diff mbox series

[v4,3/5] powerpc/perf: Add privileged access check for thread_imc

Message ID 20190416094831.7264-4-anju@linux.vnet.ibm.com (mailing list archive)
State Accepted
Commit 216c3087a346db8d7c8a064d2b8f0f49e4694934
Headers show
Series powerpc/perf: IMC trace-mode support | expand

Checks

Context Check Description
snowpatch_ozlabs/apply_patch success Successfully applied on branch next (8c2ffd9174779014c3fe1f96d9dc3641d9175f00)
snowpatch_ozlabs/checkpatch success total: 0 errors, 0 warnings, 0 checks, 9 lines checked

Commit Message

Anju T Sudhakar April 16, 2019, 9:48 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 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;