net/i40e: fix negative VEB index

[ upstream commit 47b6667 ]

This patch adds check for negative VEB index when parsing VEB list.

Fixes: 79f2248 ("net/i40e: add floating VEB option")

Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>

drivers/net/i40e/i40e_ethdev.c

@@ -849,6 +849,8 @@ floating_veb_list_handler(__rte_unused const char *key,
 		idx = strtoul(floating_veb_value, &end, 10);
 		if (errno || end == NULL)
 			return -1;
+		if (idx < 0)
+			return -1;
 		while (isblank(*end))
 			end++;
 		if (*end == '-') {