On Mon, Apr 30, 2018 at 7:06 PM, Randy Dunlap wrote:
> On 04/30/2018 10:01 AM, Linus Torvalds wrote:
>> On Mon, Apr 30, 2018 at 9:57 AM Linus Torvalds <
>> torva...@linux-foundation.org> wrote:
>>
>>> Although in *practice* we'd have tons of entropy on any modern development
>>> CPU too, since any
On Mon, Apr 30, 2018 at 05:12:05PM +, Linus Torvalds wrote:
> On Mon, Apr 30, 2018 at 10:06 AM Randy Dunlap wrote:
> > On 04/30/2018 10:01 AM, Linus Torvalds wrote:
> > >
> > > No kernel command line needed in practice any more. That's assuming any
> > > kernel developer will have an IvyBridge
On Mon, Apr 30, 2018 at 12:16:45PM -0700, Kees Cook wrote:
> On Mon, Apr 30, 2018 at 12:00 PM, Linus Torvalds
> wrote:
> > On Mon, Apr 30, 2018 at 11:38 AM Kees Cook wrote:
> >
> >> Something like this? (Untested.)
> >
> > Looks workable.
> >
> >> + /* If we have hw RNG, start hashing immed
On Mon, Apr 30, 2018 at 1:01 PM Linus Torvalds <
torva...@linux-foundation.org> wrote:
> But if there are no actual users of get_random_bytes_arch(), maybe we can
> just remove the fallback to the non-arch code, and add that return value
> (and the __must_check()).
Hmm. It is exported, so maybe t
On Mon, Apr 30, 2018 at 12:16 PM Kees Cook wrote:
> I just noticed: there are _no_ users of get_random_bytes_arch() ...
> didn't we once use it to feed entropy to the CRNG?
We use arch_get_random_long() for that. See "crng_initialize()".
But if there are no actual users of get_random_bytes_arch
On Mon, Apr 30, 2018 at 12:00 PM, Linus Torvalds
wrote:
> On Mon, Apr 30, 2018 at 11:38 AM Kees Cook wrote:
>
>> Something like this? (Untested.)
>
> Looks workable.
>
>> + /* If we have hw RNG, start hashing immediately. */
>> + if (arch_has_random()) {
>> + get_random_
On Mon, Apr 30, 2018 at 11:38 AM Kees Cook wrote:
> Something like this? (Untested.)
Looks workable.
> + /* If we have hw RNG, start hashing immediately. */
> + if (arch_has_random()) {
> + get_random_bytes_arch(&ptr_key, sizeof(ptr_key));
> + ptr_key_rea
On Mon, Apr 30, 2018 at 10:01 AM, Linus Torvalds
wrote:
> On Mon, Apr 30, 2018 at 9:57 AM Linus Torvalds <
> torva...@linux-foundation.org> wrote:
>
>> Although in *practice* we'd have tons of entropy on any modern development
>> CPU too, since any new hardware will have the hardware random number
On Mon, Apr 30, 2018 at 10:06 AM Randy Dunlap wrote:
> On 04/30/2018 10:01 AM, Linus Torvalds wrote:
> >
> > No kernel command line needed in practice any more. That's assuming any
> > kernel developer will have an IvyBridge or newer.
> any paid kernel developer :)
I suspect a lot of hobbyists t
On 04/30/2018 10:01 AM, Linus Torvalds wrote:
> On Mon, Apr 30, 2018 at 9:57 AM Linus Torvalds <
> torva...@linux-foundation.org> wrote:
>
>> Although in *practice* we'd have tons of entropy on any modern development
>> CPU too, since any new hardware will have the hardware random number
>> genera
On Mon, Apr 30, 2018 at 9:57 AM Linus Torvalds <
torva...@linux-foundation.org> wrote:
> Although in *practice* we'd have tons of entropy on any modern development
> CPU too, since any new hardware will have the hardware random number
> generation. Some overly cautious person might not trust it, o
On Mon, Apr 30, 2018 at 9:41 AM Steven Rostedt wrote:
> >
> > And if we really want a command line option, can we make that still hash
> > the pointer, just force the entropy early. That way kernel developers
that
> > test that command line option are still testing the *hashing*, they just
> > ar
On Mon, 30 Apr 2018 16:31:52 +
Linus Torvalds wrote:
> On Mon, Apr 30, 2018 at 9:11 AM Kees Cook wrote:
>
> > I (or other folks?) had proposed this before, but, AIUI, Linus remains
> > opposed.
>
> Yeah, I hate this, because it will make people paper over their problems by
> just booting
On Mon, Apr 30, 2018 at 9:11 AM Kees Cook wrote:
> I (or other folks?) had proposed this before, but, AIUI, Linus remains
> opposed.
Yeah, I hate this, because it will make people paper over their problems by
just booting with that option.
I think it should just be fixed.
Is there really any r
On Mon, Apr 30, 2018 at 8:50 AM, Anna-Maria Gleixner
wrote:
> Hi,
>
> I stumbled over an issue with hashed pointers and tracing.
>
> I'm using trace points for examination and on error the trace buffers
> are dumped. The error occurs when entropy has not been set up, so the
> pointers are not hash
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