patches for DPDK stable branches
 help / color / mirror / Atom feed
From: Yuanhan Liu <yliu@fridaylinux.org>
To: Daniel Mrzyglod <danielx.t.mrzyglod@intel.com>
Cc: dev@dpdk.org, jianfeng.tan@intel.com, stable@dpdk.org
Subject: Re: [dpdk-stable] [PATCH v3] net/virtio: fix of untrusted scalar value
Date: Wed, 27 Sep 2017 17:25:17 +0800	[thread overview]
Message-ID: <20170927092517.GI2251@yliu-home> (raw)
In-Reply-To: <20170922152149.16876-1-danielx.t.mrzyglod@intel.com>

On Fri, Sep 22, 2017 at 05:21:49PM +0200, Daniel Mrzyglod wrote:
> The unscrutinized value may be incorrectly assumed to be within a certain
> range by later operations.
> 
> In vhost_user_read: An unscrutinized value from an untrusted source used
> in a trusted context - the value of sz_payload may be harmfull and we need
> limit them to the max value of payload.
> 
> Coverity issue: 139601
> 
> Fixes: 6a84c37e3975 ("net/virtio-user: add vhost-user adapter layer")
> Cc: jianfeng.tan@intel.com
> Cc: stable@dpdk.org
> 
> Signed-off-by: Daniel Mrzyglod <danielx.t.mrzyglod@intel.com>

FYI, you should put the Ack from Jianfeng here, so that it will be
there when I apply your patch. Otherwise, I have to add it back manually.

But never mind, I have done it this time. So, applied to dpdk-next-virtio.

Thanks.

	--yliu

> ---
> v3:
> * there were wrong v2 email adress for stable dpdk mailinglist
> * fix compilation errors
> 
> v2:
> * Add Cc for stable in gitlog massage
> * Add Coverity line
> * v1 was acked by Acked-by: Jianfeng Tan <jianfeng.tan@intel.com>
> 
> 
>  drivers/net/virtio/virtio_user/vhost_user.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/net/virtio/virtio_user/vhost_user.c b/drivers/net/virtio/virtio_user/vhost_user.c
> index 4ad7b21..97bd832 100644
> --- a/drivers/net/virtio/virtio_user/vhost_user.c
> +++ b/drivers/net/virtio/virtio_user/vhost_user.c
> @@ -130,6 +130,10 @@ vhost_user_read(int fd, struct vhost_user_msg *msg)
>  	}
>  
>  	sz_payload = msg->size;
> +
> +	if ((size_t)sz_payload > sizeof(msg->payload))
> +		goto fail;
> +
>  	if (sz_payload) {
>  		ret = recv(fd, (void *)((char *)msg + sz_hdr), sz_payload, 0);
>  		if (ret < sz_payload) {
> -- 
> 2.7.4

      reply	other threads:[~2017-09-27  9:25 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20170920091917.3929-1-danielx.t.mrzyglod@intel.com>
2017-09-20 13:25 ` [dpdk-stable] [PATCH v2] " Daniel Mrzyglod
2017-09-22 15:21   ` [dpdk-stable] [PATCH v3] " Daniel Mrzyglod
2017-09-27  9:25     ` Yuanhan Liu [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20170927092517.GI2251@yliu-home \
    --to=yliu@fridaylinux.org \
    --cc=danielx.t.mrzyglod@intel.com \
    --cc=dev@dpdk.org \
    --cc=jianfeng.tan@intel.com \
    --cc=stable@dpdk.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).