From: Greg KH
> Sent: 16 May 2017 11:19
> Format specifier %p can leak kernel addresses while not valuing the
> kptr_restrict system settings. When kptr_restrict is set to (1), kernel
> pointers printed using the %pK format specifier will be replaced with
> Zeros. Debugging Note : &pK prints only Zeros as address. If you need
> actual address information, write 0 to kptr_restrict.
>
> echo 0 > /proc/sys/kernel/kptr_restrict
ISTM that kptr_restrict ought to affect all %p, except a few that
would be annotated as user pointers (or look at the value??).
Would also be better to output (say) <restricted> rather than 0.
Although 0x0 could be output for NULL pointers.
David
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