Re: [PATCH net] vhost/net: fix heads usage of ubuf_info
From: David Miller
Date: Sun Mar 17 2013 - 14:30:05 EST
From: "Michael S. Tsirkin" <mst@xxxxxxxxxx>
Date: Sun, 17 Mar 2013 14:46:09 +0200
> ubuf info allocator uses guest controlled head as an index,
> so a malicious guest could put the same head entry in the ring twice,
> and we will get two callbacks on the same value.
> To fix use upend_idx which is guaranteed to be unique.
> Reported-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
> Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
Applied and queued up for -stable, thanks.
And thankfully you got the stable URL wrong, please do not CC:
networking patches to stable, just make sure I apply them and in
your post-commit text explicitly ask me to queue it up to my
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