Re: [patch 1/3] x86, cpa: fix kernel text RO checks instatic_protection()

[Steven Rostedt]

On Wed, 2009-10-28 at 18:46 -0800, Suresh Siddha wrote:
> plain text document attachment (fix_cpa_check.patch)
> Steven Rostedt reported that we are unconditionally making the
> kernel text mapping as read-only. i.e., if someone does cpa() to the
> kernel text area for setting/clearing any page table attribute, we
> unconditionally clear the read-write attribute for the kernel text mapping
> that is set at compile time.
> 
> We should delay (to forbid the write attribute) and enforce only after the
> kernel has mapped the text as read-only.
> 
> Reported-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
> Signed-off-by: Suresh Siddha <suresh.b.siddha@xxxxxxxxx>

Heh, I wrote an almost identical patch myself. It would have been exact,
but I did not make the comment change ;-)

Acked-by: Steven Rostedt <rostedt@xxxxxxxxxxx>

-- Steve


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