[PATCH v2 05/44] net/ring: fix segment fault when parse devargs

[Chengwen Feng]

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'.

Fixes: 61934c0956d4 ("ring: convert to use of PMD_REGISTER_DRIVER and fix 
linking")
Fixes: 96cb19521147 ("net/ring: use EAL APIs in PMD specific API")
Cc: sta...@dpdk.org

Signed-off-by: Chengwen Feng <fengcheng...@huawei.com>
---
 drivers/net/ring/rte_eth_ring.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/ring/rte_eth_ring.c b/drivers/net/ring/rte_eth_ring.c
index e8bc9b6271..88b19e205e 100644
--- a/drivers/net/ring/rte_eth_ring.c
+++ b/drivers/net/ring/rte_eth_ring.c
@@ -562,6 +562,9 @@ static int parse_kvlist(const char *key __rte_unused,
        char *node;
        char *end;
 
+       if (value == NULL)
+               return -EINVAL;
+
        name = strdup(value);
 
        ret = -EINVAL;
@@ -630,6 +633,9 @@ parse_internal_args(const char *key __rte_unused, const 
char *value,
        void *args;
        int ret, n;
 
+       if (value == NULL)
+               return -EINVAL;
+
        /* make sure 'value' is valid pointer length */
        if (strnlen(value, ETH_RING_INTERNAL_ARG_MAX_LEN) >=
                        ETH_RING_INTERNAL_ARG_MAX_LEN) {
-- 
2.17.1