linux-kernel - [PATCH v1] perf vdso: Missed put on 32-bit dsos

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Message-Id: <20240912182757.762369-1-irogers@google.com>
Date: Thu, 12 Sep 2024 11:27:57 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	Kan Liang <kan.liang@...ux.intel.com>, linux-perf-users@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: [PATCH v1] perf vdso: Missed put on 32-bit dsos

If the dso type doesn't match then NULL is returned but the dso should
be put first.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/util/vdso.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/vdso.c b/tools/perf/util/vdso.c
index 1b6f8f6db7aa..c12f5d8c4bf6 100644
--- a/tools/perf/util/vdso.c
+++ b/tools/perf/util/vdso.c
@@ -308,8 +308,10 @@ static struct dso *machine__find_vdso(struct machine *machine,
 		if (!dso) {
 			dso = dsos__find(&machine->dsos, DSO__NAME_VDSO,
 					 true);
-			if (dso && dso_type != dso__type(dso, machine))
+			if (dso && dso_type != dso__type(dso, machine)) {
+				dso__put(dso);
 				dso = NULL;
+			}
 		}
 		break;
 	case DSO__TYPE_X32BIT:
-- 
2.46.0.662.g92d0881bb0-goog