[v2] powerpc/perf: Fix kernel address leak to userspace via BHRB buffer
patch-notifications at ellerman.id.au
Thu Mar 29 01:13:27 AEDT 2018
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 at gmail.com>
> Signed-off-by: Madhavan Srinivasan <maddy at linux.vnet.ibm.com>
Applied to powerpc next, thanks.
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