From: Stefano Garzarella <sgarzare@redhat.com>
To: Neeraj Upadhyay <neeraju@codeaurora.org>
Cc: mst@redhat.com, jasowang@redhat.com,
virtualization@lists.linux-foundation.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] vringh: Use wiov->used to check for read/write desc order
Date: Wed, 23 Jun 2021 18:10:13 +0200 [thread overview]
Message-ID: <20210623161013.qg3azanyxt7nucgl@steredhat> (raw)
In-Reply-To: <1624361873-6097-1-git-send-email-neeraju@codeaurora.org>
On Tue, Jun 22, 2021 at 05:07:53PM +0530, Neeraj Upadhyay wrote:
>As iov->used is incremented when descriptors are processed
>in __vringh_iov(), use it to check for incorrect read
>and write descriptor order.
>
>Signed-off-by: Neeraj Upadhyay <neeraju@codeaurora.org>
>---
> drivers/vhost/vringh.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
>
>diff --git a/drivers/vhost/vringh.c b/drivers/vhost/vringh.c
>index 4af8fa2..14e2043 100644
>--- a/drivers/vhost/vringh.c
>+++ b/drivers/vhost/vringh.c
>@@ -359,7 +359,7 @@ __vringh_iov(struct vringh *vrh, u16 i,
> iov = wiov;
> else {
> iov = riov;
>- if (unlikely(wiov && wiov->i)) {
>+ if (unlikely(wiov && wiov->used)) {
> vringh_bad("Readable desc %p after writable",
> &descs[i]);
> err = -EINVAL;
>--
>QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
>hosted by The Linux Foundation
>
next prev parent reply other threads:[~2021-06-23 16:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-22 11:37 [PATCH] vringh: Use wiov->used to check for read/write desc order Neeraj Upadhyay
2021-06-23 3:21 ` Jason Wang
2021-06-23 16:10 ` Stefano Garzarella [this message]
2021-06-23 20:09 ` Michael S. Tsirkin
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