blob: f8d398c9ee7f3e174b70d94648db32d7500b2e80 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
/*
* Copyright 2010 Tilera Corporation. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for
* more details.
*/
#include <linux/uaccess.h>
#include <linux/module.h>
int __range_ok(unsigned long addr, unsigned long size)
{
unsigned long limit = current_thread_info()->addr_limit.seg;
return !((addr < limit && size <= limit - addr) ||
is_arch_mappable_range(addr, size));
}
EXPORT_SYMBOL(__range_ok);
#ifdef CONFIG_DEBUG_COPY_FROM_USER
void copy_from_user_overflow(void)
{
WARN(1, "Buffer overflow detected!\n");
}
EXPORT_SYMBOL(copy_from_user_overflow);
#endif
|
