From: Tiwei Bie <tiwei.bie@intel.com>
Date: Fri, 22 Jun 2018 03:53:05 +0000 (+0800)
Subject: vhost: fix potential null pointer dereference
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=ad0fdb696a96311629e14f43db39250a92f02e7d;p=dpdk.git

vhost: fix potential null pointer dereference

Coverity issue: 293097
Fixes: d90cf7d111ac ("vhost: support host notifier")

Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---

diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 26cfebec07..bea6a0428a 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1830,6 +1830,8 @@ int vhost_user_host_notifier_ctrl(int vid, bool enable)
 		return -ENOTSUP;
 
 	vdpa_dev = rte_vdpa_get_device(did);
+	if (!vdpa_dev)
+		return -ENODEV;
 
 	RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_vfio_device_fd, -ENOTSUP);
 	RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_notify_area, -ENOTSUP);