1 files changed, 22 insertions, 0 deletions
diff --git a/test/asan/TestCases/Linux/printf-fortify-4.c b/test/asan/TestCases/Linux/printf-fortify-4.c
new file mode 100644
index 000000000..57ec42f38
--- /dev/null
+++ b/test/asan/TestCases/Linux/printf-fortify-4.c
@@ -0,0 +1,22 @@
+// RUN: %clang -fPIC -shared -O2 -D_FORTIFY_SOURCE=2 -D_DSO %s -o %t.so
+// RUN: %clang_asan %s -o %t %t.so
+// RUN: not %run %t 2>&1 | FileCheck %s
+// UNSUPPORTED: android
+#ifdef _DSO
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+__attribute__((noinline)) char foo(const char *format, ...) {
+  char *write_buffer = (char *)malloc(1);
+  va_list ap;
+  va_start(ap, format);
+  // CHECK: AddressSanitizer: heap-buffer-overflow
+  vsnprintf(write_buffer, 4096, format, ap);
+  va_end(ap);
+  return write_buffer[0];
+}
+#else
+extern int foo(const char *format, ...);
+int main() { return foo("%s_%s", "one", "two"); }
+#endif