Messages in this thread Patch in this message | | | From | Anju T Sudhakar <> | Subject | [PATCH v3 3/5] powerpc/perf: Add privileged access check for thread_imc | Date | Thu, 7 Feb 2019 12:33:10 +0530 |
| |
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 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
| |