netdev - Re: net: heap out-of-bounds in fib6_clean_node/rt6_fill_node/fib6_age/fib6_prune

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Message-ID: <2270c1ca-9481-60c1-9c29-87669223bded@cumulusnetworks.com>
Date:   Mon, 27 Mar 2017 07:57:22 -0600
From:   David Ahern <dsa@...ulusnetworks.com>
To:     Dmitry Vyukov <dvyukov@...gle.com>
Cc:     Eric Dumazet <eric.dumazet@...il.com>,
        Mahesh Bandewar <maheshb@...gle.com>,
        Eric Dumazet <edumazet@...gle.com>,
        David 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>,
        Cong Wang <xiyou.wangcong@...il.com>,
        syzkaller <syzkaller@...glegroups.com>
Subject: Re: net: heap out-of-bounds in
 fib6_clean_node/rt6_fill_node/fib6_age/fib6_prune_clone

On 3/27/17 6:42 AM, Dmitry Vyukov wrote:
> A friendly ping. This still happens all the time for us.

Haven't looked at this in a couple of weeks. I have syzkaller installed
on a machine locally and never was able to reproduce this ipv6 problem.
I am using a jessie rootfs; from the syzkaller files I take it you are
using wheezy. Should not matter but as I recall there are differences in
sysctl setttings. Regardless, can you send me the output of 'sysctl
net.ipv6'?

It is spring break week here, and I am taking a couple of days off. With
netdev next week, I realistically won't have time to come back to this
for 2-3 weeks.