1 files changed, 28 insertions, 0 deletions
diff --git a/libgo/misc/cgo/testsanitizers/testdata/asan1_fail.go b/libgo/misc/cgo/testsanitizers/testdata/asan1_fail.go
new file mode 100644
index 00000000000..80289e5c304
--- /dev/null
+++ b/libgo/misc/cgo/testsanitizers/testdata/asan1_fail.go
@@ -0,0 +1,28 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+/*
+#include <stdlib.h>
+#include <stdio.h>
+
+int *p;
+int* test() {
+ p = (int *)malloc(2 * sizeof(int));
+ free(p);
+ return p;
+}
+*/
+import "C"
+import "fmt"
+
+func main() {
+	// C passes Go an invalid pointer.
+	a := C.test()
+	// Use after free
+	*a = 2 // BOOM
+	// We shouldn't get here; asan should stop us first.
+	fmt.Println(*a)
+}