netdev - Re: general protection fault in dccp_timeout_nlattr_to

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Message-ID: <000000000000d04359059b82afd9@google.com>
Date:   Mon, 06 Jan 2020 17:28:01 -0800
From:   syzbot <syzbot+46a4ad33f345d1dd346e@...kaller.appspotmail.com>
To:     coreteam@...filter.org, davem@...emloft.net, fw@...len.de,
        kadlec@...ckhole.kfki.hu, kadlec@...filter.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        netfilter-devel@...r.kernel.org, pablo@...filter.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: general protection fault in dccp_timeout_nlattr_to_obj

syzbot has bisected this bug to:

commit dd2934a95701576203b2f61e8ded4e4a2f9183ea
Author: Florian Westphal <fw@...len.de>
Date:   Mon Sep 17 10:02:54 2018 +0000

     netfilter: conntrack: remove l3->l4 mapping information

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=10957485e00000
start commit:   d89091a4 macb: Don't unregister clks unconditionally
git tree:       net
final crash:    https://syzkaller.appspot.com/x/report.txt?x=12957485e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=14957485e00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=f2f3ef188b7e16cf
dashboard link: https://syzkaller.appspot.com/bug?extid=46a4ad33f345d1dd346e
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12ff2869e00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16693751e00000

Reported-by: syzbot+46a4ad33f345d1dd346e@...kaller.appspotmail.com
Fixes: dd2934a95701 ("netfilter: conntrack: remove l3->l4 mapping  
information")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection