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To: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
From: Michael Ellerman <patch-notifications@ellerman.id.au>
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>,
 linuxppc-dev@lists.ozlabs.org
Subject: Re: [v2] powerpc/perf: Fix the kernel address leak to userspace via
 SDAR
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Date: Thu, 29 Mar 2018 01:13:28 +1100 (AEDT)
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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@linux.vnet.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/cd1231d7035fea894118d5155ff984

cheers