ftrace: Free ftrace hashes after they are replaced in the subops code

The subops processing creates new hashes when adding and removing subops.
There were some places that the old hashes that were replaced were not
freed and this caused some memory leaks.

Cc: Masami Hiramatsu <[e-mail]>
Cc: Mark Rutland <[e-mail]>
Cc: Mathieu Desnoyers <[e-mail]>
Link: https://lore.kernel.org/[e-mail]
Fixes: 0ae6b8ce200d ("ftrace: Fix accounting of subop hashes")
Signed-off-by: Steven Rostedt (Google) <[e-mail]>

kernel/trace/ftrace.c

···
 			}
 		}
 
+		free_ftrace_hash(temp_hash.filter_hash);
+		free_ftrace_hash(temp_hash.notrace_hash);
+
 		temp_hash.filter_hash = *filter_hash;
 		temp_hash.notrace_hash = *notrace_hash;
 	}
···
 	}
 
 	ret = rebuild_hashes(&filter_hash, &notrace_hash, ops);
-	if (!ret)
+	if (!ret) {
 		ret = ftrace_update_ops(ops, filter_hash, notrace_hash);
+		free_ftrace_hash(filter_hash);
+		free_ftrace_hash(notrace_hash);
+	}
 
 	if (ret) {
 		/* Put back the original hash */