linux-kernel - Re: WARNING: suspicious RCU usage in pid

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Message-ID: <0000000000003c0b2105981fad65@google.com>
Date:   Sun, 24 Nov 2019 15:05:01 -0800
From:   syzbot <syzbot+c2d4c3ae3fd90bbaf059@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, ast@...nel.org, davem@...emloft.net,
        dhowells@...hat.com, dsahern@...il.com, dvyukov@...gle.com,
        ebiederm@...ssion.com, gs051095@...il.com, kuznet@....inr.ac.ru,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        oleg@...hat.com, pasha.tatashin@...cle.com, riel@...hat.com,
        rppt@...ux.vnet.ibm.com, syzkaller-bugs@...glegroups.com,
        wangkefeng.wang@...wei.com, weiyongjun1@...wei.com,
        yoshfuji@...ux-ipv6.org
Subject: Re: WARNING: suspicious RCU usage in pid_task

syzbot has bisected this bug to:

commit 23fb93a4d3f118a900790066d03368a296dce0d6
Author: David Ahern <dsahern@...il.com>
Date:   Wed Apr 18 00:33:23 2018 +0000

     net/ipv6: Cleanup exception and cache route handling

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1295147ae00000
start commit:   6f0d349d Merge git://git.kernel.org/pub/scm/linux/kernel/g..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=1195147ae00000
console output: https://syzkaller.appspot.com/x/log.txt?x=1695147ae00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=a63be0c83e84d370
dashboard link: https://syzkaller.appspot.com/bug?extid=c2d4c3ae3fd90bbaf059
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14f0a814400000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16ce574c400000

Reported-by: syzbot+c2d4c3ae3fd90bbaf059@...kaller.appspotmail.com
Fixes: 23fb93a4d3f1 ("net/ipv6: Cleanup exception and cache route handling")

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