From: Marvin Liu <yong.liu@intel.com>
To: maxime.coquelin@redhat.com, chenbo.xia@intel.com
Cc: dev@dpdk.org, Marvin Liu <yong.liu@intel.com>, stable@dpdk.org
Subject: [dpdk-dev] [PATCH] net/virtio: fix vectorized path receive oversized packets
Date: Sun, 26 Sep 2021 17:28:42 +0800 [thread overview]
Message-ID: <20210926092842.26103-1-yong.liu@intel.com> (raw)
If packed ring size is not power of two, it is possible that remained
number less than one batch and meanwhile batch operation can pass.
This will cause incorrect remained number calculation and then lead to
receiving oversized packets. The patch fixed the issue by added
remained number check before batch operation.
Fixes: 77d66da83834 ("net/virtio: add vectorized packed ring Rx")
Cc: stable@dpdk.org
Signed-off-by: Marvin Liu <yong.liu@intel.com>
diff --git a/drivers/net/virtio/virtio_rxtx_packed.c b/drivers/net/virtio/virtio_rxtx_packed.c
index ab489a58af..45cf39df22 100644
--- a/drivers/net/virtio/virtio_rxtx_packed.c
+++ b/drivers/net/virtio/virtio_rxtx_packed.c
@@ -95,11 +95,13 @@ virtio_recv_pkts_packed_vec(void *rx_queue,
num = num - ((vq->vq_used_cons_idx + num) % PACKED_BATCH_SIZE);
while (num) {
- if (!virtqueue_dequeue_batch_packed_vec(rxvq,
- &rx_pkts[nb_rx])) {
- nb_rx += PACKED_BATCH_SIZE;
- num -= PACKED_BATCH_SIZE;
- continue;
+ if (num >= PACKED_BATCH_SIZE) {
+ if (!virtqueue_dequeue_batch_packed_vec(rxvq,
+ &rx_pkts[nb_rx])) {
+ nb_rx += PACKED_BATCH_SIZE;
+ num -= PACKED_BATCH_SIZE;
+ continue;
+ }
}
if (!virtqueue_dequeue_single_packed_vec(rxvq,
&rx_pkts[nb_rx])) {
--
2.17.1
next reply other threads:[~2021-09-26 2:07 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-26 9:28 Marvin Liu [this message]
2021-10-15 12:20 ` Maxime Coquelin
2021-10-21 12:28 ` Maxime Coquelin
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