linux-kernel - Re: [PATCH 4.14 43/43] tipc: pass tunnel dev as NULL to udp_tunnel(6)_xmit

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Date:   Fri, 2 Aug 2019 13:34:27 +0200
From:   "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
To:     "Rantala, Tommi T. (Nokia - FI/Espoo)" <tommi.t.rantala@...ia.com>
Cc:     "lucien.xin@...il.com" <lucien.xin@...il.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "syzbot+a43d8d4e7e8a7a9e149e@...kaller.appspotmail.com" 
        <syzbot+a43d8d4e7e8a7a9e149e@...kaller.appspotmail.com>,
        "syzbot+c4c4b2bb358bb936ad7e@...kaller.appspotmail.com" 
        <syzbot+c4c4b2bb358bb936ad7e@...kaller.appspotmail.com>,
        "syzbot+a47c5f4c6c00fc1ed16e@...kaller.appspotmail.com" 
        <syzbot+a47c5f4c6c00fc1ed16e@...kaller.appspotmail.com>,
        "syzbot+a9e23ea2aa21044c2798@...kaller.appspotmail.com" 
        <syzbot+a9e23ea2aa21044c2798@...kaller.appspotmail.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "syzbot+0290d2290a607e035ba1@...kaller.appspotmail.com" 
        <syzbot+0290d2290a607e035ba1@...kaller.appspotmail.com>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "syzbot+9d4c12bfd45a58738d0a@...kaller.appspotmail.com" 
        <syzbot+9d4c12bfd45a58738d0a@...kaller.appspotmail.com>
Subject: Re: [PATCH 4.14 43/43] tipc: pass tunnel dev as NULL to
 udp_tunnel(6)_xmit_skb

On Fri, Aug 02, 2019 at 11:03:15AM +0000, Rantala, Tommi T. (Nokia - FI/Espoo) wrote:
> On Fri, 2019-08-02 at 09:28 +0200, gregkh@...uxfoundation.org wrote:
> > On Thu, Aug 01, 2019 at 10:17:30AM +0000, Rantala, Tommi T. (Nokia -
> > FI/Espoo) wrote:
> > > Hi,
> > > 
> > > This tipc patch added in 4.14.132 is triggering a crash for me,
> > > revert
> > > fixes it.
> > > 
> > > Anyone have ideas if some other commits missing in 4.14.x to make
> > > this
> > > work...?
> > 
> > Do you also hav a problem with 4.19.y?  How about 5.2.y?  If not, can
> > you do 'git bisect' to find the patch that fixes the issue?
> > 
> > thanks,
> > 
> > greg k-h
> 
> Hi, please pick this to 4.14.y and 4.19.y, tested that it fixes the
> crash in both:
> 
> commit 5684abf7020dfc5f0b6ba1d68eda3663871fce52
> Author: Xin Long <lucien.xin@...il.com>
> Date:   Mon Jun 17 21:34:13 2019 +0800
> 
>     ip_tunnel: allow not to count pkts on tstats by setting skb's dev
> to NULL
> 
> 
> For 5.2.y nothing is needed, these commits were in v5.2-rc6 already.

Thanks for the info, now snuck into the latest round of -rc releases.

greg k-h