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/*
* 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;
__chk_user_ptr(addr);
return !((addr < limit && size <= limit - addr) ||
is_arch_mappable_range(addr, size));
}
EXPORT_SYMBOL(__range_ok);
void copy_from_user_overflow(void)
{
WARN(1, "Buffer overflow detected!\n");
}
EXPORT_SYMBOL(copy_from_user_overflow);
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