From patchwork Sun Oct 4 18:04:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 11815729 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DBE561580 for ; Sun, 4 Oct 2020 18:04:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BE31E206B6 for ; Sun, 4 Oct 2020 18:04:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="b/hQUZP8" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726521AbgJDSEk (ORCPT ); Sun, 4 Oct 2020 14:04:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48776 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726125AbgJDSEj (ORCPT ); Sun, 4 Oct 2020 14:04:39 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9DF29C0613CE; Sun, 4 Oct 2020 11:04:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=lcDrPyve8ZGqJ4GdFbmYERQ0EctUPUpm2VwVCWrS8pU=; b=b/hQUZP816I2ZPcyTtYJrK0hPU eTT6yKyUGxFh7cmzFamPce4SyXe30LGUt/w2KAnHF4rWLPsDPz8qLwoSZihNO4XGJ225/rAL9xCPp eJT3Hw5qpYqLVINHcgEZEPjKCvuMYoTcdJp3VKRm2OVr4YjlY4vrGvPOuWRnw9PHt32Bp//fi7Dzb PvCfP5kaSZXNQAoYhUAtkkrE3t1AzsweMP5UROoIeF71zOfo1kQoHfYts7prtHfRLVFCx2/hKVDuy S70qOhDWnAi0pZzDyNBy4V2Ivu9/nA75VcvlC/styaN6bzFWKDrsAystUNHqLn6AHosJiPwxNLG5K sMNpzx4g==; Received: from willy by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kP8N5-0003mY-6K; Sun, 04 Oct 2020 18:04:31 +0000 From: "Matthew Wilcox (Oracle)" To: linux-fsdevel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , ericvh@gmail.com, lucho@ionkov.net, viro@zeniv.linux.org.uk, jlayton@kernel.org, idryomov@gmail.com, mark@fasheh.com, jlbec@evilplan.org, joseph.qi@linux.alibaba.com, v9fs-developer@lists.sourceforge.net, linux-kernel@vger.kernel.org, ceph-devel@vger.kernel.org, ocfs2-devel@oss.oracle.com, linux-btrfs@vger.kernel.org, clm@fb.com, josef@toxicpanda.com, dsterba@suse.com, stable@vger.kernel.org Subject: [PATCH 1/7] 9P: Cast to loff_t before multiplying Date: Sun, 4 Oct 2020 19:04:22 +0100 Message-Id: <20201004180428.14494-2-willy@infradead.org> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20201004180428.14494-1-willy@infradead.org> References: <20201004180428.14494-1-willy@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On 32-bit systems, this multiplication will overflow for files larger than 4GB. Cc: stable@vger.kernel.org Fixes: fb89b45cdfdc ("9P: introduction of a new cache=mmap model.") Signed-off-by: Matthew Wilcox (Oracle) --- fs/9p/vfs_file.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c index 3576123d8299..6d97b6b4d34b 100644 --- a/fs/9p/vfs_file.c +++ b/fs/9p/vfs_file.c @@ -612,9 +612,9 @@ static void v9fs_mmap_vm_close(struct vm_area_struct *vma) struct writeback_control wbc = { .nr_to_write = LONG_MAX, .sync_mode = WB_SYNC_ALL, - .range_start = vma->vm_pgoff * PAGE_SIZE, + .range_start = (loff_t)vma->vm_pgoff * PAGE_SIZE, /* absolute end, byte at end included */ - .range_end = vma->vm_pgoff * PAGE_SIZE + + .range_end = (loff_t)vma->vm_pgoff * PAGE_SIZE + (vma->vm_end - vma->vm_start - 1), };