[Bug 7832] New: [ftpd] When login the ftpd server, there are many zombie processes

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=7832

           Summary: [ftpd] When login the ftpd server, there are many
                    zombie processes
           Product: Busybox
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P5
         Component: Networking
        AssignedTo: unassigned at busybox.net
        ReportedBy: reddy_quan at sina.com
                CC: busybox-cvs at busybox.net
   Estimated Hours: 0.0


Created attachment 5822
  --> https://bugs.busybox.net/attachment.cgi?id=5822
txt log

Busybox Version: busybox-1.23.0
Hi,
This is busybox-1.23.0 build on Ubuntu 12.04.4 LTS, I test it on win7 by login
from explorer, it is ok, but I noticed that there are many zombie processes
come out.

Here is a log:
root at machine:/home/reddy/test/busybox-1.23.0# ps aux|grep busybox
root       990  0.0  0.0  60060  1900 pts/2    S    17:16   0:00 sudo ./busybox
tcpsvd -E 0.0.0.0 21 ./busybox ftpd -w -t60000 -T600000 -vv /home/reddy
root       991  0.0  0.0   8196   444 pts/2    S    17:16   0:00 ./busybox
tcpsvd -E 0.0.0.0 21 ./busybox ftpd -w -t60000 -T600000 -vv /home/reddy
root       996  0.0  0.0   8200   852 pts/2    S    17:17   0:00 ./busybox ftpd
-w -t60000 -T600000 -vv /home/reddy
root      1002  0.0  0.0   8200   892 pts/2    S    17:17   0:00 ./busybox ftpd
-w -t60000 -T600000 -vv /home/reddy
root      1003  0.0  0.0      0     0 pts/2    Z    17:17   0:00 [busybox]
<defunct>
root      1004  0.0  0.0      0     0 pts/2    Z    17:17   0:00 [busybox]
<defunct>
root      1005  0.0  0.0      0     0 pts/2    Z    17:17   0:00 [busybox]
<defunct>
root      1006  0.0  0.0      0     0 pts/2    Z    17:17   0:00 [busybox]
<defunct>
root      1010  0.0  0.0      0     0 pts/2    Z    17:18   0:00 [busybox]
<defunct>
root      1011  0.0  0.0      0     0 pts/2    Z    17:18   0:00 [busybox]
<defunct>
root      1012  0.0  0.0      0     0 pts/2    Z    17:18   0:00 [busybox]
<defunct>
root      1013  0.0  0.0      0     0 pts/2    Z    17:18   0:00 [busybox]
<defunct>
root      1016  0.0  0.0  13596   936 pts/2    S+   17:18   0:00 grep
--color=auto busybox
root at machine:/home/reddy/test/busybox-1.23.0# ps aux|grep busybox
root       990  0.0  0.0  60060  1900 pts/2    S    17:16   0:00 sudo ./busybox
tcpsvd -E 0.0.0.0 21 ./busybox ftpd -w -t60000 -T600000 -vv /home/reddy
root       991  0.0  0.0   8196   444 pts/2    S    17:16   0:00 ./busybox
tcpsvd -E 0.0.0.0 21 ./busybox ftpd -w -t60000 -T600000 -vv /home/reddy
root       996  0.0  0.0   8200   852 pts/2    S    17:17   0:00 ./busybox ftpd
-w -t60000 -T600000 -vv /home/reddy
root      1018  0.0  0.0  13596   940 pts/2    S+   17:18   0:00 grep
--color=auto busybox
root at machine:/home/reddy/test/busybox-1.23.0#

These zombies won't disappear before I logout the ftp server. I believe this is
a bug.

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