From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:59134 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762795AbdDSMer (ORCPT ); Wed, 19 Apr 2017 08:34:47 -0400 Subject: Patch "ext4: fix inode checksum calculation problem if i_extra_size is small" has been added to the 4.9-stable tree To: daeho.jeong@samsung.com, darrick.wong@oracle.com, gregkh@linuxfoundation.org, nix@esperi.org.uk, tytso@mit.edu, youngjin.gil@samsung.com Cc: , From: Date: Wed, 19 Apr 2017 14:34:15 +0200 Message-ID: <149260525510070@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled ext4: fix inode checksum calculation problem if i_extra_size is small to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: ext4-fix-inode-checksum-calculation-problem-if-i_extra_size-is-small.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 05ac5aa18abd7db341e54df4ae2b4c98ea0e43b7 Mon Sep 17 00:00:00 2001 From: Daeho Jeong Date: Thu, 1 Dec 2016 11:49:12 -0500 Subject: ext4: fix inode checksum calculation problem if i_extra_size is small From: Daeho Jeong commit 05ac5aa18abd7db341e54df4ae2b4c98ea0e43b7 upstream. We've fixed the race condition problem in calculating ext4 checksum value in commit b47820edd163 ("ext4: avoid modifying checksum fields directly during checksum veficationon"). However, by this change, when calculating the checksum value of inode whose i_extra_size is less than 4, we couldn't calculate the checksum value in a proper way. This problem was found and reported by Nix, Thank you. Reported-by: Nix Signed-off-by: Daeho Jeong Signed-off-by: Youngjin Gil Signed-off-by: Darrick J. Wong Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman --- fs/ext4/inode.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -71,10 +71,9 @@ static __u32 ext4_inode_csum(struct inod csum = ext4_chksum(sbi, csum, (__u8 *)&dummy_csum, csum_size); offset += csum_size; - csum = ext4_chksum(sbi, csum, (__u8 *)raw + offset, - EXT4_INODE_SIZE(inode->i_sb) - - offset); } + csum = ext4_chksum(sbi, csum, (__u8 *)raw + offset, + EXT4_INODE_SIZE(inode->i_sb) - offset); } return csum; Patches currently in stable-queue which might be from daeho.jeong@samsung.com are queue-4.9/ext4-fix-inode-checksum-calculation-problem-if-i_extra_size-is-small.patch