From b5cca743ec4b464c562c01315d3e2c4d62a29eaa Mon Sep 17 00:00:00 2001
From: Jin liu <jin.liu@corigine.com>
Date: Wed, 10 Nov 2021 10:14:51 +0200
Subject: [PATCH] Add vhost-path safety check when adding a socket pair

If the vhost-path parameter is not passed while adding a socket pair,
return immediately, otherwise this may causes a null pointer access
fault.

Signed-off-by: Jin Liu <jin.liu@corigine.com>
Signed-off-by: Heinrich Kuhn <heinrich.kuhn@corigine.com>
---
 virtio_vhostuser.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/virtio_vhostuser.c b/virtio_vhostuser.c
index 6c0cfa9..50affff 100644
--- a/virtio_vhostuser.c
+++ b/virtio_vhostuser.c
@@ -729,6 +729,11 @@ int virtio_add_sock_dev_pair(const char *vhost_path,
 	dpdk_port_t port_id;
 #endif
 
+	if (!vhost_path) {
+		log_error("vhost-path has to be specified when adding a socket pair");
+		return -1;
+	}
+
 	dev = num_slaves == 1 ? slave_dbdfs[0] : name;
 #if RTE_VERSION >= RTE_VERSION_NUM(16,7,0,0)
 	if (rte_eth_dev_get_port_by_name(dev, &port_id) == 0) {