linux-kernel - [PATCH v2 10/26] perf header: Ensure bitmaps are freed

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Message-Id: <20230608232823.4027869-11-irogers@google.com>
Date:   Thu,  8 Jun 2023 16:28:07 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     John Garry <john.g.garry@...cle.com>,
        Will Deacon <will@...nel.org>,
        James Clark <james.clark@....com>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        German Gomez <german.gomez@....com>,
        Ali Saidi <alisaidi@...zon.com>,
        Jing Zhang <renyu.zj@...ux.alibaba.com>,
        Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
        Miguel Ojeda <ojeda@...nel.org>,
        ye xingchen <ye.xingchen@....com.cn>,
        Liam Howlett <liam.howlett@...cle.com>,
        Dmitrii Dolgov <9erthalion6@...il.com>,
        Yang Jihong <yangjihong1@...wei.com>,
        K Prateek Nayak <kprateek.nayak@....com>,
        Changbin Du <changbin.du@...wei.com>,
        Ravi Bangoria <ravi.bangoria@....com>,
        Sean Christopherson <seanjc@...gle.com>,
        Andi Kleen <ak@...ux.intel.com>,
        "Steinar H. Gunderson" <sesse@...gle.com>,
        Yuan Can <yuancan@...wei.com>,
        Brian Robbins <brianrob@...ux.microsoft.com>,
        liuwenyu <liuwenyu7@...wei.com>,
        Ivan Babrou <ivan@...udflare.com>,
        Fangrui Song <maskray@...gle.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-perf-users@...r.kernel.org, coresight@...ts.linaro.org
Subject: [PATCH v2 10/26] perf header: Ensure bitmaps are freed

memory_node bitmaps need a bitmap_free to avoid memory leaks. Caught
by leak sanitizer.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/util/header.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index d85b39079c31..3db7c1fae71e 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1389,6 +1389,14 @@ static int memory_node__read(struct memory_node *n, unsigned long idx)
 	return 0;
 }
 
+static void memory_node__delete_nodes(struct memory_node *nodesp, u64 cnt)
+{
+	for (u64 i = 0; i < cnt; i++)
+		bitmap_free(nodesp[i].set);
+
+	free(nodesp);
+}
+
 static int memory_node__sort(const void *a, const void *b)
 {
 	const struct memory_node *na = a;
@@ -1449,7 +1457,7 @@ static int build_mem_topology(struct memory_node **nodesp, u64 *cntp)
 		*nodesp = nodes;
 		qsort(nodes, cnt, sizeof(nodes[0]), memory_node__sort);
 	} else
-		free(nodes);
+		memory_node__delete_nodes(nodes, cnt);
 
 	return ret;
 }
@@ -1516,7 +1524,7 @@ static int write_mem_topology(struct feat_fd *ff __maybe_unused,
 	}
 
 out:
-	free(nodes);
+	memory_node__delete_nodes(nodes, nr);
 	return ret;
 }
 
-- 
2.41.0.162.gfafddb0af9-goog