fortify-headers

commit d8afaf63d24933f6e1706c4019155b8e09fe9d32
parent eb7c60712c85bfea0f4265219d1f457d144984ff
Author: sin <sin@2f30.org>
Date:   Tue, 24 Feb 2015 19:37:25 +0000

Add send() check

Diffstat:
M
include/sys/socket.h
 | 
13
+++++++++++++

1 file changed, 13 insertions(+), 0 deletions(-)
diff --git a/include/sys/socket.h b/include/sys/socket.h
@@ -27,10 +27,23 @@ __fortify_recvfrom(int sockfd, void *buf, size_t n, int flags, struct sockaddr *
 	return recvfrom(sockfd, buf, n, flags, sa, salen);
 }
 
+static inline __attribute__ ((always_inline))
+ssize_t
+__fortify_send(int sockfd, const void *buf, size_t n, int flags)
+{
+	size_t bos = __builtin_object_size(buf, 0);
+
+	if (n > bos)
+		__builtin_trap();
+	return send(sockfd, buf, n, flags);
+}
+
 #undef recv
 #define recv(sockfd, buf, n, flags) __fortify_recv(sockfd, buf, n, flags)
 #undef recvfrom
 #define recvfrom(sockfd, buf, n, flags, sa, salen) __fortify_recvfrom(sockfd, buf, n, flags, sa, salen)
+#undef send
+#define send(sockfd, buf, n, flags) __fortify_send(sockfd, buf, n, flags)
 
 #endif