tools/power turbostat: Set per_cpu_msr_sum to NULL after free

Set per_cpu_msr_sum to NULL after freeing it in the error path
of msr_sum_record() to prevent potential use-after-free issues.

Signed-off-by: Emily Ehlert <ehemily@amazon.com>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 2854b66eb74809bc15aa9fbf679e6ab899547d31..8154d110dd07d81001bbd444490d9b39e1877fba 100644 (file)
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -6652,6 +6652,7 @@ release_timer:
        timer_delete(timerid);
 release_msr:
        free(per_cpu_msr_sum);
+       per_cpu_msr_sum = NULL;
 }
 
 /*