Add send() check

1 files changed, 13 insertions, 0 deletions

diff --git a/include/sys/socket.h b/include/sys/socket.h
index 85ba63b..4dc228e 100644
--- 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