From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758673Ab3KIHOS (ORCPT ); Sat, 9 Nov 2013 02:14:18 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:33298 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932629Ab3KIGv7 (ORCPT ); Sat, 9 Nov 2013 01:51:59 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Colin Ian King , Lars Duesing , Tyler Hicks Subject: [PATCH 3.11 34/94] eCryptfs: fix 32 bit corruption issue Date: Fri, 8 Nov 2013 22:51:40 -0800 Message-Id: <20131109065206.651930839@linuxfoundation.org> X-Mailer: git-send-email 1.8.5.rc0.dirty In-Reply-To: <20131109065204.252462489@linuxfoundation.org> References: <20131109065204.252462489@linuxfoundation.org> User-Agent: quilt/0.60-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.11-stable review patch. If anyone has any objections, please let me know. ------------------ From: Colin Ian King commit 43b7c6c6a4e3916edd186ceb61be0c67d1e0969e upstream. Shifting page->index on 32 bit systems was overflowing, causing data corruption of > 4GB files. Fix this by casting it first. https://launchpad.net/bugs/1243636 Signed-off-by: Colin Ian King Reported-by: Lars Duesing Signed-off-by: Tyler Hicks Signed-off-by: Greg Kroah-Hartman --- fs/ecryptfs/crypto.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/ecryptfs/crypto.c +++ b/fs/ecryptfs/crypto.c @@ -408,7 +408,7 @@ static loff_t lower_offset_for_page(stru struct page *page) { return ecryptfs_lower_header_size(crypt_stat) + - (page->index << PAGE_CACHE_SHIFT); + ((loff_t)page->index << PAGE_CACHE_SHIFT); } /**