Index: sys/boot/common/ufsread.c
===================================================================
--- sys/boot/common/ufsread.c
+++ sys/boot/common/ufsread.c
@@ -111,6 +111,10 @@
                                *ino = d->d_ino;
                                return d->d_type;
                        }
+                       /* Probable corrupt directory entry, bail out */
+                       if (d->d_reclen == 0)
+                               return 0;
+
                        s += d->d_reclen;
                }
        if (n != -1 && ls)