On Fri, Jun 29, 2018 at 11:16:58AM -0400, Steven Rostedt wrote:
> On Fri, 29 Jun 2018 16:47:14 +0200
> Matthias Reichl wrote:
>
> > On Tue, Dec 05, 2017 at 12:14:46PM -0800, Kees Cook wrote:
> > > On Tue, Dec 5, 2017 at 12:09 PM, Russell King - ARM Linux
> > > wrote:
> > > > On Tue, Dec 05, 20
On Fri, 29 Jun 2018 16:47:14 +0200
Matthias Reichl wrote:
> On Tue, Dec 05, 2017 at 12:14:46PM -0800, Kees Cook wrote:
> > On Tue, Dec 5, 2017 at 12:09 PM, Russell King - ARM Linux
> > wrote:
> > > On Tue, Dec 05, 2017 at 11:35:59AM -0800, Kees Cook wrote:
> > >> We don't _need_ to, but they
On Tue, Dec 05, 2017 at 12:14:46PM -0800, Kees Cook wrote:
> On Tue, Dec 5, 2017 at 12:09 PM, Russell King - ARM Linux
> wrote:
> > On Tue, Dec 05, 2017 at 11:35:59AM -0800, Kees Cook wrote:
> >> We don't _need_ to, but they're all contiguous, so the ro_perms array
> >> used by set_kernel_text_*()
On Tue, Dec 5, 2017 at 12:09 PM, Russell King - ARM Linux
wrote:
> On Tue, Dec 05, 2017 at 11:35:59AM -0800, Kees Cook wrote:
>> We don't _need_ to, but they're all contiguous, so the ro_perms array
>> used by set_kernel_text_*() is actually only a single entry:
>>
>> static struct section_perm ro
On Tue, Dec 05, 2017 at 11:35:59AM -0800, Kees Cook wrote:
> We don't _need_ to, but they're all contiguous, so the ro_perms array
> used by set_kernel_text_*() is actually only a single entry:
>
> static struct section_perm ro_perms[] = {
> /* Make kernel code and rodata RX (set RO). */
>
On Tue, Dec 5, 2017 at 5:36 AM, Russell King - ARM Linux
wrote:
> On Tue, Dec 05, 2017 at 01:30:11PM +, Phil Elwell wrote:
>> This was my initial explanation:
>>
>> 1. Data which is marked __ro_after_init is initially writeable.
>>
>> 2. The ro_perms data covers kernel text, read-only data and
On 05/12/2017 13:23, Matthias Reichl wrote:
> On Tue, Dec 05, 2017 at 01:14:17PM +, Russell King - ARM Linux wrote:
>> On Tue, Dec 05, 2017 at 12:47:09PM +0100, Matthias Reichl wrote:
>>> On Wed, Aug 23, 2017 at 03:03:51PM -0400, Steven Rostedt wrote:
On Wed, 23 Aug 2017 11:48:13 -0700
>>>
On Tue, Dec 05, 2017 at 01:30:11PM +, Phil Elwell wrote:
> On 05/12/2017 13:23, Matthias Reichl wrote:
> > On Tue, Dec 05, 2017 at 01:14:17PM +, Russell King - ARM Linux wrote:
> >> On Tue, Dec 05, 2017 at 12:47:09PM +0100, Matthias Reichl wrote:
> >>> On Wed, Aug 23, 2017 at 03:03:51PM -04
On Tue, Dec 05, 2017 at 01:14:17PM +, Russell King - ARM Linux wrote:
> On Tue, Dec 05, 2017 at 12:47:09PM +0100, Matthias Reichl wrote:
> > On Wed, Aug 23, 2017 at 03:03:51PM -0400, Steven Rostedt wrote:
> > > On Wed, 23 Aug 2017 11:48:13 -0700
> > > Kees Cook wrote:
> > >
> > > > > diff --g
On Tue, Dec 05, 2017 at 12:47:09PM +0100, Matthias Reichl wrote:
> On Wed, Aug 23, 2017 at 03:03:51PM -0400, Steven Rostedt wrote:
> > On Wed, 23 Aug 2017 11:48:13 -0700
> > Kees Cook wrote:
> >
> > > > diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
> > > > index ad80548..fd75f38 100644
> >
On Wed, Aug 23, 2017 at 03:03:51PM -0400, Steven Rostedt wrote:
> On Wed, 23 Aug 2017 11:48:13 -0700
> Kees Cook wrote:
>
> > > diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
> > > index ad80548..fd75f38 100644
> > > --- a/arch/arm/mm/init.c
> > > +++ b/arch/arm/mm/init.c
> > > @@ -745,19 +
On Wed, 23 Aug 2017 11:48:13 -0700
Kees Cook wrote:
> > diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
> > index ad80548..fd75f38 100644
> > --- a/arch/arm/mm/init.c
> > +++ b/arch/arm/mm/init.c
> > @@ -745,19 +745,29 @@ static int __mark_rodata_ro(void *unused)
> > return 0;
> > }
On Wed, Aug 23, 2017 at 10:58 AM, Steven Rostedt wrote:
>
> ftrace needs to modify the kernel text in order to enable function tracing.
> For security reasons, the kernel text is marked to read-only (ro) at the end
> of system bootup. When enabling function tracing after that, ftrace calls
> arch
On Wed, Aug 23, 2017 at 01:58:36PM -0400, Steven Rostedt wrote:
>
> ftrace needs to modify the kernel text in order to enable function tracing.
> For security reasons, the kernel text is marked to read-only (ro) at the end
> of system bootup. When enabling function tracing after that, ftrace calls
ftrace needs to modify the kernel text in order to enable function tracing.
For security reasons, the kernel text is marked to read-only (ro) at the end
of system bootup. When enabling function tracing after that, ftrace calls
arch specific code that needs to enable the modification of kernel text
15 matches
Mail list logo
