Re: possible stack flow in bash

From: strangeat_private
Date: Sat Jun 29 2002 - 07:50:03 PDT

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In reply to: Junior: "possible stack flow in bash"
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On Fri, Jun 28, 2002 at 04:03:27PM +0000, Junior wrote:
> hi.
> Stack in bash stows observing possible.
> 
> Step 1 - bash-2.05a# ls "!x123456"
  ...
> bash: /bin/ls: Argument list too long
> Step 2 - bash-2.05a# ls "!x123456"
  ...
> bash: xrealloc: cannot reallocate 134322944 bytes (0 bytes allocated)
> 
> Welcome to Linux 2.4.18 (tty8)
  ...

I've been unable to reproduce the "!x123456" and its results, but it
doesn't seem a stack overflow. It seems that you've just run out of
memory, your shell has just tried to allocate some more 134 megabytes of
memory, couldn't, and bailed.

I would be more worried if you didn't get an error from the shell and just
a SIGSEGV or SIGILL.

Regards,
Luciano Rocha

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