fortify-headers

commit 4a18008ce14b77be67ed0b5f0e27b4db3db5beb8
parent 3d159480208ecad607490f513784a3a68f817f42
Author: sin <sin@2f30.org>
Date:   Thu, 29 Jan 2015 12:14:06 +0000

Add bzero() checks

Diffstat:
M
include/strings.h
 | 
14
++++++++++++++

1 file changed, 14 insertions(+), 0 deletions(-)
diff --git a/include/strings.h b/include/strings.h
@@ -21,8 +21,22 @@ __fortify_bcopy(const void *__restrict src, void *__restrict dest, size_t n)
 	return bcopy(src, dest, n);
 }
 
+static inline __attribute__ ((always_inline))
+void
+__fortify_bzero(void *src, size_t n)
+{
+	size_t bos = __builtin_object_size(src, 0);
+
+	if (n > bos)
+		__builtin_trap();
+	return bzero(src, n);
+}
+
 #undef bcopy
 #define bcopy(src, dest, n) __fortify_bcopy(src, dest, n)
+#undef bzero
+#define bzero(src, n) __fortify_bzero(src, n)
+
 #endif
 
 #endif