Need to fix. Not sure where the rwx mapping comes from. On September 28, 2015 3:05:33 PM PDT, Kees Cook <[email protected]> wrote: >On Mon, Sep 28, 2015 at 2:16 PM, H. Peter Anvin <[email protected]> wrote: >> 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. > >Do you mean "should be" as in, that's how it's coded now, or "should >be" in that we need to fix it? (If we need to fix it, where is that >"default"? I haven't been able to find it yet.) > >-Kees
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