Subject: Re: [PATCH stable <= 3.18] net: add length argument to skb_copy_and_csum_datagram_iovec

From: Greg Kroah-Hartman <[email-masked]>
Date: Tue, 10 Nov 2015 16:03:52 -0800

On Tue, Nov 10, 2015 at 05:59:26PM -0600, Josh Hunt wrote:
> On Thu, Oct 29, 2015 at 5:00 AM, Sabrina Dubroca <[email-masked]> wrote:
> > 2015-10-15, 14:25:03 +0200, Sabrina Dubroca wrote:
> >> Without this length argument, we can read past the end of the iovec in
> >> memcpy_toiovec because we have no way of knowing the total length of the
> >> iovec's buffers.
> >>
> >> This is needed for stable kernels where 89c22d8c3b27 ("net: Fix skb
> >> csum races when peeking") has been backported but that don't have the
> >> ioviter conversion, which is almost all the stable trees <= 3.18.
> >>
> >> This also fixes a kernel crash for NFS servers when the client uses
> >>  -onfsvers=3,proto=udp to mount the export.
> >>
> >> Signed-off-by: Sabrina Dubroca <[email-masked]>
> >> Reviewed-by: Hannes Frederic Sowa <[email-masked]>
> >
> > Fixes CVE-2015-8019.
> > http://www.openwall.com/lists/oss-security/2015/10/29/1
> >
> > --
> > Sabrina
> > --
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> 
> Greg
> 
> Do you have this in your queue? I saw a few other stables pick this
> up, but haven't seen it in 3.14 or 3.18 yet. It wasn't clear to me if
> this had been fully reviewed yet.

I rely on Dave to package up networking stable patches and forward them
on to me, that's why you haven't seen it be picked up yet.

thanks,

greg k-h