From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756031Ab0CQT7P (ORCPT ); Wed, 17 Mar 2010 15:59:15 -0400 Received: from cantor.suse.de ([195.135.220.2]:58148 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751821Ab0CQT7M (ORCPT ); Wed, 17 Mar 2010 15:59:12 -0400 Message-ID: <4BA1348E.9070201@suse.com> Date: Wed, 17 Mar 2010 15:59:10 -0400 From: Jeff Mahoney Organization: SUSE Labs, Novell, Inc User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.8) Gecko/20100228 SUSE/3.0.3-1.3 Thunderbird/3.0.3 MIME-Version: 1.0 To: ReiserFS Mailing List Cc: Linux Kernel Mailing List , Andrew Morton Subject: [PATCH 1/2] reiserfs: fix oops while creating privroot with selinux enabled X-Enigmail-Version: 1.0.1 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit 57fe60df contains a bug that will cause it to oops when mounting a file system that didn't previously contain extended attributes on a system using security.* xattrs. The issue is that while creating the privroot during mount reiserfs_security_init calls reiserfs_xattr_jcreate_nblocks which dereferences the xattr root. The xattr root doesn't exist, so we get an oops. This fixes http://bugzilla.kernel.org/show_bug.cgi?id=15309 Signed-off-by: Jeff Mahoney --- fs/reiserfs/xattr_security.c | 2 +- include/linux/reiserfs_xattr.h | 5 +++++ 2 files changed, 6 insertions(+), 1 deletion(-) --- a/fs/reiserfs/xattr_security.c +++ b/fs/reiserfs/xattr_security.c @@ -76,7 +76,7 @@ int reiserfs_security_init(struct inode return error; } - if (sec->length) { + if (sec->length && reiserfs_xattrs_initialized(inode->i_sb)) { blocks = reiserfs_xattr_jcreate_nblocks(inode) + reiserfs_xattr_nblocks(inode, sec->length); /* We don't want to count the directories twice if we have --- a/include/linux/reiserfs_xattr.h +++ b/include/linux/reiserfs_xattr.h @@ -70,6 +70,11 @@ int reiserfs_security_write(struct reise void reiserfs_security_free(struct reiserfs_security_handle *sec); #endif +static inline int reiserfs_xattrs_initialized(struct super_block *sb) +{ + return REISERFS_SB(sb)->priv_root != NULL; +} + #define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header)) static inline loff_t reiserfs_xattr_nblocks(struct inode *inode, loff_t size) { -- Jeff Mahoney SUSE Labs