ipkg remove vsftpd 
Removing package vsftpd from root...
mini_fo_rmdir: ERROR, invalid state detected.
mini_fo_lookup: ERROR, meta data corruption detected.
ASSERTION FAILED: dtopd(dentry) != NULL at aux.c:99 (check_mini_fo_dentry)
Unable to handle kernel paging request at virtual address 00000000, epc == c00cd3c4, ra == c00cd3c4
Oops in fault.c::do_page_fault, line 206:
$0 : 00000000 10009d00 0000004e 80e72000 801aeaf0 00000001 00000001 801aeb00
$8 : 00000000 0000124b 0000124b 000011fd 801c0000 801c0000 801c0000 ffffffff
$16: 00000000 8089d520 8089d520 8084ada0 8084ada0 80286000 8089d520 8084ada0
$24: 00000002 00000001                   80974000 80975df0 8084ada0 c00cd3c4
Hi : 00000000
Lo : 00000059
epc   : c00cd3c4    Tainted: P 
Status: 10009d03
Cause : 3080000c
PrId  : 00019064
Process ipkg (pid: 579, stackpage=80974000)
Stack:    801c0000 c00d0be8 c00d0bb8 00000063 c00ce7b0 00000039 c00cd330
 8089db20 c00c99b4 80059f08 8008b130 00000004 c00cfca1 80975ee8 80089cbc
 8084a6dc 00000006 8089d420 fffffff0 8084ae30 8084ae30 8084ada0 8084ada0
 80286000 8089d520 8089db20 00000001 8008dbe4 00000000 80975ee8 fffffff4
 8089d520 8089d520 8084ada0 8084ada0 808ba440 808ba440 80286000 803b3000
 80975ee8 ...
Call Trace:   [<c00d0be8>] [<c00d0bb8>] [<c00ce7b0>] [<c00cd330>] [<c00c99b4>]
 [<80059f08>] [<8008b130>] [<c00cfca1>] [<80089cbc>] [<8008dbe4>] [<8008dd7c>]
 [<8008af9c>] [<8008dfd8>] [<8005eb70>] [<8007f180>] [<80042744>] [<80048a60>]
 [<8016ea48>] [<800a20fc>]

Code: 24429d24  0040f809  00000000 <a2000000> 8e240058  8c820000  14400013  8fbf0020  8c900004 
Segmentation fault