From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:34244 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753373AbdJPQQh (ORCPT ); Mon, 16 Oct 2017 12:16:37 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mateusz S , "Darrick J. Wong" , Theodore Tso Subject: [PATCH 4.9 01/39] ext4: in ext4_seek_{hole,data}, return -ENXIO for negative offsets Date: Mon, 16 Oct 2017 18:15:57 +0200 Message-Id: <20171016161430.044444028@linuxfoundation.org> In-Reply-To: <20171016161429.968555175@linuxfoundation.org> References: <20171016161429.968555175@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Darrick J. Wong commit 1bd8d6cd3e413d64e543ec3e69ff43e75a1cf1ea upstream. In the ext4 implementations of SEEK_HOLE and SEEK_DATA, make sure we return -ENXIO for negative offsets instead of banging around inside the extent code and returning -EFSCORRUPTED. Reported-by: Mateusz S Signed-off-by: Darrick J. Wong Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman --- fs/ext4/file.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -527,7 +527,7 @@ static loff_t ext4_seek_data(struct file inode_lock(inode); isize = i_size_read(inode); - if (offset >= isize) { + if (offset < 0 || offset >= isize) { inode_unlock(inode); return -ENXIO; } @@ -590,7 +590,7 @@ static loff_t ext4_seek_hole(struct file inode_lock(inode); isize = i_size_read(inode); - if (offset >= isize) { + if (offset < 0 || offset >= isize) { inode_unlock(inode); return -ENXIO; }