Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.37 as permitted sender) client-ip=23.128.96.37;
Date:   Thu,  5 Oct 2023 16:08:41 -0700
In-Reply-To: <20231005230851.3666908-1-irogers@google.com>
Message-Id: <20231005230851.3666908-9-irogers@google.com>
Mime-Version: 1.0
References: <20231005230851.3666908-1-irogers@google.com>
Subject: [PATCH v2 08/18] 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>,
        Yicong Yang <yangyicong@hisilicon.com>,
        Jonathan Cameron <jonathan.cameron@huawei.com>,
        Yang Jihong <yangjihong1@huawei.com>,
        Kan Liang <kan.liang@linux.intel.com>,
        Ming Wang <wangming01@loongson.cn>,
        Huacai Chen <chenhuacai@kernel.org>,
        Sean Christopherson <seanjc@google.com>,
        K Prateek Nayak <kprateek.nayak@amd.com>,
        Yanteng Si <siyanteng@loongson.cn>,
        Yuan Can <yuancan@huawei.com>,
        Ravi Bangoria <ravi.bangoria@amd.com>,
        James Clark <james.clark@arm.com>, llvm@lists.linux.dev,
        linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
        bpf@vger.kernel.org
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

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