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Date:   Wed, 22 May 2019 13:38:49 +0000
From:   Jon Maloy <jon.maloy@...csson.com>
To:     syzbot <syzbot+6440134c13554d3abfb0@...kaller.appspotmail.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "hujunwei4@...wei.com" <hujunwei4@...wei.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "syzkaller-bugs@...glegroups.com" <syzkaller-bugs@...glegroups.com>,
        "tipc-discussion@...ts.sourceforge.net" 
        <tipc-discussion@...ts.sourceforge.net>,
        "wangxiaogang3@...wei.com" <wangxiaogang3@...wei.com>,
        "ying.xue@...driver.com" <ying.xue@...driver.com>
Subject: RE: WARNING: locking bug in rhashtable_walk_enter



> -----Original Message-----
> From: netdev-owner@...r.kernel.org <netdev-owner@...r.kernel.org>
> On Behalf Of syzbot
> Sent: 21-May-19 17:08
> To: davem@...emloft.net; hujunwei4@...wei.com; Jon Maloy
> <jon.maloy@...csson.com>; linux-kernel@...r.kernel.org;
> netdev@...r.kernel.org; syzkaller-bugs@...glegroups.com; tipc-
> discussion@...ts.sourceforge.net; wangxiaogang3@...wei.com;
> ying.xue@...driver.com
> Subject: Re: WARNING: locking bug in rhashtable_walk_enter
> 
> syzbot has bisected this bug to:
> 
> commit 7e27e8d6130c5e88fac9ddec4249f7f2337fe7f8
> Author: Junwei Hu <hujunwei4@...wei.com>
> Date:   Thu May 16 02:51:15 2019 +0000
> 
>      tipc: switch order of device registration to fix a crash

This bug was fixed by:
commit 526f5b851a96 (" tipc: fix modprobe tipc failed after switch order of device registration")

///jon

> 
> bisection log:  https://protect2.fireeye.com/url?k=c4fa0d6e-982e08d1-
> c4fa4df5-868f633dbf25-
> 265eeab89c3c62e3&q=1&u=https%3A%2F%2Fsyzkaller.appspot.com%2Fx%2
> Fbisect.txt%3Fx%3D1285d39ca00000
> start commit:   f49aa1de Merge tag 'for-5.2-rc1-tag' of git://git.kernel.o..
> git tree:       upstream
> final crash:    https://protect2.fireeye.com/url?k=f892c3bf-a446c600-
> f8928324-868f633dbf25-
> a1f259f41c2e3c70&q=1&u=https%3A%2F%2Fsyzkaller.appspot.com%2Fx%2F
> report.txt%3Fx%3D1185d39ca00000
> console output: https://protect2.fireeye.com/url?k=a265e997-feb1ec28-
> a265a90c-868f633dbf25-
> 3536c18414f0985d&q=1&u=https%3A%2F%2Fsyzkaller.appspot.com%2Fx%2
> Flog.txt%3Fx%3D1685d39ca00000
> kernel config:  https://protect2.fireeye.com/url?k=e063d9ce-bcb7dc71-
> e0639955-868f633dbf25-
> 34fb69deb3d9bb60&q=1&u=https%3A%2F%2Fsyzkaller.appspot.com%2Fx%
> 2F.config%3Fx%3Dfc045131472947d7
> dashboard link: https://protect2.fireeye.com/url?k=b1ac8435-ed78818a-
> b1acc4ae-868f633dbf25-
> 92f95bff1ae4b05d&q=1&u=https%3A%2F%2Fsyzkaller.appspot.com%2Fbug
> %3Fextid%3D6440134c13554d3abfb0
> syz repro:      https://protect2.fireeye.com/url?k=0473f5e5-58a7f05a-
> 0473b57e-868f633dbf25-
> 3d8da37dd852ac3b&q=1&u=https%3A%2F%2Fsyzkaller.appspot.com%2Fx%2
> Frepro.syz%3Fx%3D10c586bca00000
> C reproducer:   https://protect2.fireeye.com/url?k=0797bac5-5b43bf7a-
> 0797fa5e-868f633dbf25-
> ba5da04a9604be86&q=1&u=https%3A%2F%2Fsyzkaller.appspot.com%2Fx%2
> Frepro.c%3Fx%3D14759fb2a00000
> 
> Reported-by: syzbot+6440134c13554d3abfb0@...kaller.appspotmail.com
> Fixes: 7e27e8d6130c ("tipc: switch order of device registration to fix a
> crash")
> 
> For information about bisection process see:
> https://protect2.fireeye.com/url?k=dd8443d3-8150466c-dd840348-
> 868f633dbf25-
> e8766eb633d4e43d&q=1&u=https%3A%2F%2Fgoo.gl%2FtpsmEJ%23bisectio
> n

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