linux-kernel - [PATCH AUTOSEL for 4.14 48/51] perf tools: Fix leaking rec

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Message-ID: <20171122222526.20021-48-alexander.levin@verizon.com>
Date:   Wed, 22 Nov 2017 22:25:47 +0000
From:   alexander.levin@...izon.com
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     Martin Kepplinger <martink@...teo.de>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        alexander.levin@...izon.com
Subject: [PATCH AUTOSEL for 4.14 48/51] perf tools: Fix leaking rec_argv in
 error cases

From: Martin Kepplinger <martink@...teo.de>

[ Upstream commit c896f85a7c15ab9d040ffac8b8003e47996602a2 ]

Let's free the allocated rec_argv in case we return early, in order to
avoid leaking memory.

This adds free() at a few very similar places across the tree where it
was missing.

Signed-off-by: Martin Kepplinger <martink@...teo.de>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Martin kepplinger <martink@...teo.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Link: http://lkml.kernel.org/r/20170913191419.29806-1-martink@posteo.de
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
---
 tools/perf/builtin-c2c.c       | 1 +
 tools/perf/builtin-mem.c       | 1 +
 tools/perf/builtin-timechart.c | 4 +++-
 tools/perf/builtin-trace.c     | 1 +
 4 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index fd32ad08c6d4..d00aac51130d 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -2733,6 +2733,7 @@ static int perf_c2c__record(int argc, const char **argv)
 		if (!perf_mem_events[j].supported) {
 			pr_err("failed: event '%s' not supported\n",
 			       perf_mem_events[j].name);
+			free(rec_argv);
 			return -1;
 		}
 
diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c
index 4db960085273..e15efba605f6 100644
--- a/tools/perf/builtin-mem.c
+++ b/tools/perf/builtin-mem.c
@@ -113,6 +113,7 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
 		if (!perf_mem_events[j].supported) {
 			pr_err("failed: event '%s' not supported\n",
 			       perf_mem_events__name(j));
+			free(rec_argv);
 			return -1;
 		}
 
diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c
index 4e2e61695986..01de01ca14f2 100644
--- a/tools/perf/builtin-timechart.c
+++ b/tools/perf/builtin-timechart.c
@@ -1732,8 +1732,10 @@ static int timechart__io_record(int argc, const char **argv)
 	if (rec_argv == NULL)
 		return -ENOMEM;
 
-	if (asprintf(&filter, "common_pid != %d", getpid()) < 0)
+	if (asprintf(&filter, "common_pid != %d", getpid()) < 0) {
+		free(rec_argv);
 		return -ENOMEM;
+	}
 
 	p = rec_argv;
 	for (i = 0; i < common_args_nr; i++)
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index d5d7fff1c211..8e3c4ec00017 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -2086,6 +2086,7 @@ static int trace__record(struct trace *trace, int argc, const char **argv)
 			rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
 		else {
 			pr_err("Neither raw_syscalls nor syscalls events exist.\n");
+			free(rec_argv);
 			return -1;
 		}
 	}
-- 
2.11.0