[patch] latency_hist: fix small memory leak

[Dan Carpenter]

index_ptr needs to be freed on the error path.

Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>

diff --git a/kernel/trace/latency_hist.c b/kernel/trace/latency_hist.c
index b3b5ea2..8edc70c 100644
--- a/kernel/trace/latency_hist.c
+++ b/kernel/trace/latency_hist.c
@@ -204,8 +204,10 @@ static void *l_start(struct seq_file *m, loff_t *pos)
 			   , my_hist->beyond_hist_bound_samples
 			   , MAX_ENTRY_NUM, "samples");
 	}
-	if (index >= MAX_ENTRY_NUM)
+	if (index >= MAX_ENTRY_NUM) {
+		kfree(index_ptr);
 		return NULL;
+	}
 
 	*index_ptr = index;
 	return index_ptr;
--
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