linux-kernel - Re: INFO: rcu detected stall in tipc

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Date:   Thu, 16 Jul 2020 21:20:04 -0700
From:   syzbot <syzbot+3654c027d861c6df4b06@...kaller.appspotmail.com>
To:     bp@...en8.de, davem@...emloft.net, fweisbec@...il.com,
        hpa@...or.com, jmaloy@...hat.com, jmattson@...gle.com,
        joro@...tes.org, kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        mingo@...nel.org, mingo@...hat.com, pbonzini@...hat.com,
        sean.j.christopherson@...el.com, syzkaller-bugs@...glegroups.com,
        tglx@...utronix.de, tuong.t.lien@...tech.com.au,
        vkuznets@...hat.com, wanpengli@...cent.com, x86@...nel.org
Subject: Re: INFO: rcu detected stall in tipc_release

syzbot has bisected this issue to:

commit 5e9eeccc58f3e6bcc99b929670665d2ce047e9c9
Author: Tuong Lien <tuong.t.lien@...tech.com.au>
Date:   Wed Jun 3 05:06:01 2020 +0000

    tipc: fix NULL pointer dereference in streaming

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14641620900000
start commit:   7cc2a8ea Merge tag 'block-5.8-2020-07-01' of git://git.ker..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=16641620900000
console output: https://syzkaller.appspot.com/x/log.txt?x=12641620900000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7be693511b29b338
dashboard link: https://syzkaller.appspot.com/bug?extid=3654c027d861c6df4b06
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12948233100000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11344c05100000

Reported-by: syzbot+3654c027d861c6df4b06@...kaller.appspotmail.com
Fixes: 5e9eeccc58f3 ("tipc: fix NULL pointer dereference in streaming")

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