From patchwork Mon Jun 24 21:46:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Colin King X-Patchwork-Id: 11014191 X-Patchwork-Delegate: jgg@ziepe.ca 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 F1D8214E5 for ; Mon, 24 Jun 2019 21:46:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E118928A45 for ; Mon, 24 Jun 2019 21:46:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D4D5B28B3E; Mon, 24 Jun 2019 21:46:22 +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=-7.9 required=2.0 tests=BAYES_00,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 7024E28A45 for ; Mon, 24 Jun 2019 21:46:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732358AbfFXVqS (ORCPT ); Mon, 24 Jun 2019 17:46:18 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:53993 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727855AbfFXVqQ (ORCPT ); Mon, 24 Jun 2019 17:46:16 -0400 Received: from 1.general.cking.uk.vpn ([10.172.193.212] helo=localhost) by youngberry.canonical.com with esmtpsa (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.76) (envelope-from ) id 1hfWmv-00068c-40; Mon, 24 Jun 2019 21:46:09 +0000 From: Colin King To: Lijun Ou , Wei Hu , Doug Ledford , Jason Gunthorpe , linux-rdma@vger.kernel.org Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH][next] RDMA/hns: fix potential integer overflow on left shift Date: Mon, 24 Jun 2019 22:46:08 +0100 Message-Id: <20190624214608.11765-1-colin.king@canonical.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Colin Ian King There is a potential integer overflow when int i is left shifted as this is evaluated using 32 bit arithmetic but is being used in a context that expects an expression of type dma_addr_t. Fix this by casting integer i to dma_addr_t before shifting to avoid the overflow. Addresses-Coverity: ("Unintentional integer overflow") Fixes: 2ac0bc5e725e ("RDMA/hns: Add a group interfaces for optimizing buffers getting flow") Signed-off-by: Colin Ian King --- drivers/infiniband/hw/hns/hns_roce_alloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/hns/hns_roce_alloc.c b/drivers/infiniband/hw/hns/hns_roce_alloc.c index 14fcc359599c..2c8defa94107 100644 --- a/drivers/infiniband/hw/hns/hns_roce_alloc.c +++ b/drivers/infiniband/hw/hns/hns_roce_alloc.c @@ -257,7 +257,7 @@ int hns_roce_get_kmem_bufs(struct hns_roce_dev *hr_dev, dma_addr_t *bufs, for (i = start; i < end; i++) if (buf->nbufs == 1) bufs[total++] = buf->direct.map + - (i << buf->page_shift); + ((dma_addr_t)i << buf->page_shift); else bufs[total++] = buf->page_list[i].map;