[dpdk-dev] [PATCH 6/7] vhost: validate index in async API

[Maxime Coquelin]

This patch validates the queue index parameter, in order
to ensure no out-of-bound accesses happen.

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

Signed-off-by: Maxime Coquelin <maxime.coque...@redhat.com>
---
 lib/librte_vhost/vhost.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c
index f78bdfcc94..e92ff618ac 100644
--- a/lib/librte_vhost/vhost.c
+++ b/lib/librte_vhost/vhost.c
@@ -1577,6 +1577,9 @@ int rte_vhost_async_channel_register(int vid, uint16_t 
queue_id,
 
        f.intval = features;
 
+       if (queue_id >= VHOST_MAX_VRING)
+               return -1;
+
        vq = dev->virtqueue[queue_id];
 
        if (unlikely(vq == NULL || !dev->async_copy))
@@ -1658,6 +1661,9 @@ int rte_vhost_async_channel_unregister(int vid, uint16_t 
queue_id)
        if (dev == NULL)
                return ret;
 
+       if (queue_id >= VHOST_MAX_VRING)
+               return ret;
+
        vq = dev->virtqueue[queue_id];
 
        if (vq == NULL)
-- 
2.26.2