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Mon, 17 Sep 2018 03:00:31 +0000 Received: from CY4PR21MB0776.namprd21.prod.outlook.com ([fe80::54e2:88e0:b622:b36]) by CY4PR21MB0776.namprd21.prod.outlook.com ([fe80::54e2:88e0:b622:b36%5]) with mapi id 15.20.1185.003; Mon, 17 Sep 2018 03:00:31 +0000 From: Sasha Levin To: "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: Leon Romanovsky , Jason Gunthorpe , Sasha Levin Subject: [PATCH AUTOSEL 4.18 030/136] RDMA/i40w: Hold read semaphore while looking after VMA Thread-Topic: [PATCH AUTOSEL 4.18 030/136] RDMA/i40w: Hold read semaphore while looking after VMA Thread-Index: AQHUTjKYYBbULfqBBECc0DyDObwFXA== Date: Mon, 17 Sep 2018 03:00:31 +0000 Message-ID: <20180917030006.245495-30-alexander.levin@microsoft.com> References: <20180917030006.245495-1-alexander.levin@microsoft.com> In-Reply-To: <20180917030006.245495-1-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;CY4PR21MB0629;6:KcAemVv4Tf2qjsTyzXtza9RTTfs+mzUN4koxc303A4oLi6eaDR19FyisS7iPmEFWiWp+kJa4gXgQey6uT10SdkjaD7NhNEigxIqx07z3ViQUxY2ZxaWXh4rGINxzWI1Ro2U5JY4dygFDu+jfBo9LfQyTJTJG+asdv1IL+T1Kth9gH2h58dF5Boq/VVMuBUAp12nPHot/mFwhpV+ZoxQ1iCN57Jsn3LU00fQ9Ir49prPe2I56Bo4qlY/hsl2KDYZitF1gBuTuOLAL3GYZeNkYHZQSoIkxx1C6SJh1XDQVzGffoUbrs1Mg6wW62R+aobtUwau4hqBvnSnBsn2LXoiksZV+QAdj4XXJg6V74ykrPt1Agj/oseVYt/Kg4zXccYey6jldKaKKi6hr7L9sXMbRczQ4qS0CF+RW81vp4SzJ9W679cXQHlWfPXMBZm2esNnZ71gbKg/OF6UwhB10n1zIKA==;5:qhS68SLE31ba9EkwUNN/rCCp5RIfXrvKTTePm634QdBxO2EYpmRGjvSbr7yzODdePK1UDngJt7Tqdw+dlWZCekD5ENkhgqBDT74Egqm5WAaxAtVYj4+1o523YxyDIlrJ+zCfwqPNi86dPcK4IEI+0FByLoa7awlkhZEtXOXtFJQ=;7:8VwEKxCmYkAUFsV2LmsgkMXXRwIPmbnOXVbIeIgmrCts9e3mboXxFxSKTNsRsTusQFJd4e4JMJiM4gNf/Hllbyf/qViswlfmZZbU7eAVFC5dULYNNXTCc1N2ZA/rYJAV0zUuwnhFJfJIMoq/K/sdEpyPiC+VD41a9j3QkQ2rDMQhblO+9hV8/wz505NhUELO5TgqlG6Tu0cNRyS0BoNe3bhVxzcNxW9ceVT9uV2/mApnahGtTrXLB/5oOWywF4sv x-ms-office365-filtering-correlation-id: 52d7eb16-3336-4e88-3dd8-08d61c49baf5 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:CY4PR21MB0629; 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received-spf: None (protection.outlook.com: microsoft.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: wfGHvbQDy06+ZwCYqEKD7Eccm84GkIOIPjHq0W4+IF8vzZlJGqTjSV3T704sHo9JT6J3caUR6Q+5vgacHz8KlpTpoLMe6upd3YytoFbcVCBFR7TL5ESTz4LR4t2456vTsxYSFyhdbo1YIi73AujmMzDxXeukISKwiAEZPIAZGQSLv/VGKA7joEGlNLMfUWaHedGBzDq4rEm01lgyVFEcqZaFYUDw7Z/v/uv499e2ZtCcUnJ5807K0lvppvoETP14lHL62Jqa/NeE+X783CkUlbL3/fHdoVk8IaWMDZ/TEzJXQHyRSDTZYMBveK3PVcbYBROiJ3oI9qbUQH/hIiR2pUwi5n/Jz5W4klM0631Vg60= 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: 52d7eb16-3336-4e88-3dd8-08d61c49baf5 X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Sep 2018 03:00:31.0734 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR21MB0629 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Leon Romanovsky [ Upstream commit 5d9a2b0e28759e319a623da33940dbb3ce952b7d ] VMA lookup is supposed to be performed while mmap_sem is held. Fixes: f26c7c83395b ("i40iw: Add 2MB page support") Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe Signed-off-by: Sasha Levin --- drivers/infiniband/hw/i40iw/i40iw_verbs.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/infiniband/hw/i40iw/i40iw_verbs.c b/drivers/infiniband= /hw/i40iw/i40iw_verbs.c index 68679ad4c6da..937899fea01d 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_verbs.c +++ b/drivers/infiniband/hw/i40iw/i40iw_verbs.c @@ -1409,6 +1409,7 @@ static void i40iw_set_hugetlb_values(u64 addr, struct= i40iw_mr *iwmr) struct vm_area_struct *vma; struct hstate *h; =20 + down_read(¤t->mm->mmap_sem); vma =3D find_vma(current->mm, addr); if (vma && is_vm_hugetlb_page(vma)) { h =3D hstate_vma(vma); @@ -1417,6 +1418,7 @@ static void i40iw_set_hugetlb_values(u64 addr, struct= i40iw_mr *iwmr) iwmr->page_msk =3D huge_page_mask(h); } } + up_read(¤t->mm->mmap_sem); } =20 /** --=20 2.17.1