lkml.org 
[lkml]   [2019]   [Feb]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 3/5] powerpc/perf: Add privileged access check for thread_imc
Date
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
\
 
 \ /
  Last update: 2019-02-07 08:04    [W:0.046 / U:0.028 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site