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=-8.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 840D7C5DF60 for ; Tue, 5 Nov 2019 21:42:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3739521882 for ; Tue, 5 Nov 2019 21:42:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=web.de header.i=@web.de header.b="UXZ+gIvr" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729989AbfKEVm0 (ORCPT ); Tue, 5 Nov 2019 16:42:26 -0500 Received: from mout.web.de ([212.227.15.3]:56159 "EHLO mout.web.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729747AbfKEVm0 (ORCPT ); Tue, 5 Nov 2019 16:42:26 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=web.de; s=dbaedf251592; t=1572990136; bh=eTKu9EhCet3dmCm5fMl3kzNcurmyEyUCoyJuLDVwWj4=; h=X-UI-Sender-Class:Subject:From:To:Cc:References:Date:In-Reply-To; b=UXZ+gIvrdgGTyGNrYsRuKAGrS3T1ztQ49s9NW8BbKMEr4sw7pNXCGAAPdWY6WTdEa ubRG5jfcdm9NqVXllqFhDokWcIICNXARCw/uh9rvKlW7JkCNwo17l1n4TbBF+P8M0U N2IXqB63JetNsyOgaJv+wcat1xf+SzSgrrF29BjQ= X-UI-Sender-Class: c548c8c5-30a9-4db5-a2e7-cb6cb037b8f9 Received: from [192.168.1.2] ([78.48.164.204]) by smtp.web.de (mrweb003 [213.165.67.108]) with ESMTPSA (Nemesis) id 0MFcDF-1ig6o90KBx-00EaJb; Tue, 05 Nov 2019 22:42:16 +0100 Subject: [PATCH 1/2] CIFS: Use memdup_user() rather than duplicating its implementation From: Markus Elfring To: linux-cifs@vger.kernel.org, Ronnie Sahlberg , Ronnie Sahlberg Cc: LKML , kernel-janitors@vger.kernel.org, Aurelien Aptel References: Autocrypt: addr=Markus.Elfring@web.de; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:zVgHY/tLl0DgTUrHlaIsTs+ghIDoq/nAsyESs+m2Vvv6afj9lXY D8pEyCanIRHZkgoI9ZiGjmgl/tc2aHo+ZQtP3DwvsNrjr7OKiUV3+NNBIC9l7eeN9Ynsvjy R6J9RCzyRhpsMIRN7tb1EJ8ckx4KZy9v7sXv74RrKNAV3l0bzNL1DH7T8Hn9Qw24F4za4di FrfouKqwPyzdYR5bv9OiA== X-UI-Out-Filterresults: notjunk:1;V03:K0:zmxHj2FgTwg=:WavkJNZsT5CIYITR1Am806 qd76cDAfyzfuGRSwM9Xn7fLH97qgSZoUR4hNyGVtubpt8eAucb48N+DX8XkG8E9Xt2x09O5l5 dfoWRLpPS07fcfGzbR2P7wvPYNdwRrchQIXkuHtNNl3jfFPjHHyZqGAzHlcyBVmVRpkkVCEct pXBCixMVdcri1lx+ecQUHDh1CS5IaOSlD8qxkhXSl9M5+zCh/XiftD+H9qr6EyBox8aUsiU8V tmichAyJ3QEvPROUSN5WYbmWNd9oiiYor5KHX+AhUJjZt06U+jh9tqlYLxPpkembegiwgbpNN BN72vTyrR+ilTramaL1k26YyLFuljYjpLPjCKn8+H8/IOyhTa5B2yhm5xtRLpU4zDB2zrdcIo IW6eHftD6hQtPF+qfGTcy6trd9rVJOg2ojhcStBUD1/8zyo+GlQ1S+uPftDaDj+NTbbwqzqQW r4z9N2tLGNVdSQY8oM9s/BH/+awRI5LdIpAlt+7pkh4jSi8TsoGe0dwyKsftkJ6qVSqJMXst4 NCeQ/S7CNTQn3gBw538KMEisE8JvXCAxhf0PIXNaduTxGWKkB1oIaoTocI+RkGyF2h6RuIqLG C2g4je0cVz6AZUE5uia3pmdpQKmSr9ewgE2b3xP0jq0Yx5Sx2Icu4r2PZ+RZaQ1bkGm4eIxjm 5qD9Wr4/0PPWzTGTJYU+54v8XgA+uYK3b5dbeC6FmPcp7IQbWO3IUW9NfNMIVjob28jpqzttz 5nlwBeUwzhjZJKVhMlW46EXk5fp6hq4+s+5G5affEnGFhg3XxcxaCjj/uTfr+CDnZWgpwR1zh s5CPpCF6X6hk2JYZHPMZ75ERfWIa7xmgPgM/SJykh8FrKsGuf8a1j8K2ANEWf2YGZDk4Atls5 8ER1tqJAOhyHwuxP6GHfz+JEzGkWJwrVeL2MZypVQLiMs2YqF6rqFaSQxgGsqmp8PwHjJnxHs eDfkm79CjqfxQjw4VmAInFgjowoWv6f2fKyDD/vmnZWx1f3yWMN9J96Q/j9CWjd8X56oZNOUv MN/Z7T685XrEcdV9cD7slwXkFOvak4V487uy9l6QJpNoFBLSMRUV55HsMNB/2CWcnz+8N4dpI LGsObt1+isxA5FTgysQ8NQ6FLPSUhfz3kUZwRcUFWkheP5P6q4hinwbe15e/0lQpXYJDEa+Ec S5X7Aeu1eoeDYwGX6BoeBlkSz7Y7C0i+gWcEHp+FtHZv/bXGosxc0IvM5fXUcwqud12SOn7Xr 2Rpw33Dirrd74dImqnrWGRY/HIdtH7kZwfxMH1G0UmL7qM9dn6+dP20D7TLo= Sender: linux-cifs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org From: Markus Elfring Date: Tue, 5 Nov 2019 21:30:25 +0100 Reuse existing functionality from memdup_user() instead of keeping duplicate source code. Generated by: scripts/coccinelle/api/memdup_user.cocci Fixes: f5b05d622a3e99e6a97a189fe500414be802a05c ("cifs: add IOCTL for QUER= Y_INFO passthrough to userspace") Signed-off-by: Markus Elfring =2D-- fs/cifs/smb2ops.c | 13 ++++--------- 1 file changed, 4 insertions(+), 9 deletions(-) diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index 9cbb0ae0e53e..fde2e6d241a8 100644 =2D-- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -1413,15 +1413,10 @@ smb2_ioctl_query_info(const unsigned int xid, if (smb3_encryption_required(tcon)) flags |=3D CIFS_TRANSFORM_REQ; - buffer =3D kmalloc(qi.output_buffer_length, GFP_KERNEL); - if (buffer =3D=3D NULL) - return -ENOMEM; - - if (copy_from_user(buffer, arg + sizeof(struct smb_query_info), - qi.output_buffer_length)) { - rc =3D -EFAULT; - goto iqinf_exit; - } + buffer =3D memdup_user(arg + sizeof(struct smb_query_info), + qi.output_buffer_length); + if (IS_ERR(buffer)) + return PTR_ERR(buffer); /* Open */ memset(&open_iov, 0, sizeof(open_iov)); =2D- 2.24.0