netdev - Re: net/ipv6: use-after-free in __call_rcu/in6_dev_finish_destroy

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Message-ID: <d377e00e-4aca-8ee9-9106-4f8912dfb458@cumulusnetworks.com>
Date:   Tue, 2 May 2017 11:22:32 -0600
From:   David Ahern <dsa@...ulusnetworks.com>
To:     Andrey Konovalov <andreyknvl@...gle.com>
Cc:     "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
        "David S. Miller" <davem@...emloft.net>,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        James Morris <jmorris@...ei.org>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        Patrick McHardy <kaber@...sh.net>,
        netdev <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Josh Triplett <josh@...htriplett.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Kostya Serebryany <kcc@...gle.com>,
        syzkaller <syzkaller@...glegroups.com>
Subject: Re: net/ipv6: use-after-free in __call_rcu/in6_dev_finish_destroy_rcu

On 5/2/17 10:58 AM, Andrey Konovalov wrote:
> Do you have a patch that I could test?

not yet.

> 
> I also reported another issue recently, that might also be related to this one:
> https://groups.google.com/forum/#!topic/syzkaller/Rt0pgY4wfiw

different problem. I can still trigger this one with the reproducer you sent