From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6780AC197BF for ; Fri, 4 Dec 2020 01:24:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 34FE4224B1 for ; Fri, 4 Dec 2020 01:24:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731978AbgLDBX6 (ORCPT ); Thu, 3 Dec 2020 20:23:58 -0500 Received: from szxga04-in.huawei.com ([45.249.212.190]:8632 "EHLO szxga04-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726028AbgLDBX6 (ORCPT ); Thu, 3 Dec 2020 20:23:58 -0500 Received: from DGGEMS405-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4CnFLq3fcvz15N2P; Fri, 4 Dec 2020 09:22:43 +0800 (CST) Received: from localhost.localdomain (10.69.192.56) by DGGEMS405-HUB.china.huawei.com (10.3.19.205) with Microsoft SMTP Server id 14.3.487.0; Fri, 4 Dec 2020 09:23:05 +0800 From: Tian Tao To: , , , , , , , , Subject: [PATCH] drm/nouveau: Use vmemdup_user() Date: Fri, 4 Dec 2020 09:23:12 +0800 Message-ID: <1607044999-47666-7-git-send-email-tiantao6@hisilicon.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1607044999-47666-1-git-send-email-tiantao6@hisilicon.com> References: <1607044999-47666-1-git-send-email-tiantao6@hisilicon.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.69.192.56] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Replace alloc and copy with vmemdup_user() Signed-off-by: Tian Tao --- drivers/gpu/drm/nouveau/nouveau_gem.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c index 787d05e..df986d9 100644 --- a/drivers/gpu/drm/nouveau/nouveau_gem.c +++ b/drivers/gpu/drm/nouveau/nouveau_gem.c @@ -591,14 +591,9 @@ u_memcpya(uint64_t user, unsigned nmemb, unsigned size) size *= nmemb; - mem = kvmalloc(size, GFP_KERNEL); - if (!mem) - return ERR_PTR(-ENOMEM); - - if (copy_from_user(mem, userptr, size)) { - u_free(mem); - return ERR_PTR(-EFAULT); - } + mem = vmemdup_user(userptr, size); + if (IS_ERR(mem)) + return ERR_CAST(mem); return mem; } -- 2.7.4