Similar as single dequeue, the multiple accesses of descriptor length
will lead to potential risk. One-time access of descriptor length can
eliminate this risk.
Fixes: 75ed51697820 ("vhost: add packed ring batch dequeue")
Cc: sta...@dpdk.org
Signed-off-by: Marvin Liu <yong....@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coque...@redhat.com>
diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c
index de43686522..0a7d008a91 100644
--- a/lib/librte_vhost/virtio_net.c
+++ b/lib/librte_vhost/virtio_net.c
@@ -2318,7 +2318,7 @@ vhost_reserve_avail_batch_packed(struct virtio_net *dev,
}
vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE) {
- pkts[i]->pkt_len = descs[avail_idx + i].len - buf_offset;
+ pkts[i]->pkt_len = lens[i] - buf_offset;
pkts[i]->data_len = pkts[i]->pkt_len;
ids[i] = descs[avail_idx + i].id;
}
--
2.17.1
