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Miller" , Sasha Levin Subject: [PATCH AUTOSEL for 3.18 065/102] mISDN: Fix a sleep-in-atomic bug Thread-Topic: [PATCH AUTOSEL for 3.18 065/102] mISDN: Fix a sleep-in-atomic bug Thread-Index: AQHTv50gxVbFTVPuOE6UD3oSdmbZCg== Date: Mon, 19 Mar 2018 16:12:50 +0000 Message-ID: <20180319161117.17833-65-alexander.levin@microsoft.com> References: <20180319161117.17833-1-alexander.levin@microsoft.com> In-Reply-To: <20180319161117.17833-1-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;DM5PR2101MB1048;7:i0booekJv3pULmk1rmJDEYHtGOHnHmJsX9SjNLDQkVsJ8uHp38989eCiojXrQEOcFTc/VcN9xl1rAkxZdMkM5sRKvH3rDnDp0F6Tj0JD7fpANb6OqIwCapkzqEtnESQockxVn7Ke7TuIWGXMe+eUWe/GS3SUwXUJDPEIk2h5P9AvWbiZwrCYogOln7Lx1+s10zF9bzNxSsUbndP9CyBbbmjBb3FXLeMUjxgHt5HA5K3tPKGuX3BiScFETQN+LG57;20:90NbKzNbkMfppi+26E7Ta4wBAftn2Et3JN7GozM5q0oxc2Gt5SKI5lmVjd60xH1eUR1X79Iy/aNV2jtoqeBBwiWYWjxiDQOTnIjF4zo1WHXUneSNK5uo7NiaZTiE92UzyIpCOG9uGiUtv5yVXKb0F4qHJoxA+Iok2IaJjz7AzDE= x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: f6e5c67d-7f9f-4766-d229-08d58db45480 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(48565401081)(5600026)(4604075)(3008032)(4534165)(4627221)(201703031133081)(201702281549075)(2017052603328)(7193020);SRVR:DM5PR2101MB1048; x-ms-traffictypediagnostic: DM5PR2101MB1048: authentication-results: spf=none (sender IP is ) smtp.mailfrom=Alexander.Levin@microsoft.com; x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:(28532068793085)(89211679590171)(130843839470238); x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(8211001083)(61425038)(6040522)(2401047)(5005006)(8121501046)(3231221)(944501300)(52105095)(3002001)(93006095)(93001095)(10201501046)(6055026)(61426038)(61427038)(6041310)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(20161123560045)(20161123562045)(20161123564045)(20161123558120)(6072148)(201708071742011);SRVR:DM5PR2101MB1048;BCL:0;PCL:0;RULEID:;SRVR:DM5PR2101MB1048; x-forefront-prvs: 06167FAD59 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(39380400002)(396003)(346002)(39860400002)(366004)(376002)(189003)(199004)(10090500001)(107886003)(25786009)(106356001)(102836004)(26005)(6506007)(8936002)(2906002)(6666003)(186003)(86362001)(2950100002)(5250100002)(66066001)(3280700002)(5660300001)(4326008)(72206003)(68736007)(10290500003)(86612001)(2501003)(478600001)(81156014)(81166006)(8676002)(2900100001)(1076002)(105586002)(6436002)(54906003)(110136005)(53936002)(36756003)(6116002)(59450400001)(3846002)(305945005)(316002)(6512007)(6486002)(14454004)(97736004)(3660700001)(7736002)(76176011)(22452003)(99286004)(22906009)(31853002)(217873001);DIR:OUT;SFP:1102;SCL:1;SRVR:DM5PR2101MB1048;H:DM5PR2101MB1032.namprd21.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A:1; x-microsoft-antispam-message-info: YSCNOBWpLKh3VYy1bjDeZGKAPwyR9IOGsSF2Gi1GBCt6sbNyQLexST9e/PtxHo2vqZMmGdGKtMur+E7vWsUDbOacQb7j6xvsUwkIKP5JweV7nnX29DLSBPvtVu4fKfhMD3b6kgWFRjoqrp9uzK+79qbUnaGOxTmVKGODgn3aOgND6XQjoaCG/t5i1LUITXKql2wJP3U6qeNe3cy2VEZHLklufr7y/rppU7GejgcE5Q6CUnDL72GfiWgz8dorvlZtGwSvmsyo2vglJ9boqOvVcrw5FLUdT+Og9uTwpf9Z/HuVqDZz0VsM3mJwmAu/O9xEqh/J5xvYciNrw1uYT6JVMA== spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: f6e5c67d-7f9f-4766-d229-08d58db45480 X-MS-Exchange-CrossTenant-originalarrivaltime: 19 Mar 2018 16:12:50.4697 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR2101MB1048 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Jia-Ju Bai [ Upstream commit 93818da5eed63fbc17b64080406ea53b86b23309 ] The driver may sleep under a read spin lock, and the function call path is: send_socklist (acquire the lock by read_lock) skb_copy(GFP_KERNEL) --> may sleep To fix it, the "GFP_KERNEL" is replaced with "GFP_ATOMIC". Signed-off-by: Jia-Ju Bai Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/isdn/mISDN/stack.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/isdn/mISDN/stack.c b/drivers/isdn/mISDN/stack.c index 9cb4b621fbc3..b92a19a594a1 100644 --- a/drivers/isdn/mISDN/stack.c +++ b/drivers/isdn/mISDN/stack.c @@ -72,7 +72,7 @@ send_socklist(struct mISDN_sock_list *sl, struct sk_buff = *skb) if (sk->sk_state !=3D MISDN_BOUND) continue; if (!cskb) - cskb =3D skb_copy(skb, GFP_KERNEL); + cskb =3D skb_copy(skb, GFP_ATOMIC); if (!cskb) { printk(KERN_WARNING "%s no skb\n", __func__); break; --=20 2.14.1