From 216c3087a346db8d7c8a064d2b8f0f49e4694934 Mon Sep 17 00:00:00 2001 From: Madhavan Srinivasan Date: Tue, 16 Apr 2019 15:18:29 +0530 Subject: [PATCH] powerpc/perf: Add privileged access check for thread_imc 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 Signed-off-by: Anju T Sudhakar Signed-off-by: Michael Ellerman --- 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 23092a359ce0..975837d85a80 100644 --- a/arch/powerpc/perf/imc-pmu.c +++ b/arch/powerpc/perf/imc-pmu.c @@ -864,6 +864,9 @@ 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; -- 2.45.2