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Message-ID: <CAM_iQpXjyAAsVSjJfu_c7-eCni7FMNG_MLU_+O6S0yc63JbVVA@mail.gmail.com>
Date:   Mon, 27 Feb 2017 12:34:10 -0800
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Andrey Konovalov <andreyknvl@...gle.com>
Cc:     David Ahern <dsa@...ulusnetworks.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>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Kostya Serebryany <kcc@...gle.com>,
        syzkaller <syzkaller@...glegroups.com>,
        Eric Dumazet <edumazet@...gle.com>
Subject: Re: net/ipv6: null-ptr-deref in ip6_route_del/lock_acquire

On Mon, Feb 27, 2017 at 12:05 PM, Andrey Konovalov
<andreyknvl@...gle.com> wrote:
> On Mon, Feb 27, 2017 at 8:59 PM, David Ahern <dsa@...ulusnetworks.com> wrote:
>> On 2/27/17 10:11 AM, Cong Wang wrote:
>>> The attached patch fixes this crash, but I am not sure if it is the
>>> best way to fix this bug yet...
>>
>> I'll take a look. I can not reproduce this using route or ip, so the
>> fuzzer is doing something interesting.
>
> Hi David,
>
> I've attached a simple reproducer to the report, it doesn't work for you?

It works for me and I have verified the formal patch I sent.

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