Re: System call interposition/unprotecting the table

[Jan Engelhardt]

On Aug 14 2007 21:50, Andi Kleen wrote:
>Hajime Inoue <hinoue@xxxxxxxxxxxxxxxx> writes:
>
>> Just protecting the table does not stop rootkits.  A highly referenced
>> phrack article explains how to bypass the table. 
>
>During .23-pre for some time the kernel text was protected too (that
>would have likely stopped that particular attack), but it was
>removed because it caused too many problems.
>
>Ultimatively it is useless for security anyways because the page
>tables cannot be protected (because there are valid reasons to change
>them).

But with DEBUG_RODATA (does that also apply to .text?) enabled,
accidental writes to it should cause a fault rather than doing silent
changes, would not it?


	Jan
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