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Thu, 8 Mar 2018 00:01:29 -0500 Received: from mail-by2nam01on0096.outbound.protection.outlook.com ([104.47.34.96]:14896 "EHLO NAM01-BY2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S965695AbeCHFBZ (ORCPT ); Thu, 8 Mar 2018 00:01:25 -0500 From: Sasha Levin To: "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" CC: Maor Gottlieb , Leon Romanovsky , Doug Ledford , Sasha Levin Subject: [PATCH AUTOSEL for 4.9 065/190] IB/mlx4: Change vma from shared to private Thread-Topic: [PATCH AUTOSEL for 4.9 065/190] IB/mlx4: Change vma from shared to private Thread-Index: AQHTtpo4E7knJGk5bU2hLfM3Bjm/bw== Date: Thu, 8 Mar 2018 04:59:20 +0000 Message-ID: <20180308045810.8041-65-alexander.levin@microsoft.com> References: <20180308045810.8041-1-alexander.levin@microsoft.com> In-Reply-To: <20180308045810.8041-1-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;DM5PR2101MB0999;7:B9OXxOXpy+T6rJZqpGuVGKkdYDHUwruTgG0Z1syGoMrBhQ7FIQzRqWm8z00j4c2LNXnEyLInV9U9s6J1vKWhtpinJ71y2qHiWniwtWi6YBE4HIvqX/AlDHcIUv10R1Yh3wFoHe76AU0INvBniSxvDkMaTIstPNWnZcoLa8+fFc+z+4lWyfwjLEUoIl8tczGVk2LzmmAQk3ZM3wV61xd3K06PoZ/HG+Q1OTkRM51HxxNiYeldJD4lMvw6rXk8NYlt;20:B8XY6f0feUWe/JFAk9OlZAYVo/PM2ebsA7QL7wQuE+9ZVL4X6UmmU8sRufyJ42TCf75RcwcgWcOaC8V6E3owHmD2iKXkWJxZ++O6SeW91cqfJ3R9Vv5bGnweSR/+s/QHs/wQ/YChsAgOyLOAc6AZ9Bqb1rtTCWWFtX341gHP7wE= x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: 55dca07d-8a0c-4e51-3bb1-08d584b1a281 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(48565401081)(5600026)(4604075)(3008032)(4534165)(4627221)(201703031133081)(201702281549075)(2017052603328)(7193020);SRVR:DM5PR2101MB0999; 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x-microsoft-antispam-message-info: oRpvICi6z+zd5jagPWsoWz6bSfxHTGKloLmV3Ct1cBG1gUydNejlEU0jOoVnkVJEUhS6EdMhCBioFQgjm2SC/FgbIbkBunc+ChrHMnEHA8HRNzug1y1UvrqxIR73DsNOwa4DVtc2uYzyhatqO5ZIcVbwpx9WOR+7rvyoU7XH92Fupiki15muJ2zT55vWr+VcG0wLQ0xPE56j9Rgw6ufwsHZk7i6hFuW6KcQx53rTeNP6rLiUW91G/seNVbIPxcnZmrTz5KpxYdH1dgJDqicHnFgTUkkQh2fSl1It3jXQmIkoyyLLtVc+0HRnNGFT/lpP+QFFxHd2BCCgPt9Emsdvjg== 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: 55dca07d-8a0c-4e51-3bb1-08d584b1a281 X-MS-Exchange-CrossTenant-originalarrivaltime: 08 Mar 2018 04:59:20.5715 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR2101MB0999 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: Maor Gottlieb [ Upstream commit ca37a664a8e4e9988b220988ceb4d79e3316f195 ] Anonymous VMA (->vm_ops =3D=3D NULL) cannot be shared, otherwise it would lead to SIGBUS. Remove the shared flags from the vma after we change it to be anonymous. This is easily reproduced by doing modprobe -r while running a user-space application such as raw_ethernet_bw. Fixes: ae184ddeca5db ('IB/mlx4_ib: Disassociate support') Signed-off-by: Maor Gottlieb Signed-off-by: Leon Romanovsky Signed-off-by: Doug Ledford Signed-off-by: Sasha Levin --- drivers/infiniband/hw/mlx4/main.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4= /main.c index 129dbd790dba..19bc1c2186ff 100644 --- a/drivers/infiniband/hw/mlx4/main.c +++ b/drivers/infiniband/hw/mlx4/main.c @@ -1182,6 +1182,8 @@ static void mlx4_ib_disassociate_ucontext(struct ib_u= context *ibcontext) BUG_ON(1); } =20 + context->hw_bar_info[i].vma->vm_flags &=3D + ~(VM_SHARED | VM_MAYSHARE); /* context going to be destroyed, should not access ops any more */ context->hw_bar_info[i].vma->vm_ops =3D NULL; } --=20 2.14.1