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Date:   Mon,  9 Oct 2023 11:39:09 -0700
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Subject: [PATCH v3 07/18] perf jitdump: Avoid memory leak
From:   Ian Rogers <irogers@google.com>
To:     Nathan Chancellor <nathan@kernel.org>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Tom Rix <trix@redhat.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@kernel.org>,
        Namhyung Kim <namhyung@kernel.org>,
        Ian Rogers <irogers@google.com>,
        Adrian Hunter <adrian.hunter@intel.com>,
        Yang Jihong <yangjihong1@huawei.com>,
        Huacai Chen <chenhuacai@kernel.org>,
        Ming Wang <wangming01@loongson.cn>,
        Kan Liang <kan.liang@linux.intel.com>,
        Ravi Bangoria <ravi.bangoria@amd.com>, llvm@lists.linux.dev,
        linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
        bpf@vger.kernel.org
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jit_repipe_unwinding_info is called in a loop by jit_process_dump,
avoid leaking unwinding_data by free-ing before overwriting. Error
detected by clang-tidy.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/util/jitdump.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/jitdump.c b/tools/perf/util/jitdump.c
index 6b2b96c16ccd..1f657ef8975f 100644
--- a/tools/perf/util/jitdump.c
+++ b/tools/perf/util/jitdump.c
@@ -675,6 +675,7 @@ jit_repipe_unwinding_info(struct jit_buf_desc *jd, union jr_entry *jr)
 	jd->eh_frame_hdr_size = jr->unwinding.eh_frame_hdr_size;
 	jd->unwinding_size = jr->unwinding.unwinding_size;
 	jd->unwinding_mapped_size = jr->unwinding.mapped_size;
+	free(jd->unwinding_data);
 	jd->unwinding_data = unwinding_data;
 
 	return 0;
-- 
2.42.0.609.gbb76f46606-goog