From patchwork Sat Sep 15 01:29:48 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sasha Levin X-Patchwork-Id: 10601369 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BED8114DA for ; Sat, 15 Sep 2018 01:52:42 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9E2F52B782 for ; Sat, 15 Sep 2018 01:52:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 927DC2B785; Sat, 15 Sep 2018 01:52:42 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 246D32B782 for ; Sat, 15 Sep 2018 01:52:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726669AbeIOGqt (ORCPT ); Sat, 15 Sep 2018 02:46:49 -0400 Received: from mail-eopbgr680131.outbound.protection.outlook.com ([40.107.68.131]:36298 "EHLO NAM04-BN3-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725907AbeIOGqs (ORCPT ); Sat, 15 Sep 2018 02:46:48 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Gw3DcTXqhAyqMWPEyb/BP73Lp0K1xInekXWYMLoaoAc=; b=nUO8UPgf+foM5rOCG5KhtvlQ8/z1WIIZgAimCI759XIiEWUGiGo6PoQutqzOIr1B0wvY6WkeNxibWRuWsKWPeWo/GmeMsSdoFQk9VQXOkEi03fQp4xu21dvDqYnbrAdQKh4RtzFaoO/D30AWXB1cCk6T+kIhzK876+/GU8khGgI= Received: from CY4PR21MB0776.namprd21.prod.outlook.com (10.173.192.22) by CY4PR21MB0840.namprd21.prod.outlook.com (10.173.192.141) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1164.11; Sat, 15 Sep 2018 01:29:48 +0000 Received: from CY4PR21MB0776.namprd21.prod.outlook.com ([fe80::151:b6fe:32c8:cccd]) by CY4PR21MB0776.namprd21.prod.outlook.com ([fe80::151:b6fe:32c8:cccd%9]) with mapi id 15.20.1164.008; Sat, 15 Sep 2018 01:29:48 +0000 From: Sasha Levin To: "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: "Maciej W. Rozycki" , Paul Burton , Alexander Viro , James Hogan , Ralf Baechle , "linux-fsdevel@vger.kernel.org" , "linux-mips@linux-mips.org" , Sasha Levin Subject: [PATCH AUTOSEL 4.18 01/92] binfmt_elf: Respect error return from `regset->active' Thread-Topic: [PATCH AUTOSEL 4.18 01/92] binfmt_elf: Respect error return from `regset->active' Thread-Index: AQHUTJOX3Gl1zAloekmFBEeAfLsirw== Date: Sat, 15 Sep 2018 01:29:48 +0000 Message-ID: <20180915012944.179481-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;CY4PR21MB0840;6:9mxEAd+3t99jruaEcrN7cF+4/PdgMZP5Z4pyvEqMzq3I5ed4dtclznLpyN2FNIKHJYRFT7xJY8mpdzl50yWfYyL/sjveJwBZV9dnc45MOeDfHzAnh2pByHd5Mxhw5pJ/mGu0EHnpk8Bz+t7P64cWYT6ejug0p/zY9bU93XKtlCOe5vasUDlyhT+aq6sENJZqBkYdC09yiioW2APEdABIm5MvMi5FJdVc0Lswst8W69y57v5pCCtLl61YtkpmF1vI68Rf8dLp00CQoGE/npaETVqsasFvYVhAmIayRn7h4sK8Fne/lF2FHlxcwFObelbJOavgy3DBmAjCVdnO9Ys102ohz7Ew6zshW4PnEtJkZNZtISPI2z6//8LZW5YgFoNR8m4mAHmwUTAIhNEX1oCIw1g6OC3531nOc1D8F01O4rcDO0iT+84V3Fnf8+/Bol1+c1pS9SDhH4T6DW7E8fvKBQ==;5:0oBEyQ/WngFdHR670LI4IKSWYLS/UpuqkufH33aR2wCSqtPEEma7hKnGoa4q5V78K1uwd26KJNx6dPtMQM6xlZ0Td8YNNUcW6w1KVICF39iElQot/YcS0nMEr9RNR/iUJguzzpu7GVz+D8vaQruX06p0vj1WazWVuG2F1gE2XJ4=;7:a9r7JFb6RnkfHCq46KVwCOJl4Ih7QgpQesSSETIKfLPxG2LZNO/q7mFiXKznIpteDqehNnI6xiyLYbmBVSGV6rVHp/uCR+cZRblGunYQ70ey01jklfING5n3mGdi0t+R0pz22i7Nu/JU6GTWObVZsGx9p4MuA4DCRKnaj8E0lY+4xB9aUYGA+Xch9g4wRLtmx9Ir6iims66ex+2TAWAdTUTcw/BR0O3ppRtFNXwlNgiFRCO1fX92Qk+tHqAvOm5E x-ms-office365-filtering-correlation-id: 6bfedb47-d03e-4837-2350-08d61aaab9c9 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(7020095)(4652040)(8989137)(4534165)(4627221)(201703031133081)(201702281549075)(8990107)(5600074)(711020)(4618075)(2017052603328)(7193020);SRVR:CY4PR21MB0840; x-ms-traffictypediagnostic: CY4PR21MB0840: x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:(28532068793085)(89211679590171)(9452136761055); x-ms-exchange-senderadcheck: 1 