Add hardening for select()

This is unlikely to be used, since fd_set is
usually manipulated by macros, but it doesn't hurt
to add a simple comparison.

1 files changed, 16 insertions, 0 deletions

diff --git a/tests/test_select_static.c b/tests/test_select_static.c
new file mode 100644
index 0000000..c2abf7f
--- /dev/null
+++ b/tests/test_select_static.c
@@ -0,0 +1,16 @@
+#include "common.h"
+
+#include <sys/select.h>
+
+int main(int argc, char** argv) {
+#if !defined(__clang__)
+  fd_set rfds;
+
+  CHK_FAIL_START
+  select(1337, &rfds, NULL, NULL, NULL);
+  CHK_FAIL_END
+
+  puts((const char*)&rfds);
+#endif
+  return ret;
+}