diff mbox series

[v3,3/5] powerpc/perf: Add privileged access check for thread_imc

Message ID 20190207070312.5150-4-anju@linux.vnet.ibm.com (mailing list archive)
State Superseded
Headers show
Series powerpc/perf: IMC trace-mode support | expand

Checks

Context Check Description
snowpatch_ozlabs/apply_patch success next/apply_patch Successfully applied
snowpatch_ozlabs/checkpatch success total: 0 errors, 0 warnings, 0 checks, 9 lines checked

Commit Message

Anju T Sudhakar Feb. 7, 2019, 7:03 a.m. UTC 
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 mbox series

Patch

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;