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Subject: Re: KASAN: use-after-free Read in rtnetlink_put_metrics
To:     Sabrina Dubroca <sd@queasysnail.net>,
        Cong Wang <xiyou.wangcong@gmail.com>
Cc:     Eric Dumazet <eric.dumazet@gmail.com>,
        syzbot+41f9c04b50ef70c66947@syzkaller.appspotmail.com,
        christian.brauner@ubuntu.com, David Miller <davem@davemloft.net>,
        Florian Westphal <fw@strlen.de>, Jiri Benc <jbenc@redhat.com>,
        Kirill Tkhai <ktkhai@virtuozzo.com>,
        LKML <linux-kernel@vger.kernel.org>,
        lucien xin <lucien.xin@gmail.com>,
        Linux Kernel Network Developers <netdev@vger.kernel.org>,
        syzkaller-bugs@googlegroups.com
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From:   David Ahern <dsahern@gmail.com>
Message-ID: <18196855-1085-9c70-fc58-fdcbe4060d21@gmail.com>
Date:   Wed, 1 Aug 2018 10:28:54 +0200
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On 8/1/18 10:15 AM, Sabrina Dubroca wrote:
> ip -net peerA route add fec0:B::/64 via fec0:A:: mtu 1300

I am on vacation right now with limited access to internet, so not able
to take a look.

In submitting the fib6_info changes I did tests like this and did not
see memleak reports (and verified the metrics refcnts with printks), so
I am surprised to see your patch in this area. Will take a look when I
can but that will not be for a couple more weeks.