fortify-headers

commit e6837a7874a40d5fe78dd3edd5f6dab68d87a962
parent 03886aa26ca739f8458a54c663602ad09dc0a5b1
Author: sin <sin@2f30.org>
Date:   Fri, 30 Jan 2015 16:17:01 +0000

Add FD_{CLR,SET} checks

Diffstat:
A
include/sys/select.h
 | 
38
++++++++++++++++++++++++++++++++++++++

1 file changed, 38 insertions(+), 0 deletions(-)
diff --git a/include/sys/select.h b/include/sys/select.h
@@ -0,0 +1,38 @@
+/* See LICENSE file for copyright and license details. */
+#ifndef FORTIFY_SYS_SELECT_H_
+#define FORTIFY_SYS_SELECT_H_
+
+#include_next <sys/select.h>
+
+#if defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 && defined(__OPTIMIZE__) && __OPTIMIZE__ > 0
+
+static inline __attribute__ ((always_inline))
+int
+__fortify_FD_CLR(int fd, fd_set *set)
+{
+	size_t n = __builtin_object_size(set, 0);
+
+	if (fd < 0 || fd >= FD_SETSIZE || n < sizeof(fd_set))
+		__builtin_trap();
+	return FD_CLR(fd, set);
+}
+
+static inline __attribute__ ((always_inline))
+int
+__fortify_FD_SET(int fd, fd_set *set)
+{
+	size_t n = __builtin_object_size(set, 0);
+
+	if (fd < 0 || fd >= FD_SETSIZE || n < sizeof(fd_set))
+		__builtin_trap();
+	return FD_SET(fd, set);
+}
+
+#undef FD_CLR
+#define FD_CLR(fd, set) __fortify_FD_CLR(fd, set)
+#undef FD_SET
+#define FD_SET(fd, set) __fortify_FD_SET(fd, set)
+
+#endif
+
+#endif