On Wed, 2018-03-21 at 11:40:25 UTC, Madhavan Srinivasan wrote:

The current Branch History Rolling Buffer (BHRB) code does
not check for any privilege levels before updating the data
from BHRB. This leaks kernel addresses to userspace even when
profiling only with userspace privileges. Add proper checks
to prevent it.

Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Madhavan Srinivasan <redacted>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/bb19af816025d495376bd76bf6fbcf

cheers