* Kees Cook wrote:
> On Thu, Oct 1, 2015 at 2:12 AM, Ingo Molnar wrote:
> >
> > * Thomas Gleixner wrote:
> >
> >> On Mon, 28 Sep 2015, Kees Cook wrote:
> >> > > --- a/arch/x86/mm/init_64.c
> >> > > +++ b/arch/x86/mm/init_64.c
> >> > > @@ -1132,7 +1132,7 @@ void mark_rodata_ro(void)
> >> > >
* Kees Cook wrote:
> On Thu, Oct 1, 2015 at 2:12 AM, Ingo Molnar wrote:
> >
> > * Thomas Gleixner wrote:
> >
> >> On Mon, 28 Sep 2015, Kees Cook wrote:
> >> > > --- a/arch/x86/mm/init_64.c
> >> > > +++ b/arch/x86/mm/init_64.c
> >> >
On Thu, Oct 1, 2015 at 2:12 AM, Ingo Molnar wrote:
>
> * Thomas Gleixner wrote:
>
>> On Mon, 28 Sep 2015, Kees Cook wrote:
>> > > --- a/arch/x86/mm/init_64.c
>> > > +++ b/arch/x86/mm/init_64.c
>> > > @@ -1132,7 +1132,7 @@ void mark_rodata_ro(void)
>> > > * has been zapped already via
* Thomas Gleixner wrote:
> On Mon, 28 Sep 2015, Kees Cook wrote:
> > > --- a/arch/x86/mm/init_64.c
> > > +++ b/arch/x86/mm/init_64.c
> > > @@ -1132,7 +1132,7 @@ void mark_rodata_ro(void)
> > > * has been zapped already via cleanup_highmem().
> > > */
> > > all_end =
On Mon, 28 Sep 2015, Kees Cook wrote:
> > --- a/arch/x86/mm/init_64.c
> > +++ b/arch/x86/mm/init_64.c
> > @@ -1132,7 +1132,7 @@ void mark_rodata_ro(void)
> > * has been zapped already via cleanup_highmem().
> > */
> > all_end = roundup((unsigned long)_brk_end, PMD_SIZE);
* Kees Cook wrote:
> On Mon, Sep 28, 2015 at 7:11 AM, Stephen Smalley wrote:
> > On 09/24/2015 06:25 PM, Kees Cook wrote:
> >> On Thu, Sep 24, 2015 at 1:26 PM, Stephen Smalley
> >> wrote:
> >>> Hi,
> >>>
> >>> With the attached config and 4.3-rc2 on x86_64, I see the following in
> >>>
On Thu, Oct 1, 2015 at 2:12 AM, Ingo Molnar wrote:
>
> * Thomas Gleixner wrote:
>
>> On Mon, 28 Sep 2015, Kees Cook wrote:
>> > > --- a/arch/x86/mm/init_64.c
>> > > +++ b/arch/x86/mm/init_64.c
>> > > @@ -1132,7 +1132,7 @@ void mark_rodata_ro(void)
>> > >
* Kees Cook wrote:
> On Mon, Sep 28, 2015 at 7:11 AM, Stephen Smalley wrote:
> > On 09/24/2015 06:25 PM, Kees Cook wrote:
> >> On Thu, Sep 24, 2015 at 1:26 PM, Stephen Smalley
> >> wrote:
> >>> Hi,
> >>>
> >>> With the attached
On Mon, 28 Sep 2015, Kees Cook wrote:
> > --- a/arch/x86/mm/init_64.c
> > +++ b/arch/x86/mm/init_64.c
> > @@ -1132,7 +1132,7 @@ void mark_rodata_ro(void)
> > * has been zapped already via cleanup_highmem().
> > */
> > all_end = roundup((unsigned long)_brk_end, PMD_SIZE);
* Thomas Gleixner wrote:
> On Mon, 28 Sep 2015, Kees Cook wrote:
> > > --- a/arch/x86/mm/init_64.c
> > > +++ b/arch/x86/mm/init_64.c
> > > @@ -1132,7 +1132,7 @@ void mark_rodata_ro(void)
> > > * has been zapped already via cleanup_highmem().
> > > */
> > >
Need to fix. Not sure where the rwx mapping comes from.
On September 28, 2015 3:05:33 PM PDT, Kees Cook wrote:
>On Mon, Sep 28, 2015 at 2:16 PM, H. Peter Anvin wrote:
>> On 09/25/2015 12:22 AM, Ingo Molnar wrote:
To me it looks like another alignment/padding issue like got fixed
On Mon, Sep 28, 2015 at 2:16 PM, H. Peter Anvin 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
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
On Mon, Sep 28, 2015 at 7:11 AM, Stephen Smalley wrote:
> On 09/24/2015 06:25 PM, Kees Cook wrote:
>> On Thu, Sep 24, 2015 at 1:26 PM, Stephen Smalley wrote:
>>> Hi,
>>>
>>> With the attached config and 4.3-rc2 on x86_64, I see the following in
>>> /sys/kernel/debug/kernel_page_tables:
>>> ...
