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From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: acme@kernel.org
Cc: suzuki.poulose@arm.com, peterz@infradead.org,
	linux-kernel@vger.kernel.org, mingo@redhat.com,
	leo.yan@linaro.org, jolsa@redhat.com,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH 05/13] perf tools: Fix memory leak in error path
Date: Tue, 12 Feb 2019 10:16:10 -0700
Message-ID: <20190212171618.25355-6-mathieu.poirier@linaro.org> (raw)
In-Reply-To: <20190212171618.25355-1-mathieu.poirier@linaro.org>

Memory allocated for variable 't_params' isn't released properly in the
error path of function cs_etm_queue *cs_etm__alloc_queue() and
cs_etm__dump_event(), something this patch addresses.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
---
 tools/perf/util/cs-etm.c | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index 3011c6cae531..aac07f950074 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -175,6 +175,10 @@ static void cs_etm__dump_event(struct cs_etm_auxtrace *etm,
 
 	/* Use metadata to fill in trace parameters for trace decoder */
 	t_params = zalloc(sizeof(*t_params) * etm->num_cpu);
+
+	if (!t_params)
+		return;
+
 	for (i = 0; i < etm->num_cpu; i++) {
 		if (etm->metadata[i][CS_ETM_MAGIC] == __perf_cs_etmv3_magic) {
 			u32 etmidr = etm->metadata[i][CS_ETM_ETMIDR];
@@ -206,14 +210,12 @@ static void cs_etm__dump_event(struct cs_etm_auxtrace *etm,
 	/* Set decoder parameters to simply print the trace packets */
 	if (cs_etm__init_decoder_params(&d_params, NULL,
 					CS_ETM_OPERATION_PRINT))
-		return;
+		goto out_free;
 
 	decoder = cs_etm_decoder__new(etm->num_cpu, &d_params, t_params);
 
-	zfree(&t_params);
-
 	if (!decoder)
-		return;
+		goto out_free;
 	do {
 		size_t consumed;
 
@@ -228,6 +230,9 @@ static void cs_etm__dump_event(struct cs_etm_auxtrace *etm,
 	} while (buffer_used < buffer->size);
 
 	cs_etm_decoder__free(decoder);
+
+out_free:
+	zfree(&t_params);
 }
 
 static int cs_etm__flush_events(struct perf_session *session,
@@ -379,7 +384,7 @@ static struct cs_etm_queue *cs_etm__alloc_queue(struct cs_etm_auxtrace *etm,
 {
 	int i;
 	struct cs_etm_decoder_params d_params;
-	struct cs_etm_trace_params  *t_params;
+	struct cs_etm_trace_params  *t_params = NULL;
 	struct cs_etm_queue *etmq;
 	size_t szp = sizeof(struct cs_etm_packet);
 
@@ -461,8 +466,6 @@ static struct cs_etm_queue *cs_etm__alloc_queue(struct cs_etm_auxtrace *etm,
 
 	etmq->decoder = cs_etm_decoder__new(etm->num_cpu, &d_params, t_params);
 
-	zfree(&t_params);
-
 	if (!etmq->decoder)
 		goto out_free;
 
@@ -475,6 +478,8 @@ static struct cs_etm_queue *cs_etm__alloc_queue(struct cs_etm_auxtrace *etm,
 					      cs_etm__mem_access))
 		goto out_free_decoder;
 
+	zfree(&t_params);
+
 	etmq->offset = 0;
 	etmq->period_instructions = 0;
 
@@ -483,6 +488,7 @@ static struct cs_etm_queue *cs_etm__alloc_queue(struct cs_etm_auxtrace *etm,
 out_free_decoder:
 	cs_etm_decoder__free(etmq->decoder);
 out_free:
+	zfree(&t_params);
 	zfree(&etmq->event_buf);
 	zfree(&etmq->last_branch);
 	zfree(&etmq->last_branch_rb);
-- 
2.17.1


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  parent reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-12 17:16 [PATCH 00/13] perf tools: CoreSight code cleanup and refactoring Mathieu Poirier
2019-02-12 17:16 ` [PATCH 01/13] perf tools: Remove unused structure field "state" Mathieu Poirier
2019-02-12 17:16 ` [PATCH 02/13] perf tools: Remove unused structure field "time" and "timestamp" Mathieu Poirier
2019-02-12 17:16 ` [PATCH 03/13] perf tools: Fix wrong return values in error path Mathieu Poirier
2019-02-12 17:16 ` [PATCH 04/13] perf tools: Introducing function cs_etm_decoder__init_dparams() Mathieu Poirier
2019-02-12 17:16 ` Mathieu Poirier [this message]
2019-02-12 17:16 ` [PATCH 06/13] perf tools: Introducing function cs_etm__init_trace_params() Mathieu Poirier
2019-02-12 17:16 ` [PATCH 07/13] perf tools: Fix erroneous comment Mathieu Poirier
2019-02-12 17:16 ` [PATCH 08/13] perf tools: Cleaning up function cs_etm__alloc_queue() Mathieu Poirier
2019-02-12 17:16 ` [PATCH 09/13] perf tools: Rethink kernel address initialisation Mathieu Poirier
2019-02-12 17:16 ` [PATCH 10/13] perf tools: Make cs_etm__run_decoder() queue independent Mathieu Poirier
2019-02-12 17:16 ` [PATCH 11/13] perf tools: Modularize main decoder function Mathieu Poirier
2019-02-12 17:16 ` [PATCH 12/13] perf tools: Modularize main packet processing loop Mathieu Poirier
2019-02-12 17:16 ` [PATCH 13/13] perf tools: Modularize auxtrace_buffer fetch function Mathieu Poirier

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