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commit 1abb2648698bf10783d2236a6b4a7ca5e8021699 upstream. It malicious user provides a small pptable through sysfs and then a bigger pptable, it may cause buffer overflow attack in function smu_sys_set_pp_table(). Reviewed-by: Lijo Lazar <lijo.lazar@amd.com> Signed-off-by: Jiang Liu <gerry@linux.alibaba.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>