On 09/24/2015 06:25 PM, Kees Cook wrote:
> On Thu, Sep 24, 2015 at 1:26 PM, Stephen Smalley wrote:
>> Hi,
>>
>> With the attached config and 4.3-rc2 on x86_64, I see the following in
>> /sys/kernel/debug/kernel_page_tables:
>> ...
>> ---[ High Kernel Mapping ]---
>>
On Mon, Sep 28, 2015 at 7:11 AM, Stephen Smalley wrote:
> On 09/24/2015 06:25 PM, Kees Cook wrote:
>> On Thu, Sep 24, 2015 at 1:26 PM, Stephen Smalley wrote:
>>> Hi,
>>>
>>> With the attached config and 4.3-rc2 on x86_64, I see the following in
>>>
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
On 09/24/2015 06:25 PM, Kees Cook wrote:
> On Thu, Sep 24, 2015 at 1:26 PM, Stephen Smalley wrote:
>> Hi,
>>
>> With the attached config and 4.3-rc2 on x86_64, I see the following in
>> /sys/kernel/debug/kernel_page_tables:
>> ...
>> ---[ High Kernel Mapping ]---
>>
Need to fix. Not sure where the rwx mapping comes from.
On September 28, 2015 3:05:33 PM PDT, Kees Cook wrote:
>On Mon, Sep 28, 2015 at 2:16 PM, H. Peter Anvin wrote:
>> On 09/25/2015 12:22 AM, Ingo Molnar wrote:
To me it looks like another
On Mon, Sep 28, 2015 at 2:16 PM, H. Peter Anvin 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
On Fri, Sep 25, 2015 at 12:22 AM, Ingo Molnar wrote:
>
> * Kees Cook wrote:
>
>> On Thu, Sep 24, 2015 at 1:26 PM, Stephen Smalley wrote:
>> > Hi,
>> >
>> > With the attached config and 4.3-rc2 on x86_64, I see the following in
>> > /sys/kernel/debug/kernel_page_tables:
>> > ...
>> > ---[ High
On Fri, Sep 25, 2015 at 12:22 AM, Ingo Molnar wrote:
>
> * Kees Cook wrote:
>
>> On Thu, Sep 24, 2015 at 1:26 PM, Stephen Smalley wrote:
>> > Hi,
>> >
>> > With the attached config and 4.3-rc2 on x86_64, I see the following in
>> >
* Kees Cook wrote:
> On Thu, Sep 24, 2015 at 1:26 PM, Stephen Smalley wrote:
> > Hi,
> >
> > With the attached config and 4.3-rc2 on x86_64, I see the following in
> > /sys/kernel/debug/kernel_page_tables:
> > ...
> > ---[ High Kernel Mapping ]---
> > 0x8000-0x8100
* Kees Cook wrote:
> On Thu, Sep 24, 2015 at 1:26 PM, Stephen Smalley wrote:
> > Hi,
> >
> > With the attached config and 4.3-rc2 on x86_64, I see the following in
> > /sys/kernel/debug/kernel_page_tables:
> > ...
> > ---[ High Kernel Mapping ]---
> > 0x8000-0x8100
* Kees Cook wrote:
> On Thu, Sep 24, 2015 at 1:26 PM, Stephen Smalley wrote:
> > Hi,
> >
> > With the attached config and 4.3-rc2 on x86_64, I see the following in
> > /sys/kernel/debug/kernel_page_tables:
> > ...
> > ---[ High Kernel Mapping ]---
>
* Kees Cook wrote:
> On Thu, Sep 24, 2015 at 1:26 PM, Stephen Smalley wrote:
> > Hi,
> >
> > With the attached config and 4.3-rc2 on x86_64, I see the following in
> > /sys/kernel/debug/kernel_page_tables:
> > ...
> > ---[ High Kernel Mapping ]---
>
On Thu, Sep 24, 2015 at 1:26 PM, Stephen Smalley wrote:
> Hi,
>
> With the attached config and 4.3-rc2 on x86_64, I see the following in
> /sys/kernel/debug/kernel_page_tables:
> ...
> ---[ High Kernel Mapping ]---
> 0x8000-0x8100 16M
On Thu, Sep 24, 2015 at 1:26 PM, Stephen Smalley wrote:
> Hi,
>
> With the attached config and 4.3-rc2 on x86_64, I see the following in
> /sys/kernel/debug/kernel_page_tables:
> ...
> ---[ High Kernel Mapping ]---
> 0x8000-0x8100 16M
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