linux-kernel - [PATCH 1/5] perf tools kvm: Add missed memory allocation check and free

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Message-Id: <20250805004633.135904-2-dapeng1.mi@linux.intel.com>
Date: Tue,  5 Aug 2025 08:46:29 +0800
From: Dapeng Mi <dapeng1.mi@...ux.intel.com>
To: Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Kan Liang <kan.liang@...ux.intel.com>
Cc: linux-perf-users@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Kevin Tian <kevin.tian@...el.com>,
	Dapeng Mi <dapeng1.mi@...el.com>,
	Dapeng Mi <dapeng1.mi@...ux.intel.com>
Subject: [PATCH 1/5] perf tools kvm: Add missed memory allocation check and free

Current code allocates rec_argv[] array, but doesn't check if the
allocation is successful and explicitly free the rec_argv[] array.

Add them back.

Signed-off-by: Dapeng Mi <dapeng1.mi@...ux.intel.com>
---
 tools/perf/builtin-kvm.c | 29 +++++++++++++++++++++++------
 1 file changed, 23 insertions(+), 6 deletions(-)

diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 7b15b4a705e4..f78a67a199ff 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -1719,7 +1719,9 @@ kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
 	set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED);
 
 	record_usage = kvm_stat_record_usage;
-	return cmd_record(i, rec_argv);
+	ret = cmd_record(i, rec_argv);
+	free(rec_argv);
+	return ret;
 }
 
 static int
@@ -2006,6 +2008,9 @@ static int __cmd_record(const char *file_name, int argc, const char **argv)
 
 	rec_argc = argc + 2;
 	rec_argv = calloc(rec_argc + 1, sizeof(char *));
+	if (!rec_argv)
+		return -ENOMEM;
+
 	rec_argv[i++] = strdup("record");
 	rec_argv[i++] = strdup("-o");
 	rec_argv[i++] = strdup(file_name);
@@ -2014,16 +2019,21 @@ static int __cmd_record(const char *file_name, int argc, const char **argv)
 
 	BUG_ON(i != rec_argc);
 
-	return cmd_record(i, rec_argv);
+	ret = cmd_record(i, rec_argv);
+	free(rec_argv);
+	return ret;
 }
 
 static int __cmd_report(const char *file_name, int argc, const char **argv)
 {
-	int rec_argc, i = 0, j;
+	int rec_argc, i = 0, j, ret;
 	const char **rec_argv;
 
 	rec_argc = argc + 2;
 	rec_argv = calloc(rec_argc + 1, sizeof(char *));
+	if (!rec_argv)
+		return -ENOMEM;
+
 	rec_argv[i++] = strdup("report");
 	rec_argv[i++] = strdup("-i");
 	rec_argv[i++] = strdup(file_name);
@@ -2032,17 +2042,22 @@ static int __cmd_report(const char *file_name, int argc, const char **argv)
 
 	BUG_ON(i != rec_argc);
 
-	return cmd_report(i, rec_argv);
+	ret = cmd_report(i, rec_argv);
+	free(rec_argv);
+	return ret;
 }
 
 static int
 __cmd_buildid_list(const char *file_name, int argc, const char **argv)
 {
-	int rec_argc, i = 0, j;
+	int rec_argc, i = 0, j, ret;
 	const char **rec_argv;
 
 	rec_argc = argc + 2;
 	rec_argv = calloc(rec_argc + 1, sizeof(char *));
+	if (!rec_argv)
+		return -ENOMEM;
+
 	rec_argv[i++] = strdup("buildid-list");
 	rec_argv[i++] = strdup("-i");
 	rec_argv[i++] = strdup(file_name);
@@ -2051,7 +2066,9 @@ __cmd_buildid_list(const char *file_name, int argc, const char **argv)
 
 	BUG_ON(i != rec_argc);
 
-	return cmd_buildid_list(i, rec_argv);
+	ret = cmd_buildid_list(i, rec_argv);
+	free(rec_argv);
+	return ret;
 }
 
 int cmd_kvm(int argc, const char **argv)
-- 
2.34.1