src/util.c: Tolerate be given a NULL pointer

2 files changed, 14 insertions, 0 deletions

diff --git a/src/util.c b/src/util.c
index c0498aa..7e62755 100644
--- a/src/util.c
+++ b/src/util.c
@@ -21,6 +21,10 @@ EXIT_USAGE = 2;
 
 void
 freeit(const void **const ptr) {
+	if (ptr == NULL) {
+		return;
+	}
+
 	free((void *)*ptr);
 	*ptr = NULL;
 }
diff --git a/tests/util.c b/tests/util.c
index bc85b70..a720123 100644
--- a/tests/util.c
+++ b/tests/util.c
@@ -41,6 +41,16 @@ test_freeit(void) {
 
 		test_ok();
 	}
+	{
+		testing("tolerate be given a NULL pointer");
+
+		void *p = NULL;
+		freeit(NULL);
+		freeit(p);
+		freeit((void *)&p);
+
+		test_ok();
+	}
 
 	rc = 0;
 out: