On Fri, 14 Nov 2014, Kees Cook wrote:
> On Fri, Nov 14, 2014 at 6:29 PM, Yinghai Lu wrote:
> > On Fri, Nov 14, 2014 at 5:29 PM, Yinghai Lu wrote:
> >> On Fri, Nov 14, 2014 at 12:45 PM, Kees Cook wrote:
> >>> v2:
> >>> - added call to free_init_pages(), as suggested by tglx
> >
> >> something
On Fri, 14 Nov 2014, Kees Cook wrote:
On Fri, Nov 14, 2014 at 6:29 PM, Yinghai Lu ying...@kernel.org wrote:
On Fri, Nov 14, 2014 at 5:29 PM, Yinghai Lu ying...@kernel.org wrote:
On Fri, Nov 14, 2014 at 12:45 PM, Kees Cook keesc...@chromium.org wrote:
v2:
- added call to
On Mon, Nov 17, 2014 at 12:27 PM, Kees Cook wrote:
> On Sun, Nov 16, 2014 at 3:44 PM, Thomas Gleixner wrote:
>>
>> So the initial patch to get rid of the X mapping is of course to just
>> extend the area to the PMD. A little bit different to your initial
>> patch, but essentially the same.
>>
>>
On Mon, Nov 17, 2014 at 12:32 PM, Russell King - ARM Linux
wrote:
> On Mon, Nov 17, 2014 at 12:27:59PM -0800, Kees Cook wrote:
>> I have a series for arm that is waiting to be picked up by rmk:
>> https://patchwork.ozlabs.org/patch/400383/
>
> It should've been in linux-next via my tree for the
On Mon, Nov 17, 2014 at 12:27:59PM -0800, Kees Cook wrote:
> I have a series for arm that is waiting to be picked up by rmk:
> https://patchwork.ozlabs.org/patch/400383/
It should've been in linux-next via my tree for the last two weeks
or so.
--
FTTC broadband for 0.8mile line: currently at
On Sun, Nov 16, 2014 at 3:44 PM, Thomas Gleixner wrote:
> On Fri, 14 Nov 2014, Kees Cook wrote:
>> On Fri, Nov 14, 2014 at 6:29 PM, Yinghai Lu wrote:
>> > should use attached one instead.
>> >
>> > 1. should use _brk_end instead of , as we only use partial of
>> >brk.
>> > 2. [_brk_end,
On Sun, Nov 16, 2014 at 3:44 PM, Thomas Gleixner t...@linutronix.de wrote:
On Fri, 14 Nov 2014, Kees Cook wrote:
On Fri, Nov 14, 2014 at 6:29 PM, Yinghai Lu ying...@kernel.org wrote:
should use attached one instead.
1. should use _brk_end instead of end, as we only use partial of
brk.
On Mon, Nov 17, 2014 at 12:27:59PM -0800, Kees Cook wrote:
I have a series for arm that is waiting to be picked up by rmk:
https://patchwork.ozlabs.org/patch/400383/
It should've been in linux-next via my tree for the last two weeks
or so.
--
FTTC broadband for 0.8mile line: currently at
On Mon, Nov 17, 2014 at 12:32 PM, Russell King - ARM Linux
li...@arm.linux.org.uk wrote:
On Mon, Nov 17, 2014 at 12:27:59PM -0800, Kees Cook wrote:
I have a series for arm that is waiting to be picked up by rmk:
https://patchwork.ozlabs.org/patch/400383/
It should've been in linux-next via my
On Mon, Nov 17, 2014 at 12:27 PM, Kees Cook keesc...@chromium.org wrote:
On Sun, Nov 16, 2014 at 3:44 PM, Thomas Gleixner t...@linutronix.de wrote:
So the initial patch to get rid of the X mapping is of course to just
extend the area to the PMD. A little bit different to your initial
patch,
On Sun, Nov 16, 2014 at 3:44 PM, Thomas Gleixner wrote:
>
> _brk_end is adjusted at boot time via extend_brk() up to __brk_limit,
> which is the same as _end. We usually do not use all of that space. So
> it's expected that _brk_end < _end.
>
>> Is this correct? It sounded like tglx wanted the
On Sun, Nov 16, 2014 at 1:26 PM, Thomas Gleixner wrote:
> On Sat, 15 Nov 2014, Yinghai Lu wrote:
>> +static pmd_t *last_pmd;
>> /*
>> * The head.S code sets up the kernel high mapping:
>> *
>> @@ -408,9 +409,26 @@ void __init cleanup_highmap(void)
>> continue;
>> if
On Sun, Nov 16, 2014 at 10:52 AM, Thomas Gleixner wrote:
>> >
>> > Are you sure? For me, _brk_end isn't far enough:
>> >
>> > [1.475572] all_end: 0x82df5000
>> > [1.476736] _brk_end: 0x82dd6000
>>
>> Yes. _brk_end should be small then &_end.
>
> Wrong. _brk_end can move up
On Fri, 14 Nov 2014, Kees Cook wrote:
> On Fri, Nov 14, 2014 at 6:29 PM, Yinghai Lu wrote:
> > should use attached one instead.
> >
> > 1. should use _brk_end instead of , as we only use partial of
> >brk.
> > 2. [_brk_end, pm_end) page range is already converted. aka
> >is not wasted.
>
On Sat, 15 Nov 2014, Yinghai Lu wrote:
> +static pmd_t *last_pmd;
> /*
> * The head.S code sets up the kernel high mapping:
> *
> @@ -408,9 +409,26 @@ void __init cleanup_highmap(void)
> continue;
> if (vaddr < (unsigned long) _text || vaddr > end)
>
On Fri, 14 Nov 2014, Yinghai Lu wrote:
> On Fri, Nov 14, 2014 at 6:46 PM, Kees Cook wrote:
> > On Fri, Nov 14, 2014 at 6:29 PM, Yinghai Lu wrote:
>
> >> should use attached one instead.
> >>
> >> 1. should use _brk_end instead of , as we only use partial of
> >>brk.
> >> 2. [_brk_end,
On Fri, 14 Nov 2014, Yinghai Lu wrote:
On Fri, Nov 14, 2014 at 6:46 PM, Kees Cook keesc...@chromium.org wrote:
On Fri, Nov 14, 2014 at 6:29 PM, Yinghai Lu ying...@kernel.org wrote:
should use attached one instead.
1. should use _brk_end instead of end, as we only use partial of
On Sat, 15 Nov 2014, Yinghai Lu wrote:
+static pmd_t *last_pmd;
/*
* The head.S code sets up the kernel high mapping:
*
@@ -408,9 +409,26 @@ void __init cleanup_highmap(void)
continue;
if (vaddr (unsigned long) _text || vaddr end)
set_pmd(pmd,
On Fri, 14 Nov 2014, Kees Cook wrote:
On Fri, Nov 14, 2014 at 6:29 PM, Yinghai Lu ying...@kernel.org wrote:
should use attached one instead.
1. should use _brk_end instead of end, as we only use partial of
brk.
2. [_brk_end, pm_end) page range is already converted. aka
is not
On Sun, Nov 16, 2014 at 10:52 AM, Thomas Gleixner t...@linutronix.de wrote:
Are you sure? For me, _brk_end isn't far enough:
[1.475572] all_end: 0x82df5000
[1.476736] _brk_end: 0x82dd6000
Yes. _brk_end should be small then _end.
Wrong. _brk_end can move up to
On Sun, Nov 16, 2014 at 1:26 PM, Thomas Gleixner t...@linutronix.de wrote:
On Sat, 15 Nov 2014, Yinghai Lu wrote:
+static pmd_t *last_pmd;
/*
* The head.S code sets up the kernel high mapping:
*
@@ -408,9 +409,26 @@ void __init cleanup_highmap(void)
continue;
if
On Sun, Nov 16, 2014 at 3:44 PM, Thomas Gleixner t...@linutronix.de wrote:
_brk_end is adjusted at boot time via extend_brk() up to __brk_limit,
which is the same as _end. We usually do not use all of that space. So
it's expected that _brk_end _end.
Is this correct? It sounded like tglx
On Fri, Nov 14, 2014 at 7:38 PM, Yinghai Lu wrote:
> On Fri, Nov 14, 2014 at 6:46 PM, Kees Cook wrote:
>> Is this correct? It sounded like tglx wanted the pmd split, like this:
>>
>> 0x8220-0x82c010M RW PSE GLB NX pmd
>> 0x82c0-0x82df5000
On Fri, Nov 14, 2014 at 7:38 PM, Yinghai Lu ying...@kernel.org wrote:
On Fri, Nov 14, 2014 at 6:46 PM, Kees Cook keesc...@chromium.org wrote:
Is this correct? It sounded like tglx wanted the pmd split, like this:
0x8220-0x82c010M RW PSE GLB NX pmd
On Fri, Nov 14, 2014 at 6:46 PM, Kees Cook wrote:
> On Fri, Nov 14, 2014 at 6:29 PM, Yinghai Lu wrote:
>> should use attached one instead.
>>
>> 1. should use _brk_end instead of , as we only use partial of
>>brk.
