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SubjectRe: general protection fault in dccp_timeout_nlattr_to_obj
From
syzbot has bisected this bug to:

commit dd2934a95701576203b2f61e8ded4e4a2f9183ea
Author: Florian Westphal <fw@strlen.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@syzkaller.appspotmail.com
Fixes: dd2934a95701 ("netfilter: conntrack: remove l3->l4 mapping
information")

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

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