Bash process did not terminate after telnet logout.

Solution Unverified - Updated -

Issue

  • After telnet logout in.telnetd and login proccess terminated but bash proccess remained running with /dev/pts/X opened.
  • The following is result of lsof.
bash      13024     testuser    0u      CHR              136,0       0t0          3 /dev/pts/0 (deleted)
bash      13024     testuser    1u      CHR              136,0       0t0          3 /dev/pts/0 (deleted)
bash      13024     testuser    2u      CHR              136,0       0t0          3 /dev/pts/0 (deleted)
bash      13024     testuser  255u      CHR              136,0       0t0          3 /dev/pts/0 (deleted)
  • Finally, the customer became unable to login to remote server because of lack of /dev/pts/X resource.

Environment

  • Red Hat Enterprise Linux 4
  • Red Hat Enterprise Linux 5 may affect
  • Red Hat Enterprise Linux 6

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