panic: ufs_rename: lost dir entry Starting stack trace... panic(ffffffff83457894) at panic+464 ufs_rename(ffff80002a2f4bd8) at ufs_rename+5983 VOP_RENAME(fffffd8072f3d988,fffffd80681793a8,ffff80002a2f4da8,fffffd8072f3d988,0,ffff80002a2f4cf8) at VOP_RENAME+311 dorenameat(ffff80002b416d40,ffffff9c,200000000040,ffffff9c,200000000100) at dorenameat+1015 syscall(ffff80002a2f4f40) at syscall+2839 Xsyscall() at Xsyscall+296 end of kernel end trace frame: 0x736553a6650, count: 251 End of stack trace.