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Groups > gnu.bash.bug > #14382 > unrolled thread

Re: v4.4 segfault in 'decode_prompt_string' when processing special parameter

Started byChris Schoenberg <chris@cr0ssbyte.com>
First post2018-07-21 17:11 -0500
Last post2018-07-21 17:11 -0500
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  Re: v4.4 segfault in 'decode_prompt_string' when processing special parameter Chris Schoenberg <chris@cr0ssbyte.com> - 2018-07-21 17:11 -0500

#14382 — Re: v4.4 segfault in 'decode_prompt_string' when processing special parameter

FromChris Schoenberg <chris@cr0ssbyte.com>
Date2018-07-21 17:11 -0500
SubjectRe: v4.4 segfault in 'decode_prompt_string' when processing special parameter
Message-ID<mailman.3997.1532211135.1292.bug-bash@gnu.org>
The payload got filtered, so here it is again (substitute the actual
character for [at]):

$\{_[at]P};${_[at]P}

On Sat, Jul 21, 2018, 1:47 PM Chris Schoenberg wrote:

> This only works in 4.4; earlier versions throw a 'bad substitution' error. It
> causes an infinite loop of calls between 'expand_prompt_string' and 'decode_prompt_string',
> where calls to 'xmalloc' exhaust the heap:
>
...
>

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