From mboxrd@z Thu Jan  1 00:00:00 1970
From: Florian Westphal <fw@strlen.de>
Subject: Re: linux 3.4.43 : kernel crash at __nf_conntrack_confirm
Date: Wed, 21 Oct 2015 23:19:11 +0200
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Cc: Florian Westphal <fw@strlen.de>, Patrick McHardy <kaber@trash.net>,
	"David S. Miller" <davem@davemloft.net>,
	netfilter-devel@vger.kernel.org, netfilter@vger.kernel.org,
	coreteam@netfilter.org,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>
To: Ani Sinha <ani@arista.com>
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Ani Sinha <ani@arista.com> wrote:
> >> > commit c6825c0976fa7893692e0e43b09740b419b23c09
> >> > Author: Andrey Vagin <avagin@openvz.org>
> >> > Date:   Wed Jan 29 19:34:14 2014 +0100
> >> >      netfilter: nf_conntrack: fix RCU race in nf_conntrack_find_get
> >> >
> >> > and a followup patch :
> >> >
> >> > commit e53376bef2cd97d3e3f61fdc677fb8da7d03d0da
> >> > Author: Pablo Neira Ayuso <pablo@netfilter.org>
> >> > Date:   Mon Feb 3 20:01:53 2014 +0100
> >> >         netfilter: nf_conntrack: don't release a conntrack with non-zero refcnt
> >> >
> >
> > These for instance fix such bugs.
> 
> So since both these patches were not backported to 3.4 series and
> since now we have evidence of a crash that points to issues which the
> patches fix, should we consider backporting the above patches to 3.4?

Yes.