>> 2. [_brk_end, pm_end) page range is already converted. aka
>>is not
On Fri, Nov 14, 2014 at 7:06 PM, Kees Cook wrote:
> On Fri, Nov 14, 2014 at 5:29 PM, Yinghai Lu wrote:
>>
>> [0.00] .text: [0x0100-0x0200d548]
>> [0.00] .rodata: [0x0220-0x02a1cfff]
>> [0.00] .data: [0x02c0-0x02e50e7f]
>> [0.00] .init:
On Fri, Nov 14, 2014 at 5:29 PM, Yinghai Lu wrote:
> On Fri, Nov 14, 2014 at 12:45 PM, Kees Cook wrote:
>> When setting up permissions on kernel memory at boot, the end of the
>> PMD that was split from bss remained executable. It should be NX like
>> the rest. This performs a PMD alignment
On Fri, Nov 14, 2014 at 6:29 PM, Yinghai Lu wrote:
> On Fri, Nov 14, 2014 at 5:29 PM, Yinghai Lu wrote:
>> On Fri, Nov 14, 2014 at 12:45 PM, Kees Cook wrote:
>>> v2:
>>> - added call to free_init_pages(), as suggested by tglx
>
>> something is wrong:
>>
>> [7.842479] Freeing unused kernel
On Fri, Nov 14, 2014 at 5:29 PM, Yinghai Lu wrote:
> On Fri, Nov 14, 2014 at 12:45 PM, Kees Cook wrote:
>> v2:
>> - added call to free_init_pages(), as suggested by tglx
> something is wrong:
>
> [7.842479] Freeing unused kernel memory: 3844K (82e52000 -
> 83213000)
> [
On Fri, Nov 14, 2014 at 12:45 PM, Kees Cook wrote:
> When setting up permissions on kernel memory at boot, the end of the
> PMD that was split from bss remained executable. It should be NX like
> the rest. This performs a PMD alignment instead of a PAGE alignment to
> get the correct span of
When setting up permissions on kernel memory at boot, the end of the
PMD that was split from bss remained executable. It should be NX like
the rest. This performs a PMD alignment instead of a PAGE alignment to
get the correct span of memory, and should be freed.
Before:
---[ High Kernel Mapping
When setting up permissions on kernel memory at boot, the end of the
PMD that was split from bss remained executable. It should be NX like
the rest. This performs a PMD alignment instead of a PAGE alignment to
get the correct span of memory, and should be freed.
Before:
---[ High Kernel Mapping
On Fri, Nov 14, 2014 at 12:45 PM, Kees Cook keesc...@chromium.org wrote:
When setting up permissions on kernel memory at boot, the end of the
PMD that was split from bss remained executable. It should be NX like
the rest. This performs a PMD alignment instead of a PAGE alignment to
get the
On Fri, Nov 14, 2014 at 5:29 PM, Yinghai Lu ying...@kernel.org wrote:
On Fri, Nov 14, 2014 at 12:45 PM, Kees Cook keesc...@chromium.org wrote:
v2:
- added call to free_init_pages(), as suggested by tglx
something is wrong:
[7.842479] Freeing unused kernel memory: 3844K
On Fri, Nov 14, 2014 at 6:29 PM, Yinghai Lu ying...@kernel.org wrote:
On Fri, Nov 14, 2014 at 5:29 PM, Yinghai Lu ying...@kernel.org wrote:
On Fri, Nov 14, 2014 at 12:45 PM, Kees Cook keesc...@chromium.org wrote:
v2:
- added call to free_init_pages(), as suggested by tglx
something is
On Fri, Nov 14, 2014 at 5:29 PM, Yinghai Lu ying...@kernel.org wrote:
On Fri, Nov 14, 2014 at 12:45 PM, Kees Cook keesc...@chromium.org wrote:
When setting up permissions on kernel memory at boot, the end of the
PMD that was split from bss remained executable. It should be NX like
the rest.
On Fri, Nov 14, 2014 at 7:06 PM, Kees Cook keesc...@chromium.org wrote:
On Fri, Nov 14, 2014 at 5:29 PM, Yinghai Lu ying...@kernel.org wrote:
[0.00] .text: [0x0100-0x0200d548]
[0.00] .rodata: [0x0220-0x02a1cfff]
[0.00] .data: [0x02c0-0x02e50e7f]
[
On Fri, Nov 14, 2014 at 6:46 PM, Kees Cook keesc...@chromium.org wrote:
On Fri, Nov 14, 2014 at 6:29 PM, Yinghai Lu ying...@kernel.org wrote:
should use attached one instead.
1. should use _brk_end instead of end, as we only use partial of
brk.
2. [_brk_end, pm_end) page range is already
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