From: Maxime Coquelin <maxime.coquelin@redhat.com>
Date: Mon, 19 Oct 2020 17:34:11 +0000 (+0200)
Subject: vhost: validate index in guest notification API
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=366374054b656e049188216e2fa44831749c2a21;p=dpdk.git

vhost: validate index in guest notification API

This patch validates the queue index parameter, in order
to ensure neither out-of-bound accesses nor NULL pointer
dereferencing happen.

Fixes: 9eed6bfd2efb ("vhost: allow to enable or disable features")
Cc: stable@dpdk.org

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>
---

diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c
index 193dafc369..801a1a5098 100644
--- a/lib/librte_vhost/vhost.c
+++ b/lib/librte_vhost/vhost.c
@@ -1352,7 +1352,12 @@ rte_vhost_enable_guest_notification(int vid, uint16_t queue_id, int enable)
 	if (!dev)
 		return -1;
 
+	if (queue_id >= VHOST_MAX_VRING)
+		return -1;
+
 	vq = dev->virtqueue[queue_id];
+	if (!vq)
+		return -1;
 
 	rte_spinlock_lock(&vq->access_lock);