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vhost: fix possible out of bound access in vector filling

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Fixes: 7f74b95c44 ("vhost: pre update used ring for Tx and Rx")
Cc: stable@dpdk.org

Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
This commit is contained in:
Tiwei Bie 2019-01-04 12:06:40 +08:00 committed by Ferruh Yigit
parent 4e282bc6c5
commit 06fc8545fd
1 changed files with 3 additions and 0 deletions
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3
lib/librte_vhost/virtio_net.c
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@ -312,6 +312,9 @@ fill_vec_buf_split(struct virtio_net *dev, struct vhost_virtqueue *vq,
struct vring_desc *descs = vq->desc;
struct vring_desc *idesc = NULL;
if (unlikely(idx >= vq->size))
return -1;
*desc_chain_head = idx;
if (vq->desc[idx].flags & VRING_DESC_F_INDIRECT) {