Re: [RFC] syscalls, x86: Add __NR_kcmp syscall

[H. Peter Anvin]

On 01/17/2012 06:44 AM, Cyrill Gorcunov wrote:
> On Tue, Jan 17, 2012 at 04:38:14PM +0200, Alexey Dobriyan wrote:
>> On 1/17/12, Cyrill Gorcunov <gorcunov@xxxxxxxxx> wrote:
>>> +#define KCMP_EQ		0
>>> +#define KCMP_LT		1
>>> +#define KCMP_GT		2
>>
>> LT and GT are meaningless.
>>
> 
> I found symbolic names better than open-coded values. But sure,
> if this is problem it could be dropped.
> 
> Or you mean that in general anything but 'equal' is useless?
> 

Why on Earth would user space need to know which order in memory certain
kernel objects are?

Keep in mind that this is *exactly* the kind of information which makes
rootkits easier.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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