forked from jianmu/TencentOS-kernel
b69719524d
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>
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|---|---|---|
| .. | ||
| Kconfig | ||
| Makefile | ||
| idle_inject.c | ||
| intel_rapl_common.c | ||
| intel_rapl_msr.c | ||
| powercap_sys.c | ||