netdev - Re: [PATCH net] vhost: reset metadata cache when initializing new IOTLB

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Date:   Wed, 08 Aug 2018 09:45:21 -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
Subject: Re: [PATCH net] vhost: reset metadata cache when initializing new
 IOTLB

From: Jason Wang <jasowang@...hat.com>
Date: Wed,  8 Aug 2018 11:43:04 +0800

> We need to reset metadata cache during new IOTLB initialization,
> otherwise the stale pointers to previous IOTLB may be still accessed
> which will lead a use after free.
> 
> Reported-by: syzbot+c51e6736a1bf614b3272@...kaller.appspotmail.com
> Fixes: f88949138058 ("vhost: introduce O(1) vq metadata cache")
> Signed-off-by: Jason Wang <jasowang@...hat.com>

Applied and queued up for -stable, thanks Jason.