syscalls: random fixes

kernel-src/sys/syscalls/poll.c

@@ -48,11 +48,11 @@ syscallret_t syscall_poll(context_t *, pollfd_t *fds, size_t nfds, int timeoutms
 	size_t eventcount = 0;
 
 	for (uintmax_t i = 0; i < nfds; ++i) {
+		fdsbuff[i].revents = 0;
+
 		// negative fds are ignored and return nothing
-		if (fdsbuff[i].fd < 0) {
-			fdsbuff[i].revents = 0;
+		if (fdsbuff[i].fd < 0)
 			continue;
-		}
 
 		file_t *file = fd_get(fdsbuff[i].fd);
 		if (file == NULL) {

kernel-src/sys/syscalls/utime.c

@@ -10,6 +10,11 @@ syscallret_t syscall_utimensat(context_t *, int fd, char *upath, timespec_t uts[
 		.ret = -1
 	};
 
+	if (flags != 0) {
+		ret.errno = EINVAL;
+		return ret;
+	}
+
 	timespec_t ts[2];
 	if (uts == NULL)
 		ts[0] = ts[1] = timekeeper_time();