linux-kernel - [PATCH 1/2] tools/power/turbostat: Set per_cpu_msr

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Message-ID: <20251113191609.28574-1-ehemily@amazon.de>
Date: Thu, 13 Nov 2025 19:16:08 +0000
From: Emily Ehlert <ehemily@...zon.de>
To: <lenb@...nel.org>
CC: <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>, Emily Ehlert
	<ehemily@...zon.com>
Subject: [PATCH 1/2] tools/power/turbostat: Set per_cpu_msr_sum to NULL after free

From: Emily Ehlert <ehemily@...zon.com>

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@...zon.com>
---
 tools/power/x86/turbostat/turbostat.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 72a280e7a9d5..9a2be201a3a6 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -6673,6 +6673,7 @@ void msr_sum_record(void)
 	timer_delete(timerid);
 release_msr:
 	free(per_cpu_msr_sum);
+	per_cpu_msr_sum = NULL;
 }
 
 /*
-- 
2.47.3




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