if (e) {
int status_errno;
- if (safe_atoi(e + 6, &status_errno) < 0)
+ if (safe_atoi(e + 6, &status_errno) < 0 || status_errno < 0)
log_warning_unit(u->id, "Failed to parse ERRNO= field in notification message: %s", e);
else {
log_debug_unit(u->id, "%s: got %s", u->id, e);