* [dpdk-dev] [PATCH] net/virtio: fix incorrect cast of void *
@ 2017-12-14 14:33 Olivier Matz
2017-12-14 14:49 ` Maxime Coquelin
0 siblings, 1 reply; 3+ messages in thread
From: Olivier Matz @ 2017-12-14 14:33 UTC (permalink / raw)
To: dev, Yuanhan Liu, Maxime Coquelin; +Cc: Didier Pallard, stable
From: Didier Pallard <didier.pallard@6wind.com>
The rx_queues and tx_queues fields of the data structure points to a struct
virtnet_rx or virtnet_tx. Casting it to a virtqueue is an error.
It does not trigger any bug because pointer is not dereferenced inside the
function, but it can become a bug if this code is copy/pasted and vq is
dereferenced.
Fixes: 01ad44fd374f ("net/virtio: split Rx/Tx queue")
Cc: stable@dpdk.org
Signed-off-by: Didier Pallard <didier.pallard@6wind.com>
Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
---
drivers/net/virtio/virtio_ethdev.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index c0ba83b06..b398f9960 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -893,7 +893,7 @@ static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
/* Note: limit checked in rte_eth_xstats_names() */
for (i = 0; i < dev->data->nb_rx_queues; i++) {
- struct virtqueue *rxvq = dev->data->rx_queues[i];
+ struct virtnet_rx *rxvq = dev->data->rx_queues[i];
if (rxvq == NULL)
continue;
for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
@@ -906,7 +906,7 @@ static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
}
for (i = 0; i < dev->data->nb_tx_queues; i++) {
- struct virtqueue *txvq = dev->data->tx_queues[i];
+ struct virtnet_tx *txvq = dev->data->tx_queues[i];
if (txvq == NULL)
continue;
for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
--
2.11.0
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [dpdk-dev] [PATCH] net/virtio: fix incorrect cast of void *
2017-12-14 14:33 [dpdk-dev] [PATCH] net/virtio: fix incorrect cast of void * Olivier Matz
@ 2017-12-14 14:49 ` Maxime Coquelin
2017-12-27 14:38 ` Yuanhan Liu
0 siblings, 1 reply; 3+ messages in thread
From: Maxime Coquelin @ 2017-12-14 14:49 UTC (permalink / raw)
To: Olivier Matz, dev, Yuanhan Liu; +Cc: Didier Pallard, stable
On 12/14/2017 03:33 PM, Olivier Matz wrote:
> From: Didier Pallard <didier.pallard@6wind.com>
>
> The rx_queues and tx_queues fields of the data structure points to a struct
> virtnet_rx or virtnet_tx. Casting it to a virtqueue is an error.
>
> It does not trigger any bug because pointer is not dereferenced inside the
> function, but it can become a bug if this code is copy/pasted and vq is
> dereferenced.
>
> Fixes: 01ad44fd374f ("net/virtio: split Rx/Tx queue")
> Cc: stable@dpdk.org
>
> Signed-off-by: Didier Pallard <didier.pallard@6wind.com>
> Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
> ---
> drivers/net/virtio/virtio_ethdev.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
> index c0ba83b06..b398f9960 100644
> --- a/drivers/net/virtio/virtio_ethdev.c
> +++ b/drivers/net/virtio/virtio_ethdev.c
> @@ -893,7 +893,7 @@ static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
> /* Note: limit checked in rte_eth_xstats_names() */
>
> for (i = 0; i < dev->data->nb_rx_queues; i++) {
> - struct virtqueue *rxvq = dev->data->rx_queues[i];
> + struct virtnet_rx *rxvq = dev->data->rx_queues[i];
> if (rxvq == NULL)
> continue;
> for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
> @@ -906,7 +906,7 @@ static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
> }
>
> for (i = 0; i < dev->data->nb_tx_queues; i++) {
> - struct virtqueue *txvq = dev->data->tx_queues[i];
> + struct virtnet_tx *txvq = dev->data->tx_queues[i];
> if (txvq == NULL)
> continue;
> for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Thanks,
Maxime
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [dpdk-dev] [PATCH] net/virtio: fix incorrect cast of void *
2017-12-14 14:49 ` Maxime Coquelin
@ 2017-12-27 14:38 ` Yuanhan Liu
0 siblings, 0 replies; 3+ messages in thread
From: Yuanhan Liu @ 2017-12-27 14:38 UTC (permalink / raw)
To: Maxime Coquelin; +Cc: Olivier Matz, dev, Didier Pallard, stable
On Thu, Dec 14, 2017 at 03:49:32PM +0100, Maxime Coquelin wrote:
>
>
> On 12/14/2017 03:33 PM, Olivier Matz wrote:
> >From: Didier Pallard <didier.pallard@6wind.com>
> >
> >The rx_queues and tx_queues fields of the data structure points to a struct
> >virtnet_rx or virtnet_tx. Casting it to a virtqueue is an error.
> >
> >It does not trigger any bug because pointer is not dereferenced inside the
> >function, but it can become a bug if this code is copy/pasted and vq is
> >dereferenced.
> >
> >Fixes: 01ad44fd374f ("net/virtio: split Rx/Tx queue")
> >Cc: stable@dpdk.org
> >
> >Signed-off-by: Didier Pallard <didier.pallard@6wind.com>
> >Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
> >---
> > drivers/net/virtio/virtio_ethdev.c | 4 ++--
> > 1 file changed, 2 insertions(+), 2 deletions(-)
> >
> >diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
> >index c0ba83b06..b398f9960 100644
> >--- a/drivers/net/virtio/virtio_ethdev.c
> >+++ b/drivers/net/virtio/virtio_ethdev.c
> >@@ -893,7 +893,7 @@ static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
> > /* Note: limit checked in rte_eth_xstats_names() */
> > for (i = 0; i < dev->data->nb_rx_queues; i++) {
> >- struct virtqueue *rxvq = dev->data->rx_queues[i];
> >+ struct virtnet_rx *rxvq = dev->data->rx_queues[i];
> > if (rxvq == NULL)
> > continue;
> > for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
> >@@ -906,7 +906,7 @@ static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
> > }
> > for (i = 0; i < dev->data->nb_tx_queues; i++) {
> >- struct virtqueue *txvq = dev->data->tx_queues[i];
> >+ struct virtnet_tx *txvq = dev->data->tx_queues[i];
> > if (txvq == NULL)
> > continue;
> > for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
> >
>
> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Applied to dpdk-next-virtio.
Thanks.
--yliu
^ permalink raw reply [flat|nested] 3+ messages in thread
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2017-12-14 14:33 [dpdk-dev] [PATCH] net/virtio: fix incorrect cast of void * Olivier Matz
2017-12-14 14:49 ` Maxime Coquelin
2017-12-27 14:38 ` Yuanhan Liu
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