check accept actually succeeded

ChangeLog

@@ -1,8 +1,14 @@
-v1.23.0:
+
+v1.23.x:
 	Obsolete. Please use v2.0 or above. This is a branch
 	where no new features will be introduced, only
 	bugfixes to versions below 1.22.
 
+v1.23.1:
+	Check accept() for failure in sslh-fork. Aborted
+	connections otherwise result in crashes.
+
+v1.23.0:
 	Reintroduce --ssl as alias to --tls.
 
 

sslh-fork.c

@@ -179,6 +179,7 @@ void tcp_listener(struct listen_endpoint* endpoint, int num_endpoints, int activ
 
     while (1) {
         in_socket = accept(endpoint[active_endpoint].socketfd, 0, 0);
+        if (in_socket == -1) continue;
         if (cfg.verbose) fprintf(stderr, "accepted fd %d\n", in_socket);
 
         switch(fork()) {