From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8306913B7AE for ; Fri, 10 May 2024 03:33:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715312027; cv=none; b=Q5RGpD14q5KMY57Vum2a7myrOcHKpviafatwCeuQCKG7rq8pcMNXWVdpsDCxqpJ3Zrq77mySsKiH5yK5YDvJPQUm0xfc+kcsR3++CN7ucZiMBkWK37LBayHpZ4F5z9LJfimWCCwxQdxMS7+gycjnbLQJmNCNu4qZoEivuHmmu24= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715312027; c=relaxed/simple; bh=tQCU8a3DiAlPU9cV1Yzc3NpKh9FJk5rB1BHhgkRcW64=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=Ctp9W4Q+2zqCvYa65ZLUc91vj3HuOdT5cPh2eS5uQ1Zpdxwn/FoBvjgzSNtbzDF2y5wCiwPxTiwbVoG0mMqR5W23E42vCVt+L86ITP30xVW2RDwvgZXh/lRYT/lMxu+Kq55j3AAkEqJTwq0Z/w4zWR9zsH1ZFvVhwpJcbq9171I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=FPvQG7uC; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="FPvQG7uC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C06D3C116B1; Fri, 10 May 2024 03:33:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1715312027; bh=tQCU8a3DiAlPU9cV1Yzc3NpKh9FJk5rB1BHhgkRcW64=; h=From:To:Cc:Subject:Date:From; b=FPvQG7uCqrunIi2zYYEK8kQmFI7UgEMMeCKgSwnzRcOiqBZZf3wbPvmYJ6pkhPDWP A6EbyQBemc961bNMTu+nxSQMfyyzJc/7fsjmWKfQspdiUzLNEO/xMPjIGJL+jootOU EmtHGd9QtVHTIFRan5C/+O6HVZDqnAtdNx1mE9UfoUiEf9mtNKvC+CA1V19311wxX/ B/3Yh1KFQqKElwZJvAdKK5w9Bw89hgqkhUcbtw19OQglD2kgoaSsF2UGgrOOHU3N4/ fr4B79W88VAwq5uLScMOOTfH1eoBqFyEVwHylGCKBOjXK7AL3fhMOvKAE8uWf5zMeS /wO1VlIjqB2ZQ== From: Chao Yu To: jaegeuk@kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Chao Yu Subject: [PATCH v3 5/5] f2fs: compress: don't allow unaligned truncation on released compress inode Date: Fri, 10 May 2024 11:33:39 +0800 Message-Id: <20240510033339.300331-1-chao@kernel.org> X-Mailer: git-send-email 2.40.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit f2fs image may be corrupted after below testcase: - mkfs.f2fs -O extra_attr,compression -f /dev/vdb - mount /dev/vdb /mnt/f2fs - touch /mnt/f2fs/file - f2fs_io setflags compression /mnt/f2fs/file - dd if=/dev/zero of=/mnt/f2fs/file bs=4k count=4 - f2fs_io release_cblocks /mnt/f2fs/file - truncate -s 8192 /mnt/f2fs/file - umount /mnt/f2fs - fsck.f2fs /dev/vdb [ASSERT] (fsck_chk_inode_blk:1256) --> ino: 0x5 has i_blocks: 0x00000002, but has 0x3 blocks [FSCK] valid_block_count matching with CP [Fail] [0x4, 0x5] [FSCK] other corrupted bugs [Fail] The reason is: partial truncation assume compressed inode has reserved blocks, after partial truncation, valid block count may change w/o .i_blocks and .total_valid_block_count update, result in corruption. This patch only allow cluster size aligned truncation on released compress inode for fixing. Fixes: c61404153eb6 ("f2fs: introduce FI_COMPRESS_RELEASED instead of using IMMUTABLE bit") Signed-off-by: Chao Yu --- v3: - fix typo in commit description: w/ -> w/o fs/f2fs/file.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 7371f485b3f7..15f4222da891 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -952,9 +952,14 @@ int f2fs_setattr(struct mnt_idmap *idmap, struct dentry *dentry, ATTR_GID | ATTR_TIMES_SET)))) return -EPERM; - if ((attr->ia_valid & ATTR_SIZE) && - !f2fs_is_compress_backend_ready(inode)) - return -EOPNOTSUPP; + if ((attr->ia_valid & ATTR_SIZE)) { + if (!f2fs_is_compress_backend_ready(inode)) + return -EOPNOTSUPP; + if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED) && + !IS_ALIGNED(attr->ia_size, + F2FS_BLK_TO_BYTES(F2FS_I(inode)->i_cluster_size))) + return -EINVAL; + } err = setattr_prepare(idmap, dentry, attr); if (err) -- 2.40.1