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Fri, 22 Nov 2019 18:22:59 +0000 Received: from MWHPR15MB1165.namprd15.prod.outlook.com ([fe80::f831:d112:6187:90d9]) by MWHPR15MB1165.namprd15.prod.outlook.com ([fe80::f831:d112:6187:90d9%4]) with mapi id 15.20.2474.021; Fri, 22 Nov 2019 18:22:59 +0000 From: Song Liu To: syzbot CC: Arnaldo Carvalho de Melo , Arnaldo Carvalho de Melo , Alexander Shishkin , "daniel@iogearbox.net" , "davem@davemloft.net" , Josef Bacik , "jolsa@redhat.com" , Kernel Team , "linux-kernel@vger.kernel.org" , "mingo@kernel.org" , "mingo@redhat.com" , "namhyung@kernel.org" , "peterz@infradead.org" , "rostedt@goodmis.org" , "syzkaller-bugs@googlegroups.com" , "tglx@linutronix.de" , "torvalds@linux-foundation.org" , Yonghong Song Subject: Re: WARNING in perf_group_attach Thread-Topic: WARNING in perf_group_attach Thread-Index: AQHVoVH25/qmk/NwcEW4gb8ew/muWqeXgRcA Date: Fri, 22 Nov 2019 18:22:59 +0000 Message-ID: <0338F995-1B84-4825-A7C9-ADDC0076A5F2@fb.com> References: <0000000000004c40290597f1e91e@google.com> In-Reply-To: <0000000000004c40290597f1e91e@google.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: Apple Mail (2.3601.0.10) x-originating-ip: [2620:10d:c090:200::ec92] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: d5a1fd92-1bfc-440e-81b3-08d76f7900e7 x-ms-traffictypediagnostic: MWHPR15MB1695: x-ms-exchange-purlcount: 8 x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:59; x-forefront-prvs: 02296943FF x-forefront-antispam-report: SFV:NSPM;SFS:(10001)(10019020)(396003)(346002)(366004)(376002)(136003)(39860400002)(189003)(199004)(51914003)(2906002)(86362001)(81156014)(229853002)(6246003)(6512007)(81166006)(6436002)(6306002)(76116006)(8676002)(46003)(305945005)(7736002)(36756003)(966005)(50226002)(478600001)(66946007)(66476007)(8936002)(14454004)(6116002)(99286004)(7416002)(66446008)(64756008)(66556008)(53546011)(102836004)(71200400001)(54906003)(25786009)(186003)(6486002)(33656002)(316002)(6506007)(71190400001)(76176011)(4326008)(446003)(5660300002)(11346002)(256004)(2616005)(7116003)(99710200001);DIR:OUT;SFP:1102;SCL:1;SRVR:MWHPR15MB1695;H:MWHPR15MB1165.namprd15.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A:1; received-spf: None (protection.outlook.com: fb.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: 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 Content-Type: text/plain; charset="us-ascii" Content-ID: <2605F40DA10A744B88305CC30376015A@namprd15.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: d5a1fd92-1bfc-440e-81b3-08d76f7900e7 X-MS-Exchange-CrossTenant-originalarrivaltime: 22 Nov 2019 18:22:59.0553 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 8ae927fe-1255-47a7-a2af-5f3a069daaa2 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: S2AXkL7mC9B4HMGBrMotjEOpZh0B4w7BRJBD4lsdWqQGNeHHpOhSRJKvpGLzyXmzqWiuP9cqFPOH6qwyOTdKJw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHPR15MB1695 X-OriginatorOrg: fb.com X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2019-11-22_03:2019-11-21,2019-11-22 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 bulkscore=0 phishscore=0 lowpriorityscore=0 suspectscore=0 clxscore=1011 priorityscore=1501 mlxlogscore=972 adultscore=0 spamscore=0 mlxscore=0 impostorscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-1911220152 X-FB-Internal: deliver Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > On Nov 22, 2019, at 8:29 AM, syzbot wrote: >=20 > syzbot has bisected this bug to: >=20 > commit 33ea4b24277b06dbc55d7f5772a46f029600255e > Author: Song Liu > Date: Wed Dec 6 22:45:16 2017 +0000 >=20 > perf/core: Implement the 'perf_uprobe' PMU >=20 > bisection log: https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__sy= zkaller.appspot.com_x_bisect.txt-3Fx-3D1038fecae00000&d=3DDwIBaQ&c=3D5VD0RT= tNlTh3ycd41b3MUw&r=3Di6WobKxbeG3slzHSIOxTVtYIJw7qjCE6S0spDTKL-J4&m=3Dtwva4o= 7mjqFOvS4tIPaO-5jjo-XAwT9qjmMqY7gRsLM&s=3D3ABayY9CyfQkmQs0KgB2fcFws0p7utMNa= 7tcrLE0b4Y&e=3Dstart commit: 0072a0c1 Merge tag 'media/v4.20-4' of git://= git.kernel.org.. > git tree: upstream > final crash: https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__sy= zkaller.appspot.com_x_report.txt-3Fx-3D1238fecae00000&d=3DDwIBaQ&c=3D5VD0RT= tNlTh3ycd41b3MUw&r=3Di6WobKxbeG3slzHSIOxTVtYIJw7qjCE6S0spDTKL-J4&m=3Dtwva4o= 7mjqFOvS4tIPaO-5jjo-XAwT9qjmMqY7gRsLM&s=3DCZ1NX6DT4kikiKc9qfHrpHrBGrPBNOzUU= wcp-avrDlo&e=3Dconsole output: https://urldefense.proofpoint.com/v2/url?u= =3Dhttps-3A__syzkaller.appspot.com_x_log.txt-3Fx-3D1438fecae00000&d=3DDwIBa= Q&c=3D5VD0RTtNlTh3ycd41b3MUw&r=3Di6WobKxbeG3slzHSIOxTVtYIJw7qjCE6S0spDTKL-J= 4&m=3Dtwva4o7mjqFOvS4tIPaO-5jjo-XAwT9qjmMqY7gRsLM&s=3DGbwfq2mU_2xkXjM2LVOht= 4iV94BqNlAVlldmf99YE2o&e=3Dkernel config: https://urldefense.proofpoint.co= m/v2/url?u=3Dhttps-3A__syzkaller.appspot.com_x_.config-3Fx-3Db9cc5a440391cb= fd&d=3DDwIBaQ&c=3D5VD0RTtNlTh3ycd41b3MUw&r=3Di6WobKxbeG3slzHSIOxTVtYIJw7qjC= E6S0spDTKL-J4&m=3Dtwva4o7mjqFOvS4tIPaO-5jjo-XAwT9qjmMqY7gRsLM&s=3D80FYgyg5l= xOA80Ae-t5h5madX7fI4JOulTaVL6A5OIE&e=3Ddashboard link: https://urldefense.p= roofpoint.com/v2/url?u=3Dhttps-3A__syzkaller.appspot.com_bug-3Fextid-3D23fe= 48cbe532abffa52e&d=3DDwIBaQ&c=3D5VD0RTtNlTh3ycd41b3MUw&r=3Di6WobKxbeG3slzHS= IOxTVtYIJw7qjCE6S0spDTKL-J4&m=3Dtwva4o7mjqFOvS4tIPaO-5jjo-XAwT9qjmMqY7gRsLM= &s=3DCLG4xu3n98RYL4iBP5vb_BVLur-IxZkzQf5KMgJKEBQ&e=3Dsyz repro: https:= //urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__syzkaller.appspot.com_x_re= pro.syz-3Fx-3D135e93eb400000&d=3DDwIBaQ&c=3D5VD0RTtNlTh3ycd41b3MUw&r=3Di6Wo= bKxbeG3slzHSIOxTVtYIJw7qjCE6S0spDTKL-J4&m=3Dtwva4o7mjqFOvS4tIPaO-5jjo-XAwT9= qjmMqY7gRsLM&s=3DrE9GDnbBf2V3RMoW8TmNFJxPVfG2W27IzFAQ4534Yok&e=3DC reproduc= er: https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__syzkaller.apps= pot.com_x_repro.c-3Fx-3D13189415400000&d=3DDwIBaQ&c=3D5VD0RTtNlTh3ycd41b3MU= w&r=3Di6WobKxbeG3slzHSIOxTVtYIJw7qjCE6S0spDTKL-J4&m=3Dtwva4o7mjqFOvS4tIPaO-= 5jjo-XAwT9qjmMqY7gRsLM&s=3Dzu43yb0MPn0VZeQKwG-EDUHqYYgHgJhJrRcYp6dl-dE&e=3D > Reported-by: syzbot+23fe48cbe532abffa52e@syzkaller.appspotmail.com > Fixes: 33ea4b24277b ("perf/core: Implement the 'perf_uprobe' PMU") >=20 > For information about bisection process see: https://urldefense.proofpoin= t.com/v2/url?u=3Dhttps-3A__goo.gl_tpsmEJ-23bisection&d=3DDwIBaQ&c=3D5VD0RTt= NlTh3ycd41b3MUw&r=3Di6WobKxbeG3slzHSIOxTVtYIJw7qjCE6S0spDTKL-J4&m=3Dtwva4o7= mjqFOvS4tIPaO-5jjo-XAwT9qjmMqY7gRsLM&s=3DYWXIJgdau0PZoF8t4mWq-2xQY88lKIzCF0= JnR-ZM4Ao&e=3D Thanks for the report. I will look into the fix.=20 Song=