Re: [PATCH V5] x86: NX protection for kernel data

From: Siarhei Liakh
Date: Tue Oct 13 2009 - 07:37:31 EST


>> I like doing this, but... maybe it is useful to have a diff of the
>> pagetable dump (PT_DUMP config option) to show the effect, in the
>> changelog. That'd be like the proof on the pudding...
>
> That's a good suggestion. Siarhei Liakh, mind doing that?

Here you go:
===============================================
--- data_nx_pt_before.txt 2009-10-13 07:26:17.000000000 -0400
+++ data_nx_pt_after.txt 2009-10-13 07:26:46.000000000 -0400
@@ -2,12 +2,9 @@
0x00000000-0xc0000000 3G pmd
---[ Kernel Mapping ]---
0xc0000000-0xc0100000 1M RW GLB x pte
-0xc0100000-0xc048d000 3636K ro GLB x pte
-0xc048d000-0xc04d0000 268K RW GLB x pte
-0xc04d0000-0xc04d2000 8K RW GLB NX pte
-0xc04d2000-0xc04d3000 4K RW GLB x pte
-0xc04d3000-0xc0531000 376K RW GLB NX pte
-0xc0531000-0xc0600000 828K RW GLB x pte
+0xc0100000-0xc0381000 2564K ro GLB x pte
+0xc0381000-0xc048d000 1072K ro GLB NX pte
+0xc048d000-0xc0600000 1484K RW GLB NX pte
0xc0600000-0xf7800000 882M RW PSE GLB NX pmd
0xf7800000-0xf79fe000 2040K RW GLB NX pte
0xf79fe000-0xf7a00000 8K pte
===============================================

Would you like me to re-post whole patch with this addition?

Thanks.
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