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why no kernel randomization

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why no kernel randomization

Malte Gell-3
Hi there,

why is the SUSE kernel built without CONFIG_RANDOMIZE_BASE?
Does it have any disadvantages if enabled?
Would it break any software or functions?

Thanks
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Re: why no kernel randomization

Malte Gell-3
Am 15.09.2016 um 08:41 schrieb [hidden email]:
> On Tue, Sep 13, 2016 at 07:17:34AM +0200, Malte Gell wrote:
>> why is the SUSE kernel built without CONFIG_RANDOMIZE_BASE?
>
> Have a look at
> http://bugzilla.suse.com/show_bug.cgi?id=998554
> we enabled it in Tumbleweed, so we can test it there.

Thanx, great!
I may test it with the Leap 42.1 kernel later this day/week.

Best regards


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Re: why no kernel randomization

Malte Gell-3
Am 15.09.2016 um 10:00 schrieb Malte Gell:

> Am 15.09.2016 um 08:41 schrieb [hidden email]:
>> On Tue, Sep 13, 2016 at 07:17:34AM +0200, Malte Gell wrote:
>>> why is the SUSE kernel built without CONFIG_RANDOMIZE_BASE?
>>
>> Have a look at
>> http://bugzilla.suse.com/show_bug.cgi?id=998554
>> we enabled it in Tumbleweed, so we can test it there.
>
> Thanx, great!
> I may test it with the Leap 42.1 kernel later this day/week.

I can confirm suspend to RAM works perfectly with 42.1 and kernel
randomization enabled. My machine suspends and wakes up fine. Though, I
have not tested suspend to disk, since I donĀ“t use that. But, STR is fine.

My guess is, people complaining of broken suspend dont look at enabled
wakeup events in /proc/acpi/wakeup! Happened to me first as well.

I put this code in /etc/init.d/boot.local to make sure, after booting I
have no wakeup events set:

ENABLED=$(cat /proc/acpi/wakeup | grep enabled | cut -c1-4)
for DISABLE in $ENABLED
        do echo $DISABLE > /proc/acpi/wakeup
done
# set exception for keyboard, make sure to use correct device like UHCx
# echo UHC6 > /proc/acpi/wakeup


Regards

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