linux-kernel - [PATCH] cpupower: fix memory leak in print_{on,off}line

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Message-Id: <20250827-power-memoryleak-v1-1-e4baf7b59a41@uniontech.com>
Date: Wed, 27 Aug 2025 17:46:04 +0800
From: Cryolitia PukNgae via B4 Relay <devnull+cryolitia.uniontech.com@...nel.org>
To: Thomas Renninger <trenn@...e.com>, Shuah Khan <shuah@...nel.org>, 
 "John B. Wyatt IV" <jwyatt@...hat.com>, John Kacur <jkacur@...hat.com>
Cc: linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org, 
 niecheng1@...ontech.com, zhanjun@...ontech.com, 
 Cryolitia PukNgae <cryolitia@...ontech.com>
Subject: [PATCH] cpupower: fix memory leak in print_{on,off}line_cpus()

From: Cryolitia PukNgae <cryolitia@...ontech.com>

{on,off}online_cpus_str not free after use

Suggested-by: Jun Zhan <zhanjun@...ontech.com>
Signed-off-by: Cryolitia PukNgae <cryolitia@...ontech.com>
---
 tools/power/cpupower/utils/helpers/misc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/power/cpupower/utils/helpers/misc.c b/tools/power/cpupower/utils/helpers/misc.c
index 166dc1e470ea6d70079fea6570750885d549603a..f3b4fe95520ff96a1be8b1ba8e7be1ec116b1bc0 100644
--- a/tools/power/cpupower/utils/helpers/misc.c
+++ b/tools/power/cpupower/utils/helpers/misc.c
@@ -213,6 +213,8 @@ void print_online_cpus(void)
 		bitmask_displaylist(online_cpus_str, str_len, online_cpus);
 		printf(_("Following CPUs are online:\n%s\n"), online_cpus_str);
 	}
+
+	free(online_cpus_str);
 }

 /* print_offline_cpus
@@ -232,6 +234,8 @@ void print_offline_cpus(void)
 		printf(_("Following CPUs are offline:\n%s\n"), offline_cpus_str);
 		printf(_("cpupower set operation was not performed on them\n"));
 	}
+
+	free(offline_cpus_str);
 }

 /*

---
base-commit: fab1beda7597fac1cecc01707d55eadb6bbe773c
change-id: 20250827-power-memoryleak-75c692220277

Best regards,
-- 
Cryolitia PukNgae <cryolitia@...ontech.com>