[SRU Groovy] hwmon: (amd_energy) modify the visibility of the counters

[Thadeu Lima de Souza Cascardo]

From: Naveen Krishna Chatradhi <nchatrad at amd.com>

This patch limits the visibility to owner and groups only for the
energy counters exposed through the hwmon based amd_energy driver.

Cc: stable at vger.kernel.org
Reviewed-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Signed-off-by: Naveen Krishna Chatradhi <nchatrad at amd.com>
Link: https://lore.kernel.org/r/20201112172159.8781-1-nchatrad@amd.com
Signed-off-by: Guenter Roeck <linux at roeck-us.net>
(cherry picked from commit 60268b0e8258fdea9a3c9f4b51e161c123571db3)
CVE-2020-12912
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo at canonical.com>
---
 drivers/hwmon/amd_energy.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/amd_energy.c b/drivers/hwmon/amd_energy.c
index 29603742c858..0dee535e6c85 100644
--- a/drivers/hwmon/amd_energy.c
+++ b/drivers/hwmon/amd_energy.c
@@ -209,7 +209,7 @@ static umode_t amd_energy_is_visible(const void *_data,
 				     enum hwmon_sensor_types type,
 				     u32 attr, int channel)
 {
-	return 0444;
+	return 0440;
 }
 
 static int energy_accumulator(void *p)
-- 
2.27.0