From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761608AbXKTS0w (ORCPT ); Tue, 20 Nov 2007 13:26:52 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756187AbXKTSZx (ORCPT ); Tue, 20 Nov 2007 13:25:53 -0500 Received: from pentafluge.infradead.org ([213.146.154.40]:60123 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760639AbXKTSZv (ORCPT ); Tue, 20 Nov 2007 13:25:51 -0500 Date: Tue, 20 Nov 2007 10:23:11 -0800 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: Justin Forbes , Zwane Mwaikambo , "Theodore Ts'o" , Randy Dunlap , Dave Jones , Chuck Wolber , Chris Wedgwood , Michael Krufky , Chuck Ebbert , Domenico Andreoli , torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Jean Delvare Subject: [patch 03/29] i2c/eeprom: Hide Sony Vaio serial numbers Message-ID: <20071120182311.GD28611@kroah.com> References: <20071120181733.702234406@mini.kroah.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline; filename="i2c-eeprom-hide-sony-vaio-serial-numbers.patch" In-Reply-To: <20071120182248.GA28611@kroah.com> User-Agent: Mutt/1.5.16 (2007-06-09) X-Bad-Reply: References and In-Reply-To but no 'Re:' in Subject. Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 2.6.23-stable review patch. If anyone has any objections, please let us know. ------------------ From: Jean Delvare patch 0f2cbd38aa377e30df3b7602abed69464d1970aa in mainline. The sysfs interface to DMI data takes care to not make the system serial number and UUID world-readable, presumably due to privacy concerns. For consistency, we should not let the eeprom driver export these same strings to the world on Sony Vaio laptops. Instead, only make them readable by root, as we already do for BIOS passwords. Signed-off-by: Jean Delvare Signed-off-by: Greg Kroah-Hartman --- drivers/i2c/chips/eeprom.c | 23 +++++++++++++++-------- 1 file changed, 15 insertions(+), 8 deletions(-) --- a/drivers/i2c/chips/eeprom.c +++ b/drivers/i2c/chips/eeprom.c @@ -128,13 +128,20 @@ static ssize_t eeprom_read(struct kobjec for (slice = off >> 5; slice <= (off + count - 1) >> 5; slice++) eeprom_update_client(client, slice); - /* Hide Vaio security settings to regular users (16 first bytes) */ - if (data->nature == VAIO && off < 16 && !capable(CAP_SYS_ADMIN)) { - size_t in_row1 = 16 - off; - in_row1 = min(in_row1, count); - memset(buf, 0, in_row1); - if (count - in_row1 > 0) - memcpy(buf + in_row1, &data->data[16], count - in_row1); + /* Hide Vaio private settings to regular users: + - BIOS passwords: bytes 0x00 to 0x0f + - UUID: bytes 0x10 to 0x1f + - Serial number: 0xc0 to 0xdf */ + if (data->nature == VAIO && !capable(CAP_SYS_ADMIN)) { + int i; + + for (i = 0; i < count; i++) { + if ((off + i <= 0x1f) || + (off + i >= 0xc0 && off + i <= 0xdf)) + buf[i] = 0; + else + buf[i] = data->data[off + i]; + } } else { memcpy(buf, &data->data[off], count); } @@ -208,7 +215,7 @@ static int eeprom_detect(struct i2c_adap if (!memcmp(name, "PCG-", 4) || !memcmp(name, "VGN-", 4)) { dev_info(&new_client->dev, "Vaio EEPROM detected, " - "enabling password protection\n"); + "enabling privacy protection\n"); data->nature = VAIO; } } --