From: Li Feng <fengli@smartx.com>
Date: Thu, 14 Oct 2021 12:40:08 +0000 (+0800)
Subject: vhost: add sanity check on inflight last index
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=5a4fbe79e6d124141bd0a820c897287b15c559c4;p=dpdk.git

vhost: add sanity check on inflight last index

The index in rte_vhost_set_last_inflight_io_split is from
the frontend driver, check if it's in the virtqueue range.

Fixes: bb0c2de9602b ("vhost: add APIs to operate inflight ring")
Cc: stable@dpdk.org

Signed-off-by: Li Feng <fengli@smartx.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---

diff --git a/lib/vhost/vhost.c b/lib/vhost/vhost.c
index 9540522dac..3b674ac320 100644
--- a/lib/vhost/vhost.c
+++ b/lib/vhost/vhost.c
@@ -1226,6 +1226,9 @@ rte_vhost_set_last_inflight_io_split(int vid, uint16_t vring_idx,
 	if (unlikely(!vq->inflight_split))
 		return -1;
 
+	if (unlikely(idx >= vq->size))
+		return -1;
+
 	vq->inflight_split->last_inflight_io = idx;
 	return 0;
 }