From: Bart Van Assche Subject: Re: INFO: task hung in blk_queue_enter Date: Wed, 16 May 2018 14:56:42 +0000 Message-ID: <43327033306c3dd2f7c3717d64ce22415b6f3451.camel@wdc.com> References: <0000000000009b212b056ae6dbad@google.com> <343bbbf6-64eb-879e-d19e-96aebb037d47@I-love.SAKURA.ne.jp> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Cc: "linux-kernel@vger.kernel.org" , "jthumshirn@suse.de" , "alan.christopher.jenkins@gmail.com" , "hch@lst.de" , "martin.petersen@oracle.com" , "dvyukov@google.com" , "ming.lei@redhat.com" , "martin@lichtvoll.de" , "oleksandr@natalenko.name" , "hare@suse.com" , "ross.zwisler@linux.intel.com" , "keith.busch@intel.com" , "linux-ext4@vger.kernel.org" To: "syzbot+c4f9cebf9d651f6e54de@syzkaller.appspotmail.com" , "syzkaller-bugs@googlegroups.com" , "dan.j.williams@intel.com" , "linux-block@vger.kernel.org" , "penguin-kernel@I-love.SAKURA.ne.jp" , "axboe@kernel.dk" Return-path: In-Reply-To: Content-Language: en-US Content-ID: Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org T24gV2VkLCAyMDE4LTA1LTE2IGF0IDIyOjA1ICswOTAwLCBUZXRzdW8gSGFuZGEgd3JvdGU6DQo+ IE9uZSBvcmUgbW9yZSB0aHJlYWRzIGFyZSB3YWl0aW5nIGZvciBxLT5tcV9mcmVlemVfZGVwdGgg dG8gYmVjb21lIDAuIEJ1dCB0aGUNCj4gdGhyZWFkIHdobyBpbmNyZW1lbnRlZCBxLT5tcV9mcmVl emVfZGVwdGggYXQgYmxrX2ZyZWV6ZV9xdWV1ZV9zdGFydChxKSBmcm9tDQo+IGJsa19mcmVlemVf cXVldWUoKSBpcyB3YWl0aW5nIGF0IGJsa19tcV9mcmVlemVfcXVldWVfd2FpdCgpLiBUaGVyZWZv cmUsDQo+IGF0b21pY19yZWFkKCZxLT5tcV9mcmVlemVfZGVwdGgpID09IDAgY29uZGl0aW9uIGZv ciB3YWl0X2V2ZW50KCkgaW4NCj4gYmxrX3F1ZXVlX2VudGVyKCkgd2lsbCBuZXZlciBiZSBzYXRp c2ZpZWQuIEJ1dCB3aGF0IGRvZXMgdGhhdCB3YWl0X2V2ZW50KCkNCj4gd2FudCB0byBkbz8gSXNu J3QgInN0YXJ0IGZyZWV6aW5nIiBhIHNvcnQgb2YgYmxrX3F1ZXVlX2R5aW5nKHEpID09IHRydWU/ DQo+IFNpbmNlIHBlcmNwdV9yZWZfdHJ5Z2V0X2xpdmUoJnEtPnFfdXNhZ2VfY291bnRlcikgZmFp bGVkIGFuZCB0aGUgcXVldWUgaXMNCj4gYWJvdXQgdG8gYmUgZnJvemVuLCBzaG91bGRuJ3Qgd2Ug dHJlYXQgYXRvbWljX3JlYWQoJnEtPm1xX2ZyZWV6ZV9kZXB0aCkgIT0gMA0KPiBhcyBpZiBibGtf cXVldWVfZHlpbmcocSkgPT0gdHJ1ZT8gVGhhdCBpcywgc29tZXRoaW5nIGxpa2UgYmVsb3c6DQo+ IA0KPiBkaWZmIC0tZ2l0IGEvYmxvY2svYmxrLWNvcmUuYyBiL2Jsb2NrL2Jsay1jb3JlLmMNCj4g aW5kZXggODU5MDliNC4uNTllMjQ5NiAxMDA2NDQNCj4gLS0tIGEvYmxvY2svYmxrLWNvcmUuYw0K PiArKysgYi9ibG9jay9ibGstY29yZS5jDQo+IEBAIC05NTEsMTAgKzk1MSwxMCBAQCBpbnQgYmxr X3F1ZXVlX2VudGVyKHN0cnVjdCByZXF1ZXN0X3F1ZXVlICpxLCBibGtfbXFfcmVxX2ZsYWdzX3Qg ZmxhZ3MpDQo+ICAJCXNtcF9ybWIoKTsNCj4gIA0KPiAgCQl3YWl0X2V2ZW50KHEtPm1xX2ZyZWV6 ZV93cSwNCj4gLQkJCSAgIChhdG9taWNfcmVhZCgmcS0+bXFfZnJlZXplX2RlcHRoKSA9PSAwICYm DQo+IC0JCQkgICAgKHByZWVtcHQgfHwgIWJsa19xdWV1ZV9wcmVlbXB0X29ubHkocSkpKSB8fA0K PiArCQkJICAgYXRvbWljX3JlYWQoJnEtPm1xX2ZyZWV6ZV9kZXB0aCkgfHwNCj4gKwkJCSAgIChw cmVlbXB0IHx8ICFibGtfcXVldWVfcHJlZW1wdF9vbmx5KHEpKSB8fA0KPiAgCQkJICAgYmxrX3F1 ZXVlX2R5aW5nKHEpKTsNCj4gLQkJaWYgKGJsa19xdWV1ZV9keWluZyhxKSkNCj4gKwkJaWYgKGF0 b21pY19yZWFkKCZxLT5tcV9mcmVlemVfZGVwdGgpIHx8IGJsa19xdWV1ZV9keWluZyhxKSkNCj4g IAkJCXJldHVybiAtRU5PREVWOw0KPiAgCX0NCj4gIH0NCg0KVGhhdCBjaGFuZ2UgbG9va3Mgd3Jv bmcgdG8gbWUuIEFkZGl0aW9uYWxseSwgSSB0aGluayB0aGF0IHlvdSBhcmUgbG9va2luZyBpbg0K dGhlIHdyb25nIGRpcmVjdGlvbi4gU2luY2UgYmxrX21xX2ZyZWV6ZV9xdWV1ZV93YWl0KCkgYW5k IGJsa19xdWV1ZV9lbnRlcigpDQp3b3JrIGZpbmUgZm9yIGFsbCBibG9jayBkcml2ZXJzIGV4Y2Vw dCB0aGUgbG9vcCBkcml2ZXIgSSB0aGluayB0aGF0IHlvdSBzaG91bGQNCmhhdmUgYSBjbG9zZXIg bG9vayBhdCBob3cgdGhlIGxvb3AgZHJpdmVyIHVzZXMgdGhpcyBibG9jayBsYXllciBmdW5jdGlv bmFsaXR5Lg0KDQpUaGFua3MsDQoNCkJhcnQuDQoNCg0KDQo=