Messages in this thread Patch in this message | | | From | Anju T Sudhakar <> | Subject | [PATCH v4 3/5] powerpc/perf: Add privileged access check for thread_imc | Date | Mon, 15 Apr 2019 15:42:02 +0530 |
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From: Madhavan Srinivasan <maddy@linux.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@linux.vnet.ibm.com> Signed-off-by: Anju T Sudhakar <anju@linux.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 51f1d3eaaa6d..7fe258e17dfe 100644 --- a/arch/powerpc/perf/imc-pmu.c +++ b/arch/powerpc/perf/imc-pmu.c @@ -859,6 +859,9 @@ 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; -- 2.17.2
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