Re: rwx mapping between ex_table and rodata

[H. Peter Anvin]

On 09/25/2015 12:22 AM, Ingo Molnar wrote:
>>
>> To me it looks like another alignment/padding issue like got fixed
>> before. The space between __ex_table and rodata is (seems?) unused, so
>> the default page table permissions end up being W+X. Can we fix the
>> default to be NX instead? It'll make these bugs stay gone.
> 
> Yeah. Wanna send a patch for that?
> 

At least in the high mapping space, the default should be no permissions
(not present), rather than just NX.

	-hpa


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/