perf probe: Fix an error handling path in 'parse_perf_probe_command()'

If a memory allocation fail, we should branch to the error handling path
in order to free some resources allocated a few lines above.

Fixes: 15354d5 ("perf probe: Generate event name with line number")
Signed-off-by: Christophe JAILLET <[email protected]>
Acked-by: Masami Hiramatsu <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: [email protected]
Cc: Mark Rutland <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: https://lore.kernel.org/r/b71bcb01fa0c7b9778647235c3ab490f699ba278.1659797452.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

Author: tititiou36

tools/perf/util/probe-event.c

@@ -1775,8 +1775,10 @@ int parse_perf_probe_command(const char *cmd, struct perf_probe_event *pev)
 	if (!pev->event && pev->point.function && pev->point.line
 			&& !pev->point.lazy_line && !pev->point.offset) {
 		if (asprintf(&pev->event, "%s_L%d", pev->point.function,
-			pev->point.line) < 0)
-			return -ENOMEM;
+			pev->point.line) < 0) {
+			ret = -ENOMEM;
+			goto out;
+		}
 	}
 
 	/* Copy arguments and ensure return probe has no C argument */