[v2] powerpc/perf: Fix the kernel address leak to userspace via SDAR
patch-notifications at ellerman.id.au
Thu Mar 29 01:13:28 AEDT 2018
On Wed, 2018-03-21 at 11:40:26 UTC, Madhavan Srinivasan wrote:
> Sampled Data Address Register (SDAR) is a 64-bit
> register that contains the effective address of
> the storage operand of an instruction that was
> being executed, possibly out-of-order, at or around
> the time that the Performance Monitor alert occurred.
> In certain scenario SDAR happen to contain the kernel
> address even for userspace only sampling. Add checks
> to prevent it.
> Signed-off-by: Madhavan Srinivasan <maddy at linux.vnet.ibm.com>
Applied to powerpc next, thanks.
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