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Re: bash -n: stack overflow in extract_delimited_string()
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From: |
Chet Ramey |
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Subject: |
Re: bash -n: stack overflow in extract_delimited_string() |
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Date: |
Mon, 3 Aug 2020 09:15:19 -0400 |
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User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 |
On 8/3/20 5:30 AM, Jakub Wilk wrote:
> Bash Version: 5.0
> Patch Level: 18
> Release Status: release
>
> bash crashes with stack overflow when checking syntax of this crafted script:
>
> $ ulimit -s
> 8192
>
> $ printf 'x[$(($(fi)))`\n%050000d\n][`]\n' | tr 0 '(' | bash -n
> bash: command substitution: line 4: syntax error near unexpected token `fi'
> bash: command substitution: line 4: `fi)))`'
> Segmentation fault
I can't reproduce this with bash-5.1-alpha.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU chet@case.edu http://tiswww.cwru.edu/~chet/