patches for DPDK stable branches
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From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: Marvin Liu <yong.liu@intel.com>, chenbo.xia@intel.com
Cc: dev@dpdk.org, stable@dpdk.org
Subject: Re: [dpdk-stable] [PATCH] vhost: fix accessing uninitialized variables
Date: Wed, 24 Mar 2021 10:54:38 +0100
Message-ID: <9a853981-06f8-4ab4-f6a8-322ae8629a4b@redhat.com> (raw)
In-Reply-To: <20210303072755.82979-1-yong.liu@intel.com>



On 3/3/21 8:27 AM, Marvin Liu wrote:
> This patch fixs coverity issue by adding initialization step before
> using temporary virtio header.
> 
> Coverity issue: 366181, 366123
> Fixes: fb3815cc614d ("vhost: handle virtually non-contiguous buffers in Rx-mrg")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Marvin Liu <yong.liu@intel.com>
> 
> diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c
> index 583bf379c6..fe464b3088 100644
> --- a/lib/librte_vhost/virtio_net.c
> +++ b/lib/librte_vhost/virtio_net.c
> @@ -808,9 +808,10 @@ copy_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq,
>  
>  	hdr_mbuf = m;
>  	hdr_addr = buf_addr;
> -	if (unlikely(buf_len < dev->vhost_hlen))
> +	if (unlikely(buf_len < dev->vhost_hlen)) {
> +		memset(&tmp_hdr, 0, sizeof(struct virtio_net_hdr_mrg_rxbuf));
>  		hdr = &tmp_hdr;
> -	else
> +	} else
>  		hdr = (struct virtio_net_hdr_mrg_rxbuf *)(uintptr_t)hdr_addr;
>  
>  	VHOST_LOG_DATA(DEBUG, "(%d) RX: num merge buffers %d\n",
> 

Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

Thanks,
Maxime


  reply	other threads:[~2021-03-24  9:54 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-03  7:27 Marvin Liu
2021-03-24  9:54 ` Maxime Coquelin [this message]
2021-03-27 10:06   ` [dpdk-stable] [dpdk-dev] " wangyunjian
2021-03-29  1:44     ` Liu, Yong
2021-04-06  6:17 ` [dpdk-stable] " Xia, Chenbo
2021-04-07  2:48   ` Liu, Yong

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