[dpdk-dev] [PATCH v2] ethdev: check for invalid device name

[Stephen Hemminger]

Do not allow creating a ethernet device with a name over the
allowed maximum (or zero length). This is safer than silently truncating
which is what happens now.

Signed-off-by: Stephen Hemminger <step...@networkplumber.org>
Acked-by: Andrew Rybchenko <arybche...@solarflare.com>
---
v2 - fix zero length name test

 lib/librte_ethdev/rte_ethdev.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
index 85c1794968dd..b19df3061d54 100644
--- a/lib/librte_ethdev/rte_ethdev.c
+++ b/lib/librte_ethdev/rte_ethdev.c
@@ -438,6 +438,18 @@ rte_eth_dev_allocate(const char *name)
 {
        uint16_t port_id;
        struct rte_eth_dev *eth_dev = NULL;
+       size_t name_len;
+       
+       name_len = strnlen(name, RTE_ETH_NAME_MAX_LEN);
+       if (name_len == 0) {
+               RTE_ETHDEV_LOG(ERR, "Zero length Ethernet device name\n");
+               return NULL;
+       }
+
+       if (name_len >= RTE_ETH_NAME_MAX_LEN) {
+               RTE_ETHDEV_LOG(ERR, "Ethernet device name is too long\n");
+               return NULL;
+       }
 
        rte_eth_dev_shared_data_prepare();
 
-- 
2.17.1