If a memory allocation fails then the strdup-ed string needs
freeing. Detected by clang-tidy.

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

diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index fa7419978353..a3ff2f4edbaa 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -2478,6 +2478,7 @@ static int parse_call_stack(const struct option *opt __maybe_unused, const char
 		entry = malloc(sizeof(*entry) + strlen(tok) + 1);
 		if (entry == NULL) {
 			pr_err("Memory allocation failure\n");
+			free(s);
 			return -1;
 		}
 
-- 
2.42.0.609.gbb76f46606-goog