[Bug 1179818] Re: recursively call shell script will freeze whole system

[qinghao]

more annoying, confirmed on another installation of ubuntu 9.04, same
result.

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Title:
  recursively call shell script will freeze whole system

Status in “bash” package in Ubuntu:
  Invalid

Bug description:
  run the following script will freeze the whole system. i made some mistakes when i write it. 
  but such a bad script should not freeze the whole system.

  <code>
  if test $# -gt t ;
  then
  echo 1; 
  else
      `basename $0` \<url\> \[new_filename\] 
  fi
  </code>

  it's not the first time that recursively call to script  freeze the system. 
  i didn't remember what  i have run the last time. but the results are the same.

  the  system became no responding to keyboard and mouse. 
  screen and windows content not update any more.

  i confirmed the SSH and CTRL+ALT+F# this time. both of them stuck or  60s timeout-ed.
  Ubuntu version: 12.04.1 amd64 server 
  Linux kernel version: 3.2.0-29-generic #46-Ubuntu SMP Fri Jul 27 17:03:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
  bash: 4.2-2ubuntu2 
  coreutils: 8.13-3ubuntu3

  
  i have confirmed this bug is vm (virtualbox) running the same version ubuntu, it  froze too.
  it will not terminate itself. your can cancel it will CTRL+C at the beginning seconds.
  after running for longer time it become not cancel-able and not accept the key input.

  i have tried another box running Fedora 15[1] , it has no such problem. and can be 
  canceled by  CTRL+C .  after running for longer time it will quit itself. 
  fedora version:Fedora 15 i686
  Linux version: 
  2.6.38.6-26.rc1.fc15.i686 #1 SMP Mon May 9 20:43:14 UTC 2011 i686 i686 i386 GNU/Linux
  bash-4.2.10-4.fc15.i686
  coreutils-8.10-2.fc15.i686

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