linux-kernel - Re: general protection fault in tcp_cleanup

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Date:   Fri, 29 Mar 2019 22:17:01 -0700
From:   syzbot <syzbot+0b3ccd4f62dac2cf3a7d@...kaller.appspotmail.com>
To:     ast@...nel.org, daniel@...earbox.net, davem@...emloft.net,
        edumazet@...gle.com, john.fastabend@...il.com,
        kuznet@....inr.ac.ru, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, songliubraving@...com,
        syzkaller-bugs@...glegroups.com, yoshfuji@...ux-ipv6.org
Subject: Re: general protection fault in tcp_cleanup_ulp

syzbot has bisected this bug to:

commit 90545cdc3f2b2ea700e24335610cd181e73756da
Author: Daniel Borkmann <daniel@...earbox.net>
Date:   Thu Aug 16 19:49:07 2018 +0000

     tcp, ulp: fix leftover icsk_ulp_ops preventing sock from reattach

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=15dab897200000
start commit:   28619527 Merge git://git.kernel.org/pub/scm/linux/kernel/g..
git tree:       bpf
final crash:    https://syzkaller.appspot.com/x/report.txt?x=17dab897200000
console output: https://syzkaller.appspot.com/x/log.txt?x=13dab897200000
kernel config:  https://syzkaller.appspot.com/x/.config?x=8f59875069d721b6
dashboard link: https://syzkaller.appspot.com/bug?extid=0b3ccd4f62dac2cf3a7d
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13537269400000

Reported-by: syzbot+0b3ccd4f62dac2cf3a7d@...kaller.appspotmail.com
Fixes: 90545cdc3f2b ("tcp, ulp: fix leftover icsk_ulp_ops preventing sock  
from reattach")

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