netdev - Re: [PATCH net] vhost: Fix Spectre V1 vulnerability

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Message-Id: <20181031.123953.2258610601885351617.davem@davemloft.net>
Date:   Wed, 31 Oct 2018 12:39:53 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     jasowang@...hat.com
Cc:     mst@...hat.com, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, jpoimboe@...hat.com,
        aarcange@...hat.com
Subject: Re: [PATCH net] vhost: Fix Spectre V1 vulnerability

From: Jason Wang <jasowang@...hat.com>
Date: Tue, 30 Oct 2018 14:10:49 +0800

> The idx in vhost_vring_ioctl() was controlled by userspace, hence a
> potential exploitation of the Spectre variant 1 vulnerability.
> 
> Fixing this by sanitizing idx before using it to index d->vqs.
> 
> Cc: Michael S. Tsirkin <mst@...hat.com>
> Cc: Josh Poimboeuf <jpoimboe@...hat.com>
> Cc: Andrea Arcangeli <aarcange@...hat.com>
> Signed-off-by: Jason Wang <jasowang@...hat.com>

Applied and queued up for -stable.