mirror of https://gitee.com/openkylin/linux.git
32 lines
1002 B
C
32 lines
1002 B
C
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/*
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* Copyright 2010 Tilera Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for
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* more details.
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*/
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#include <linux/uaccess.h>
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#include <linux/module.h>
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int __range_ok(unsigned long addr, unsigned long size)
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{
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unsigned long limit = current_thread_info()->addr_limit.seg;
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__chk_user_ptr(addr);
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return !((addr < limit && size <= limit - addr) ||
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is_arch_mappable_range(addr, size));
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}
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EXPORT_SYMBOL(__range_ok);
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void copy_from_user_overflow(void)
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{
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WARN(1, "Buffer overflow detected!\n");
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}
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EXPORT_SYMBOL(copy_from_user_overflow);
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