Re: [PATCH v4] [x86] detect and report lack of NX protections

[H. Peter Anvin]

On 11/10/2009 08:57 AM, Kees Cook wrote:
> 
> 64-bit does not set nx_enabled to "1" by default anywhere.  And setting
> the default to 1 in check_efer() seemed out of place to me.
> 

If it doesn't set nx_enabled anywhere, you'll end up with the message

+	printk(KERN_NOTICE "Notice: NX (Execute Disable) protection "
+	       "missing in CPU or disabled in BIOS!\n");

which seems obviously wrong... no?

	-hpa

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

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