[dpdk-dev] [PATCH 3/7] vhost: validate index in guest notification API

[Xia, Chenbo]

> -----Original Message-----
> From: Maxime Coquelin <maxime.coquelin at redhat.com>
> Sent: Tuesday, October 20, 2020 1:34 AM
> To: dev at dpdk.org; Xia, Chenbo <chenbo.xia at intel.com>; amorenoz at redhat.com
> Cc: Maxime Coquelin <maxime.coquelin at redhat.com>; stable at dpdk.org
> Subject: [PATCH 3/7] vhost: validate index in guest notification API
> 
> This patch validates the queue index parameter, in order
> to ensure neither out-of-bound accesses nor NULL pointer
> dereferencing happen.
> 
> Fixes: 9eed6bfd2efb ("vhost: allow to enable or disable features")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Maxime Coquelin <maxime.coquelin at redhat.com>
> ---
>  lib/librte_vhost/vhost.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c
> index 193dafc369..801a1a5098 100644
> --- a/lib/librte_vhost/vhost.c
> +++ b/lib/librte_vhost/vhost.c
> @@ -1352,7 +1352,12 @@ rte_vhost_enable_guest_notification(int vid,
> uint16_t queue_id, int enable)
>  	if (!dev)
>  		return -1;
> 
> +	if (queue_id >= VHOST_MAX_VRING)
> +		return -1;
> +
>  	vq = dev->virtqueue[queue_id];
> +	if (!vq)
> +		return -1;
> 
>  	rte_spinlock_lock(&vq->access_lock);
> 
> --
> 2.26.2

Reviewed-by: Chenbo Xia <chenbo.xia at intel.com>