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Re: Bash regexp parsing would benefit from safe recursion limit
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From: |
Chet Ramey |
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Subject: |
Re: Bash regexp parsing would benefit from safe recursion limit |
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Date: |
Wed, 30 Mar 2022 14:07:51 -0400 |
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User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 |
On 3/30/22 11:16 AM, willi1337 bald wrote:
> Bash Version: 5.1
> Patch Level: 16
> Release Status: release
>
> Description:
>
> A deeply nested and incorrect regex expression can cause exhaustion of
> stack resources, which crashes the bash process.
Bash doesn't use it's own regexp engine; it uses whatever POSIX regexp
functions are provided by the C library (regcomp/regexec/regfree/regerror).
--
``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/