From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755704Ab0LHAqc (ORCPT ); Tue, 7 Dec 2010 19:46:32 -0500 Received: from kroah.org ([198.145.64.141]:45828 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755078Ab0LHAqa (ORCPT ); Tue, 7 Dec 2010 19:46:30 -0500 X-Mailbox-Line: From gregkh@clark.site Tue Dec 7 16:44:24 2010 Message-Id: <20101208004424.803960336@clark.site> User-Agent: quilt/0.48-11.2 Date: Tue, 07 Dec 2010 16:43:10 -0800 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, Jens Axboe Subject: [004/127] block: check for proper length of iov entries in blk_rq_map_user_iov() In-Reply-To: <20101208004456.GA23578@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2.6.32-stable review patch. If anyone has any objections, please let us know. ------------------ From: Jens Axboe commit 9284bcf4e335e5f18a8bc7b26461c33ab60d0689 upstream. Ensure that we pass down properly validated iov segments before calling into the mapping or copy functions. Reported-by: Dan Rosenberg Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- block/blk-map.c | 2 ++ 1 file changed, 2 insertions(+) --- a/block/blk-map.c +++ b/block/blk-map.c @@ -205,6 +205,8 @@ int blk_rq_map_user_iov(struct request_q unaligned = 1; break; } + if (!iov[i].iov_len) + return -EINVAL; } if (unaligned || (q->dma_pad_mask & len) || map_data)