} else if (startswith(l, "kdbus-fd=")) {
int fd;
- if (safe_atoi(l + 9, &fd) < 0 || !fdset_contains(fds, fd))
+ if (safe_atoi(l + 9, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
log_debug("Failed to parse kdbus fd: %s", l + 9);
else {
if (m->kdbus_fd >= 0)