[PATCH] tools: perf: fix leaking rec_argv in error cases

[Martin Kepplinger]

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 <mart...@posteo.de>
---
 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 475999e48f66..bb1ee22bd221 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -2732,6 +2732,7 @@ 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 0f15634ef82c..6940490bc3f9 100644
--- a/tools/perf/builtin-mem.c
+++ b/tools/perf/builtin-mem.c
@@ -112,6 +112,7 @@ 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 771ddab94bb0..dd8eec4c755c 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -2078,6 +2078,7 @@ 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