vhost: fix possible out of bound access

Fixes: d7280c9fffcb ("vhost: support selective datapath")
Cc: stable@dpdk.org
Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

diff --git a/lib/librte_vhost/vdpa.c b/lib/librte_vhost/vdpa.c
index c2c5dff..e7d849e 100644 (file)
--- a/lib/librte_vhost/vdpa.c
+++ b/lib/librte_vhost/vdpa.c
@@ -63,6 +63,9 @@ rte_vdpa_register_device(struct rte_vdpa_dev_addr *addr,
                        break;
        }
 
+       if (i == MAX_VHOST_DEVICE)
+               return -1;
+
        sprintf(device_name, "vdpa-dev-%d", i);
        dev = rte_zmalloc(device_name, sizeof(struct rte_vdpa_device),
                        RTE_CACHE_LINE_SIZE);