diff options
author | Len Brown <len.brown@intel.com> | 2020-11-10 13:00:00 -0800 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-11-10 21:13:20 +0100 |
commit | 19f6d91bdad42200aac557a683c17b1f65ee6c94 (patch) | |
tree | 5ee972809ea3dce01735d1b1320ffe4204d1217c /arch/arc/boot/dts/axc003.dtsi | |
parent | ec9c6b417e271ee76d1430d2b197794858238d3b (diff) |
powercap: restrict energy meter to root access
commit 949dd0104c496fa7c14991a23c03c62e44637e71 upstream.
Remove non-privileged user access to power data contained in
/sys/class/powercap/intel-rapl*/*/energy_uj
Non-privileged users currently have read access to power data and can
use this data to form a security attack. Some privileged
drivers/applications need read access to this data, but don't expose it
to non-privileged users.
For example, thermald uses this data to ensure that power management
works correctly. Thus removing non-privileged access is preferred over
completely disabling this power reporting capability with
CONFIG_INTEL_RAPL=n.
Fixes: 95677a9a3847 ("PowerCap: Fix mode for energy counter")
Signed-off-by: Len Brown <len.brown@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/arc/boot/dts/axc003.dtsi')
0 files changed, 0 insertions, 0 deletions