[Bug 1206370] Re: subshell that instantly locks up bash, dash, ksh, tcsh, and zsh

[B Bobo]

Since you've apparently locked down this report, so I can't re-open it,
I'm opening a new one.

This is the third time you've brushed away a security-related bug report
on completely spurious grounds. You're making more work for yourself and
for users of launchpad. Please stop doing that. It is not a productive
way of going about your work.

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https://bugs.launchpad.net/bugs/1206370

Title:
  subshell that instantly locks up bash, dash, ksh, tcsh, and zsh

Status in “bash” package in Ubuntu:
  Won't Fix
Status in “dash” package in Ubuntu:
  Won't Fix
Status in “ksh” package in Ubuntu:
  Won't Fix
Status in “tcsh” package in Ubuntu:
  Won't Fix
Status in “zsh” package in Ubuntu:
  Won't Fix

Bug description:
  Type this at a shell prompt in gnome-terminal:

  $ (yes&)
  y
  y
  y
  y
  y
  y
  ...

  Denial of service. Shell becomes totally unresponsive. Subshell
  command is uninterruptible.

  An old one that affects bash, dash, ksh, tcsh, and zsh shells at least
  in all versions in Ubuntu and further back in Ubuntu pre-history too.

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