From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B2D6FC433EF for ; Wed, 17 Nov 2021 09:46:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 94CCB61A52 for ; Wed, 17 Nov 2021 09:46:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235474AbhKQJte (ORCPT ); Wed, 17 Nov 2021 04:49:34 -0500 Received: from smtp-fw-80007.amazon.com ([99.78.197.218]:32605 "EHLO smtp-fw-80007.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231895AbhKQJtd (ORCPT ); Wed, 17 Nov 2021 04:49:33 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.co.uk; i=@amazon.co.uk; q=dns/txt; s=amazon201209; t=1637142395; x=1668678395; h=from:to:cc:date:message-id:references:in-reply-to: content-id:mime-version:content-transfer-encoding:subject; bh=LEmI6WBXYcxTJDRa9KaSwTD+aAFNr6PKPnhicl5YcUU=; b=BN9Leuvx/5S2DtA0b/WNW7fEChkhjWJUwl5+tD8FqOFokgYnX/6ChiNH /y2joDLg5FMHkS4Ypj/jCzuSTeFpvmw2vJv3hDtzEdBxSmw9owhQLrcay jE21EGvIzxHaW1PTbFd5KWNPmbQOxRou8nQ30ieXBv2+tOAJ34Cw/uyw/ k=; X-IronPort-AV: E=Sophos;i="5.87,241,1631577600"; d="scan'208";a="42073659" Subject: Re: There is a null-ptr-deref bug in kvm_dirty_ring_get in virt/kvm/dirty_ring.c Thread-Topic: There is a null-ptr-deref bug in kvm_dirty_ring_get in virt/kvm/dirty_ring.c Received: from pdx4-co-svc-p1-lb2-vlan2.amazon.com (HELO email-inbound-relay-pdx-2c-72dc3927.us-west-2.amazon.com) ([10.25.36.210]) by smtp-border-fw-80007.pdx80.corp.amazon.com with ESMTP; 17 Nov 2021 09:46:19 +0000 Received: from EX13MTAUEE002.ant.amazon.com (pdx1-ws-svc-p6-lb9-vlan3.pdx.amazon.com [10.236.137.198]) by email-inbound-relay-pdx-2c-72dc3927.us-west-2.amazon.com (Postfix) with ESMTPS id 7722541591; Wed, 17 Nov 2021 09:46:19 +0000 (UTC) Received: from EX13D08UEE003.ant.amazon.com (10.43.62.118) by EX13MTAUEE002.ant.amazon.com (10.43.62.24) with Microsoft SMTP Server (TLS) id 15.0.1497.26; Wed, 17 Nov 2021 09:46:19 +0000 Received: from EX13D08UEE001.ant.amazon.com (10.43.62.126) by EX13D08UEE003.ant.amazon.com (10.43.62.118) with Microsoft SMTP Server (TLS) id 15.0.1497.26; Wed, 17 Nov 2021 09:46:18 +0000 Received: from EX13D08UEE001.ant.amazon.com ([10.43.62.126]) by EX13D08UEE001.ant.amazon.com ([10.43.62.126]) with mapi id 15.00.1497.026; Wed, 17 Nov 2021 09:46:18 +0000 From: "Woodhouse, David" To: "pbonzini@redhat.com" , "butterflyhuangxx@gmail.com" CC: "kvm@vger.kernel.org" , "linux-kernel@vger.kernel.org" Thread-Index: AQHXxreOTE1P+MiJT0+87zK1gaBo/KwHon+A Date: Wed, 17 Nov 2021 09:46:18 +0000 Message-ID: <4b739ed0ce31e459eb8af9f5b0e2b1516d8e4517.camel@amazon.co.uk> References: <9eb83cdd-9314-0d1f-0d4b-0cf4432e1e84@redhat.com> In-Reply-To: <9eb83cdd-9314-0d1f-0d4b-0cf4432e1e84@redhat.com> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.43.61.150] Content-Type: text/plain; charset="utf-8" Content-ID: <2DE2CA63E476C446BBD868BFDE90C188@amazon.com> MIME-Version: 1.0 Content-Transfer-Encoding: base64 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org T24gVGh1LCAyMDIxLTEwLTIxIGF0IDIyOjA4ICswMjAwLCBQYW9sbyBCb256aW5pIHdyb3RlOg0K PiBPbiAxOC8xMC8yMSAxOToxNCwgYnV0dDNyZmx5aDRjayB3cm90ZToNCj4gPiB7DQo+ID4gc3Ry dWN0IGt2bV92Y3B1ICp2Y3B1ID0ga3ZtX2dldF9ydW5uaW5nX3ZjcHUoKTsgIC8vLS0tLS0tLT4g aW52b2tlDQo+ID4ga3ZtX2dldF9ydW5uaW5nX3ZjcHUoKSB0byBnZXQgYSB2Y3B1Lg0KPiA+IA0K PiA+IFdBUk5fT05fT05DRSh2Y3B1LT5rdm0gIT0ga3ZtKTsgWzFdDQo+ID4gDQo+ID4gcmV0dXJu ICZ2Y3B1LT5kaXJ0eV9yaW5nOw0KPiA+IH0NCj4gPiBgYGANCj4gPiBidXQgd2UgaGFkIG5vdCBj YWxsZWQgS1ZNX0NSRUFURV9WQ1BVIGlvY3RsIHRvIGNyZWF0ZSBhIGt2bV92Y3B1IHNvDQo+ID4g dmNwdSBpcyBOVUxMLg0KPiANCj4gSXQncyBub3QganVzdCBiZWNhdXNlIHRoZXJlIHdhcyBubyBj YWxsIHRvIEtWTV9DUkVBVEVfVkNQVTsgaW4gZ2VuZXJhbA0KPiBrdm0tPmRpcnR5X3Jpbmdfc2l6 ZSBvbmx5IHdvcmtzIGlmIGFsbCB3cml0ZXMgYXJlIGFzc29jaWF0ZWQgdG8gYQ0KPiBzcGVjaWZp YyB2Q1BVLCB3aGljaCBpcyBub3QgdGhlIGNhc2UgZm9yIHRoZSBvbmUgb2YNCj4ga3ZtX3hlbl9z aGFyZWRfaW5mb19pbml0Lg0KPiANCj4gRGF2aWQsIHdoYXQgZG8geW91IHRoaW5rPyAgTWFraW5n IGRpcnR5LXBhZ2UgcmluZyBidWZmZXIgaW5jb21wYXRpYmxlDQo+IHdpdGggWGVuIGlzIHVnbHkg YW5kIEknZCByYXRoZXIgYXZvaWQgaXQ7IHRha2luZyB0aGUgbXV0ZXggZm9yIHZjcHUgMCBpcw0K PiBub3QgYW4gb3B0aW9uIGJlY2F1c2UsIGFzIHRoZSByZXBvcnRlciBzYWlkLCB5b3UgbWlnaHQg bm90IGhhdmUgZXZlbg0KPiBjcmVhdGVkIGEgdkNQVSB5ZXQgd2hlbiB5b3UgY2FsbCBLVk1fWEVO X0hWTV9TRVRfQVRUUi4gIFRoZSByZW1haW5pbmcNCj4gb3B0aW9uIHdvdWxkIGJlIGp1c3QgImRv IG5vdCBtYXJrIHRoZSBwYWdlIGFzIGRpcnR5IGlmIHRoZSByaW5nIGJ1ZmZlcg0KPiBpcyBhY3Rp dmUiLiAgVGhpcyBpcyBmZWFzaWJsZSBiZWNhdXNlIHVzZXJzcGFjZSBpdHNlbGYgaGFzIHBhc3Nl ZCB0aGUNCj4gc2hhcmVkIGluZm8gZ2ZuOyBidXQgYWdhaW4sIGl0J3MgdWdseS4uLg0KDQpJIHRo aW5rIEkgYW0gY29taW5nIHRvIHF1aXRlIGxpa2UgdGhhdCAncmVtYWluaW5nIG9wdGlvbicgYXMg bG9uZyBhcyB3ZQ0KcmVwaHJhc2UgaXQgYXMgZm9sbG93czoNCg0KIEtWTSBkb2VzIG5vdCBtYXJr IHRoZSBzaGFyZWRfaW5mbyBwYWdlIGFzIGRpcnR5LCBhbmQgdXNlcnNwYWNlIGlzDQogZXhwZWN0 ZWQgdG8gKmFzc3VtZSogdGhhdCBpdCBpcyBkaXJ0eSBhdCBhbGwgdGltZXMuIEl0J3MgdXNlZCBm b3INCiBkZWxpdmVyaW5nIGV2ZW50IGNoYW5uZWwgaW50ZXJydXB0cyBhbmQgdGhlIG92ZXJoZWFk IG9mIG1hcmtpbmcgaXQNCiBkaXJ0eSBlYWNoIHRpbWUgaXMganVzdCBwb2ludGxlc3MuDQoNCkkn dmUgbWVyZ2VkIHRoZSBwYXRjaCBJIHNlbnQgeWVzdGVyZGF5IGludG8gbXkgcGZuY2FjaGUgc2Vy aWVzIGJlY2F1c2UNCkkgcmVhbGlzZWQgd2UgbmVlZGVkIHRoZSBzYW1lIHRoZXJlLCBidXQgSSds bCBsb29rIGF0IG1ha2luZyB0aGUgWGVuDQpjb2RlICpub3QqIG1hcmsgdGhlIHNoaW5mbyBwYWdl IGRpcnR5IHdoZW4gaXQgd3JpdGVzIHRoZSBjbG9jayBkYXRhDQp0aGVyZS4NCgoKCkFtYXpvbiBE ZXZlbG9wbWVudCBDZW50cmUgKExvbmRvbikgTHRkLiBSZWdpc3RlcmVkIGluIEVuZ2xhbmQgYW5k IFdhbGVzIHdpdGggcmVnaXN0cmF0aW9uIG51bWJlciAwNDU0MzIzMiB3aXRoIGl0cyByZWdpc3Rl cmVkIG9mZmljZSBhdCAxIFByaW5jaXBhbCBQbGFjZSwgV29yc2hpcCBTdHJlZXQsIExvbmRvbiBF QzJBIDJGQSwgVW5pdGVkIEtpbmdkb20uCgoK