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=-11.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 BFB33C4320E for ; Tue, 10 Aug 2021 20:55:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A0CBF610FE for ; Tue, 10 Aug 2021 20:55:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234352AbhHJUzw (ORCPT ); Tue, 10 Aug 2021 16:55:52 -0400 Received: from mail.kernel.org ([198.145.29.99]:48188 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234556AbhHJUzh (ORCPT ); Tue, 10 Aug 2021 16:55:37 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 42FE561100; Tue, 10 Aug 2021 20:55:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1628628914; bh=lXVCb81Ds/VdhoshPZIHAlr3P7ZKsCBLDSx3SIJXrYw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=BdC54j871H68/YQ2QalAxXiBsMwC6eUDQufRWlDZava2qtmjEG5DsLAyHE6lJK0vE gvQfwIrqjeIcp6/mxTlmi4vemk6rtmohIEmjZsSzX4ju+0SOjd1DwCi+Qh/S3g5jKP K8YicFnZaXBTmrgA0TQv8pEjH2ozaN8+aAVLrrSpqoDqTeod0NaatkdrLViIepGUc6 Q5r1JLOV+5c0/6a/uxV0yXtd16BFDoOYVQ1ySiZrowCq1nzFlrBf5JZgI9dsBbcK16 u70Z/s1QFUq1DOe6h5TqGn+9RlzzfgpWjqok17FXe38EEUTEIeRa1uaqVCacAZsM0R wp8Y7pjs2mbVw== Date: Tue, 10 Aug 2021 22:55:11 +0200 From: Wolfram Sang To: Greg Kroah-Hartman Cc: linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, Eric Dumazet , Dan Carpenter , stable Subject: Re: [PATCH v2] i2c: dev: zero out array used for i2c reads from userspace Message-ID: Mail-Followup-To: Wolfram Sang , Greg Kroah-Hartman , linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, Eric Dumazet , Dan Carpenter , stable References: <20210729143532.47240-1-gregkh@linuxfoundation.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="9Swibbr0MaEeP+pe" Content-Disposition: inline In-Reply-To: <20210729143532.47240-1-gregkh@linuxfoundation.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --9Swibbr0MaEeP+pe Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Jul 29, 2021 at 04:35:32PM +0200, Greg Kroah-Hartman wrote: > If an i2c driver happens to not provide the full amount of data that a > user asks for, it is possible that some uninitialized data could be sent > to userspace. While all in-kernel drivers look to be safe, just be sure > by initializing the buffer to zero before it is passed to the i2c driver > so that any future drivers will not have this issue. >=20 > Also properly copy the amount of data recvieved to the userspace buffer, > as pointed out by Dan Carpenter. >=20 > Reported-by: Eric Dumazet > Cc: Dan Carpenter > Cc: stable > Signed-off-by: Greg Kroah-Hartman Fixed checkpatch warning "WARNING: Invalid email format for stable: 'stable ', prefer 'stable@vger.kernel.org' " and applied to for-current, thanks! --9Swibbr0MaEeP+pe Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAmES568ACgkQFA3kzBSg KbYTXhAAlT/K3AtvhsnMS3vwbfA+wSr0BYsT6io4lLdFK7t1KZbtTiH08jhSWe0Z nZrWxmgCGmQ0zHTDJslFzZz2LtuLE/rhSDqz/pW5l1rKfkOSdeATwmvoU/COZ30i O0Gx9DYR/BFANzOEJa8OGApuGeloah6X/5JDRDCZbqU2ZoLPFzJumkQxk4TesLBq QwrMXWhl5hsuccfEeEVOuyqpXqkNDCnVgqK1MFqAGawQvMlbiYa5wbn5PR0VKAO0 IVzz9YLIP+fxyssk0IA1NxiJn5aIqVjlW2wfX5Tu3yT8lJAH/11i3MNfwzMO/XvS 7IMr00AafqQkAi6ZRvRpn9G0wWL5twuv+weOuJsDgYqyGGX0KWAugEV9PibSV5n3 4+b8Yb70kwQvAFOz19nBUlIDchVh1Wm8svMJSZO78CGeXmQZLbDfomB0Gvfpjhb8 hsMzl4SNBqvywRVFqtbj9mVDCjtyMyKNZfY9OOo67mT7PcNPhXUJS/xRmP697oom 2/l/Iq07xP54i1gEMLhZcNAChJFOXeKbCzL3z/qduvhgbLyXHzwK8wa9jDizk8Ez cJ8/nFqa3c9KPrbzst8ql7RNNNHu3DfPslw7rvI52/s8Uqk3Y3DRh5/x9qC6V0j6 N3Awz9C1CFixVkwGbtzcwd3WKOzglqf9X2nd93yQrX2S9Ldry7s= =8fOf -----END PGP SIGNATURE----- --9Swibbr0MaEeP+pe--