2010-11-06 09:04:22

by Marco Stornelli

Subject: [PATCH 15/16 v2] pramfs: test module

From: Marco Stornelli <[email protected]>

Test module.

Signed-off-by: Marco Stornelli <[email protected]>
---
diff -Nurp linux-2.6.36-orig/fs/pramfs/pramfs_test.c linux-2.6.36/fs/pramfs/pramfs_test.c
--- linux-2.6.36-orig/fs/pramfs/pramfs_test.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.36/fs/pramfs/pramfs_test.c 2010-09-14 18:49:52.000000000 +0200
@@ -0,0 +1,49 @@
+/*
+ * FILE NAME fs/pramfs/namei.c
+ *
+ * BRIEF DESCRIPTION
+ *
+ * Pramfs test module.
+ *
+ * Copyright 2009-2010 Marco Stornelli <[email protected]>
+ * 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 <linux/module.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#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);

2010-11-06 15:50:45

by Randy Dunlap

Subject: Re: [PATCH 15/16 v2] pramfs: test module

On Sat, 06 Nov 2010 10:01:12 +0100 Marco Stornelli wrote:

> From: Marco Stornelli <[email protected]>
>
> Test module.
>
> Signed-off-by: Marco Stornelli <[email protected]>
> ---
> diff -Nurp linux-2.6.36-orig/fs/pramfs/pramfs_test.c linux-2.6.36/fs/pramfs/pramfs_test.c
> --- linux-2.6.36-orig/fs/pramfs/pramfs_test.c 1970-01-01 01:00:00.000000000 +0100
> +++ linux-2.6.36/fs/pramfs/pramfs_test.c 2010-09-14 18:49:52.000000000 +0200
> @@ -0,0 +1,49 @@
> +/*
> + * FILE NAME fs/pramfs/namei.c
> + *
> + * BRIEF DESCRIPTION
> + *
> + * Pramfs test module.


Wrong FILE NAME. Better to just omit it completely.

---
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***