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Date: Thu, 5 Jul 2018 19:04:13 +0200
From: Greg KH <gregkh@linuxfoundation.org>
To: Luca Boccassi <luca.boccassi@gmail.com>
Cc: stable@vger.kernel.org, davem@davemloft.net,
        yanhaishuang@cmss.chinamobile.com
Subject: Re: stable request: Revert "sit: reload iphdr in ipip6_rcv"
Message-ID: <20180705170413.GE4349@kroah.com>
References: <1530018719.25759.22.camel@gmail.com>
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On Tue, Jun 26, 2018 at 02:11:59PM +0100, Luca Boccassi wrote:
> Hello,
> 
> Please consider backporting to 4.9.y the following commit from DaveM
> [CC'ed]:
> 
> f4eb17e1efe538d4da7d574bedb00a8dafcc26b7  ("Revert "sit: reload iphdr in ipip6_rcv"")
> 
> It cherry-picks cleanly and builds fine.
> 
> The original commit was introduced and reverted in v4.12-rc5, but only
> the original made its way into the 4.9 stable release (v4.9.94).
> 
> It causes a regression: pings to v6 hosts over a SIT tunnel do not work
> anymore, and the following error appears in dmesg:
> 
> kernel: sit: non-ECT from 0.0.0.0 with TOS=0xd
> 
> This was also reported and reverted downstream by Ubuntu:
> 
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1772775

Now applied, thanks.

greg k-h