x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(8211001083)(6040522)(2401047)(5005006)(8121501046)(3231353)(944501410)(52105095)(2018427008)(93006095)(93001095)(3002001)(10201501046)(6055026)(149027)(150027)(6041310)(20161123558120)(20161123564045)(20161123560045)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(20161123562045)(201708071742011)(7699050)(76991041);SRVR:CY4PR21MB0840;BCL:0;PCL:0;RULEID:;SRVR:CY4PR21MB0840; x-forefront-prvs: 0796EBEDE1 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(346002)(366004)(136003)(39860400002)(396003)(376002)(189003)(199004)(14444005)(6116002)(81166006)(2906002)(478600001)(3846002)(966005)(8676002)(106356001)(105586002)(10090500001)(22452003)(8936002)(486006)(2616005)(72206003)(36756003)(81156014)(186003)(26005)(14454004)(6506007)(217873002)(4326008)(25786009)(256004)(107886003)(102836004)(6346003)(476003)(1076002)(10290500003)(86362001)(66066001)(6436002)(6486002)(86612001)(53936002)(54906003)(2900100001)(97736004)(7736002)(6306002)(6512007)(305945005)(99286004)(2501003)(5660300001)(316002)(110136005)(5250100002)(68736007)(81973001);DIR:OUT;SFP:1102;SCL:1;SRVR:CY4PR21MB0840;H:CY4PR21MB0776.namprd21.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A:1; received-spf: None (protection.outlook.com: microsoft.com does not designate permitted sender hosts) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Alexander.Levin@microsoft.com; x-microsoft-antispam-message-info: iLJyjjfV2xXxe29qjREhlWAYbELlylsNP87aW9NJxpKO8Iaq9LwhM353stWAhRRvNMTR9FG6ovZYyS1cuhWfZlDTeuah4YN8lena+cUiDd7+Q02RQteFOaEirF62HYxpnTmiEe8vBhzE07xSscYlM4LXKZ4k7E0LhSeE1xOR3ZiFNTZl61f0ovEaCaJXSAn4iVHiSGWIftMZI7zwixivFxSIE7iWFc2p7+8vs7VcaXf3Sex82BsE0K1nD0p8UU/jgQzTtlY0JfjEGrwhVahQWQuE+fuW2MWfmpgWgvDwqhho2/INGhLL+Wi+JFfBrhuKJwk63mHIRdbEu3ltYtdEtiwTf+96Sesq/V0E6/2+5rM= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 6bfedb47-d03e-4837-2350-08d61aaab9c9 X-MS-Exchange-CrossTenant-originalarrivaltime: 15 Sep 2018 01:29:48.2295 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR21MB0840 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: "Maciej W. Rozycki" [ Upstream commit 2f819db565e82e5f73cd42b39925098986693378 ] The regset API documented in defines -ENODEV as the result of the `->active' handler to be used where the feature requested is not available on the hardware found. However code handling core file note generation in `fill_thread_core_info' interpretes any non-zero result from the `->active' handler as the regset requested being active. Consequently processing continues (and hopefully gracefully fails later on) rather than being abandoned right away for the regset requested. Fix the problem then by making the code proceed only if a positive result is returned from the `->active' handler. Signed-off-by: Maciej W. Rozycki Signed-off-by: Paul Burton Fixes: 4206d3aa1978 ("elf core dump: notes user_regset") Patchwork: https://patchwork.linux-mips.org/patch/19332/ Cc: Alexander Viro Cc: James Hogan Cc: Ralf Baechle Cc: linux-fsdevel@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Sasha Levin --- fs/binfmt_elf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 816cc921cf36..efae2fb0930a 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -1751,7 +1751,7 @@ static int fill_thread_core_info(struct elf_thread_core_info *t, const struct user_regset *regset = &view->regsets[i]; do_thread_regset_writeback(t->task, regset); if (regset->core_note_type && regset->get && - (!regset->active || regset->active(t->task, regset))) { + (!regset->active || regset->active(t->task, regset) > 0)) { int ret; size_t size = regset_size(t->task, regset); void *data = kmalloc(size, GFP_KERNEL);