
+
 	errno = 0;
 
 	i = strtol(value, &end, 10);
-- 
2.17.1