https://github.com/torvalds/linux
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Tip revision: 0f33be009b89d2268e94194dc4fd01a7851b6d51 authored by Linus Torvalds on 21 September 2014, 22:43:02 UTC
Linux 3.17-rc6
Tip revision: 0f33be0
bug.c
/*
 * Copyright (C) 2006 Jeff Dike (jdike@addtoit.com)
 * Licensed under the GPL V2
 */

#include <linux/uaccess.h>

/*
 * Mostly copied from i386/x86_86 - eliminated the eip < PAGE_OFFSET because
 * that's not relevant in skas mode.
 */

int is_valid_bugaddr(unsigned long eip)
{
	unsigned short ud2;

	if (probe_kernel_address((unsigned short __user *)eip, ud2))
		return 0;

	return ud2 == 0x0b0f;
}
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