From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marco Stornelli Subject: [PATCH 18/19] pramfs: test module Date: Sat, 07 Sep 2013 10:33:45 +0200 Message-ID: <522AE4E9.203@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit Cc: Vladimir Davydov , linux-kernel@vger.kernel.org To: Linux FS Devel Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org Add test module. Signed-off-by: Marco Stornelli --- fs/pramfs/pramfs_test.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 47 insertions(+), 0 deletions(-) create mode 100644 fs/pramfs/pramfs_test.c diff --git a/fs/pramfs/pramfs_test.c b/fs/pramfs/pramfs_test.c new file mode 100644 index 0000000..7acfda2 --- /dev/null +++ b/fs/pramfs/pramfs_test.c @@ -0,0 +1,47 @@ +/* + * BRIEF DESCRIPTION + * + * Pramfs test module. + * + * Copyright 2009-2011 Marco Stornelli + * Copyright 2003 Sony Corporation + * Copyright 2003 Matsushita Electric Industrial Co., Ltd. + * 2003-2004 (c) MontaVista Software, Inc. , Steve Longerbeam + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ +#include +#include +#include +#include +#include "pram.h" + +int __init test_pramfs_write(void) +{ + struct pram_super_block *psb; + + psb = get_pram_super(); + if (!psb) { + printk(KERN_ERR + "%s: PRAMFS super block not found (not mounted?)\n", + __func__); + return 1; + } + + /* + * Attempt an unprotected clear of checksum information in the + * superblock, this should cause a kernel page protection fault. + */ + printk("%s: writing to kernel VA %p\n", __func__, psb); + psb->s_sum = 0; + + return 0; +} + +void test_pramfs_write_cleanup(void) {} + +/* Module information */ +MODULE_LICENSE("GPL"); +module_init(test_pramfs_write); +module_exit(test_pramfs_write_cleanup); -- 1.7.3.4