Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932219Ab1DMPzz (ORCPT ); Wed, 13 Apr 2011 11:55:55 -0400 Received: from kroah.org ([198.145.64.141]:54412 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758039Ab1DMPzi (ORCPT ); Wed, 13 Apr 2011 11:55:38 -0400 X-Mailbox-Line: From gregkh@clark.kroah.org Wed Apr 13 08:51:47 2011 Message-Id: <20110413155147.243216238@clark.kroah.org> User-Agent: quilt/0.48-16.4 Date: Wed, 13 Apr 2011 08:51:04 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: stable-review@kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Peter Huewe , Marcel Selhorst Subject: [40/74] char/tpm: Fix unitialized usage of data buffer In-Reply-To: <20110413155406.GA22568@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1432 Lines: 41 2.6.32-longterm review patch. If anyone has any objections, please let us know. ------------------ From: Peter Huewe commit 1309d7afbed112f0e8e90be9af975550caa0076b upstream. This patch fixes information leakage to the userspace by initializing the data buffer to zero. Reported-by: Peter Huewe Signed-off-by: Peter Huewe Signed-off-by: Marcel Selhorst [ Also removed the silly "* sizeof(u8)". If that isn't 1, we have way deeper problems than a simple multiplication can fix. - Linus ] Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- drivers/char/tpm/tpm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/char/tpm/tpm.c +++ b/drivers/char/tpm/tpm.c @@ -969,7 +969,7 @@ int tpm_open(struct inode *inode, struct return -EBUSY; } - chip->data_buffer = kmalloc(TPM_BUFSIZE * sizeof(u8), GFP_KERNEL); + chip->data_buffer = kzalloc(TPM_BUFSIZE, GFP_KERNEL); if (chip->data_buffer == NULL) { clear_bit(0, &chip->is_open); put_device(chip->dev); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/