linux-kernel - Re: WARNING: refcount bug in sk

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Date:   Sat, 21 Mar 2020 03:06:03 -0700
From:   syzbot <syzbot+b1212b1215db82ff9211@...kaller.appspotmail.com>
To:     alexios.zavras@...el.com, allison@...utok.net, andriin@...com,
        ap420073@...il.com, ast@...nel.org, bpf@...r.kernel.org,
        daniel@...earbox.net, davem@...emloft.net, ebiederm@...ssion.com,
        gregkh@...uxfoundation.org, jhogan@...nel.org, kafai@...com,
        keescook@...omium.org, kuba@...nel.org, kuznet@....inr.ac.ru,
        linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org,
        lirongqing@...du.com, mojha@...eaurora.org, netdev@...r.kernel.org,
        paulburton@...nel.org, penguin-kernel@...ove.SAKURA.ne.jp,
        ptalbert@...hat.com, ralf@...ux-mips.org, rppt@...ux.ibm.com,
        songliubraving@...com, swinslow@...il.com,
        syzkaller-bugs@...glegroups.com, tbogendoerfer@...e.de,
        tglx@...utronix.de, yhs@...com, yoshfuji@...ux-ipv6.org
Subject: Re: WARNING: refcount bug in sk_alloc (2)

syzbot has bisected this bug to:

commit b78e9d63a3b6307b6b786e6ba189d3978b60ceb5
Author: Thomas Bogendoerfer <tbogendoerfer@...e.de>
Date:   Thu Jan 9 12:33:40 2020 +0000

    MIPS: SGI-IP27: use asm/sn/agent.h for including HUB related stuff

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=17330a23e00000
start commit:   0d1c3530 net_sched: keep alloc_hash updated after hash all..
git tree:       net
final crash:    https://syzkaller.appspot.com/x/report.txt?x=14b30a23e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=10b30a23e00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=c2e311dba9a02ba9
dashboard link: https://syzkaller.appspot.com/bug?extid=b1212b1215db82ff9211
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14e76a39e00000

Reported-by: syzbot+b1212b1215db82ff9211@...kaller.appspotmail.com
Fixes: b78e9d63a3b6 ("MIPS: SGI-IP27: use asm/sn/agent.h for including HUB related stuff")

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