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From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: dev@dpdk.org, chenbo.xia@intel.com, amorenoz@redhat.com
Cc: Maxime Coquelin <maxime.coquelin@redhat.com>, stable@dpdk.org
Subject: [dpdk-dev] [PATCH 5/7] vhost: validate index in inflight API
Date: Mon, 19 Oct 2020 19:34:13 +0200
Message-ID: <20201019173415.582407-6-maxime.coquelin@redhat.com> (raw)
In-Reply-To: <20201019173415.582407-1-maxime.coquelin@redhat.com>

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

Fixes: 4d891f77ddfa ("vhost: add APIs to get inflight ring")
Cc: stable@dpdk.org

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
 lib/librte_vhost/vhost.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c
index b9afe46ca2..f78bdfcc94 100644
--- a/lib/librte_vhost/vhost.c
+++ b/lib/librte_vhost/vhost.c
@@ -1523,15 +1523,23 @@ rte_vhost_get_vring_base_from_inflight(int vid,
 				       uint16_t *last_used_idx)
 {
 	struct rte_vhost_inflight_info_packed *inflight_info;
+	struct vhost_virtqueue *vq;
 	struct virtio_net *dev = get_device(vid);
 
 	if (dev == NULL || last_avail_idx == NULL || last_used_idx == NULL)
 		return -1;
 
+	if (queue_id >= VHOST_MAX_VRING)
+		return -1;
+
+	vq = dev->virtqueue[queue_id];
+	if (!vq)
+		return -1;
+
 	if (!vq_is_packed(dev))
 		return -1;
 
-	inflight_info = dev->virtqueue[queue_id]->inflight_packed;
+	inflight_info = vq->inflight_packed;
 	if (!inflight_info)
 		return -1;
 
-- 
2.26.2


  parent reply	other threads:[~2020-10-19 17:36 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-19 17:34 [dpdk-dev] [PATCH 0/7] vhost: make VQ metadata dereferencing robust Maxime Coquelin
2020-10-19 17:34 ` [dpdk-dev] [PATCH 1/7] vhost: fix virtqueues metadata allocation Maxime Coquelin
2020-10-21 11:10   ` Xia, Chenbo
2020-10-21 12:06     ` Maxime Coquelin
2020-10-22 11:00       ` Xia, Chenbo
2020-10-19 17:34 ` [dpdk-dev] [PATCH 2/7] vhost: validate index in available entries API Maxime Coquelin
2020-10-21 11:28   ` Xia, Chenbo
2020-10-19 17:34 ` [dpdk-dev] [PATCH 3/7] vhost: validate index in guest notification API Maxime Coquelin
2020-10-21 11:30   ` Xia, Chenbo
2020-10-19 17:34 ` [dpdk-dev] [PATCH 4/7] vhost: validate index in live-migration API Maxime Coquelin
2020-10-21 11:30   ` Xia, Chenbo
2020-10-19 17:34 ` Maxime Coquelin [this message]
2020-10-21 11:30   ` [dpdk-dev] [PATCH 5/7] vhost: validate index in inflight API Xia, Chenbo
2020-10-19 17:34 ` [dpdk-dev] [PATCH 6/7] vhost: validate index in async API Maxime Coquelin
2020-10-21 11:31   ` Xia, Chenbo
2020-10-19 17:34 ` [dpdk-dev] [PATCH 7/7] vhost: check virtqueue metadata pointer Maxime Coquelin
2020-10-21 11:32   ` Xia, Chenbo
2020-10-23 11:21 ` [dpdk-dev] [PATCH 0/7] vhost: make VQ metadata dereferencing robust Maxime Coquelin

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