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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: 6feAIxQRZHMZHBIGpqj/2iZxhhgC1oeX+cml+OPlt4tDOAUwIPRenYsWPZZP9JbsDKEOoAzRRO8SuNy/nPIfGhDD6D0fsC34131y+SIMmxiAKE9kLU+svc6/d0rWp0W+OIAWK9dlgZPpj+dKHQc/+ZJv/OsUbaKlk8ekcu3xTgh+RBUQCSLVxrdSJLMrHu5k7hL/PcpC4MQakFxiWV1+r8cIFMMBIP38bqHqLaO6jk2jD/+xBImhHIOhJNdSuhr+eWcgZvdrdLp/sKXUWcNo7bbylC5AJhsaJj8aUnKHHUu7ULAqBym+znOlldbxMqPHavpGLMR37uLxVCAPKPsUBDxuEzW7AzM5B/rrj8tB/rk= 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: b144d5fd-4b40-40d7-8f8d-08d61c4a29c1 X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Sep 2018 03:02:37.2750 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR21MB0470 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 b7961f21b555..39398dd074d6 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_verbs.c +++ b/drivers/infiniband/hw/i40iw/i40iw_verbs.c @@ -1408,6 +1408,7 @@ 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); @@ -1416,6 +1417,7 @@ 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