[dpdk-dev,v2] net/virtio: fix add pointer checking for rxvq
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Commit Message
For virtio-user server mode, one use case comes across segmentation fault.
step 1: Launch vhost side as client firstly.
step 2: launch virtio-user side as server.
The cause is: after registering virtio_interrupt_handler into
eal-intr-thread, two threads (main thread and eal-intr-thread) have
sync issues, so add rxvq pointer checking in function virtio_notify_peers
to decide if the code can continue.
Fixes: bd8f50a45d0f ("net/virtio-user: support server mode")
Cc: stable@dpdk.org
Cc: maxime.coquelin@redhat.com
Cc: tiwei.bie@intel.com
Cc: lei.a.yao@intel.com
Cc: ferruh.yigit@intel.com
Signed-off-by: Zhiyong Yang <zhiyong.yang@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
Change in V2:
change title prefix from net/virtio-user to net/virtio.
drivers/net/virtio/virtio_ethdev.c | 3 +++
1 file changed, 3 insertions(+)
Comments
On 05/24/2018 05:51 PM, zhiyong.yang@intel.com wrote:
> For virtio-user server mode, one use case comes across segmentation fault.
> step 1: Launch vhost side as client firstly.
> step 2: launch virtio-user side as server.
>
> The cause is: after registering virtio_interrupt_handler into
> eal-intr-thread, two threads (main thread and eal-intr-thread) have
> sync issues, so add rxvq pointer checking in function virtio_notify_peers
> to decide if the code can continue.
>
> Fixes: bd8f50a45d0f ("net/virtio-user: support server mode")
> Cc: stable@dpdk.org
> Cc: maxime.coquelin@redhat.com
> Cc: tiwei.bie@intel.com
> Cc: lei.a.yao@intel.com
> Cc: ferruh.yigit@intel.com
>
> Signed-off-by: Zhiyong Yang <zhiyong.yang@intel.com>
> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> ---
>
> Change in V2:
> change title prefix from net/virtio-user to net/virtio.
>
> drivers/net/virtio/virtio_ethdev.c | 3 +++
> 1 file changed, 3 insertions(+)
Applied to dpdk-next-virtio/master.
Thanks,
Maxime
@@ -1245,6 +1245,9 @@ virtio_notify_peers(struct rte_eth_dev *dev)
return;
rxvq = dev->data->rx_queues[0];
+ if (!rxvq)
+ return;
+
rarp_mbuf = rte_net_make_rarp_packet(rxvq->mpool,
(struct ether_addr *)hw->mac_addr);
if (rarp_mbuf == NULL) {