Re: [PATCH 1/2] vsprintf/sysctl: Bugfix, neaten and document %pKusages

[Joe Perches]

On Fri, 2013-10-11 at 16:31 +1100, Ryan Mallon wrote:
> On 11/10/13 16:25, Joe Perches wrote:
> > Printing kernel pointers via %pK has a minor defect when
> > kptr_restrict is set to 2:  the pointer may be emitted
> > as "pK-error" instead of all 0's when in an interrupt.
> 
> NAK. This is not a defect, as I explained earlier. It is really a defect
> that it _doesn't_ print 'pK-error' in all cases. 'pK-error' is for
> finding kernel bugs.

Not my understanding.

There is no bug to find when emitting a pointer via %pK.

The only issue is that has_capability_noaudit can not
be called from an interrupt.


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