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Date: Thu, 7 Feb 2019 12:33:10 +0530 From: Anju T Sudhakar <anju@...ux.vnet.ibm.com> To: mpe@...erman.id.au Cc: linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, maddy@...ux.vnet.ibm.com, anju@...ux.vnet.ibm.com Subject: [PATCH v3 3/5] powerpc/perf: Add privileged access check for thread_imc From: Madhavan Srinivasan <maddy@...ux.vnet.ibm.com> Add code to restrict user access to thread_imc pmu since some event report privilege level information. Fixes: f74c89bd80fb3 ('powerpc/perf: Add thread IMC PMU support') Signed-off-by: Madhavan Srinivasan <maddy@...ux.vnet.ibm.com> Signed-off-by: Anju T Sudhakar <anju@...ux.vnet.ibm.com> --- arch/powerpc/perf/imc-pmu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/powerpc/perf/imc-pmu.c b/arch/powerpc/perf/imc-pmu.c index 3bef46f8417d..5ca80545a849 100644 --- a/arch/powerpc/perf/imc-pmu.c +++ b/arch/powerpc/perf/imc-pmu.c @@ -877,6 +877,9 @@ static int thread_imc_event_init(struct perf_event *event) if (event->attr.type != event->pmu->type) return -ENOENT; + if (!capable(CAP_SYS_ADMIN)) + return -EACCES; + /* Sampling not supported */ if (event->hw.sample_period) return -EINVAL; -- 2.17.1
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