From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 46893C33CB6 for ; Thu, 16 Jan 2020 23:26:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 104532072B for ; Thu, 16 Jan 2020 23:26:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579217196; bh=SQLaG+Rhvxl7OCgsAARRdSQ0xmHBXEP/Q3RysXc5wEo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=I1LATV+xD0dO2TOjLDlGBxHSF+X1Fdnvd2vwtqzSxBCebjTmxw9Z8o0chpn2j3dML MDNH2CZ9aQluMo4lGRiV82t1fqxmn2vOIYRgKNYdRpxyXfZRCe2KzCFI3Png5MGNGg 2YAw5mdhKgXNserMqAjM5BFeDOljxJzpXtBEeftc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388807AbgAPX0f (ORCPT ); Thu, 16 Jan 2020 18:26:35 -0500 Received: from mail.kernel.org ([198.145.29.99]:56518 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388576AbgAPX0L (ORCPT ); Thu, 16 Jan 2020 18:26:11 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 811182073A; Thu, 16 Jan 2020 23:26:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579217171; bh=SQLaG+Rhvxl7OCgsAARRdSQ0xmHBXEP/Q3RysXc5wEo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SwRQBHX7SP+LR/DX0HWFoZLieAuaLChYrWfd7SeLs6bXhFxnWa+GdrEWK67bjKh4L tp003UaiIUTYq37ybNqoaga/gQWPg0nt/YYcSD2JH08HLzpJ/J5j0m4qL9VEyowa3N 6mAAInqlV33mnNhLPPuIU6XV5ZucG7Gcvkvrfr+o= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Chao Yu , Jaegeuk Kim Subject: [PATCH 5.4 176/203] f2fs: fix potential overflow Date: Fri, 17 Jan 2020 00:18:13 +0100 Message-Id: <20200116231759.851132096@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200116231745.218684830@linuxfoundation.org> References: <20200116231745.218684830@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Chao Yu commit 1f0d5c911b64165c9754139a26c8c2fad352c132 upstream. We expect 64-bit calculation result from below statement, however in 32-bit machine, looped left shift operation on pgoff_t type variable may cause overflow issue, fix it by forcing type cast. page->index << PAGE_SHIFT; Fixes: 26de9b117130 ("f2fs: avoid unnecessary updating inode during fsync") Fixes: 0a2aa8fbb969 ("f2fs: refactor __exchange_data_block for speed up") Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim Signed-off-by: Greg Kroah-Hartman --- fs/f2fs/data.c | 2 +- fs/f2fs/file.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -2098,7 +2098,7 @@ static int __write_data_page(struct page loff_t i_size = i_size_read(inode); const pgoff_t end_index = ((unsigned long long) i_size) >> PAGE_SHIFT; - loff_t psize = (page->index + 1) << PAGE_SHIFT; + loff_t psize = (loff_t)(page->index + 1) << PAGE_SHIFT; unsigned offset = 0; bool need_balance_fs = false; int err = 0; --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -1139,7 +1139,7 @@ static int __clone_blkaddrs(struct inode } dn.ofs_in_node++; i++; - new_size = (dst + i) << PAGE_SHIFT; + new_size = (loff_t)(dst + i) << PAGE_SHIFT; if (dst_inode->i_size < new_size) f2fs_i_size_write(dst_inode, new_size); } while (--ilen && (do_replace[i] || blkaddr[i] == NULL_ADDR));