Re: Infinite recursion makes bash segfault

[Chet Ramey]

On 5/5/22 7:10 AM, Judicaël Courant wrote:
> Hi,
>
> I found bash segfaults when running into an infinite recursion (details 
> below). I would expect it to either stop (or possibly exit) with a clear 
> error message instead. Here are the details (as given by bashbug). The 
> problem also happens with the latest bash version (5.2.0(1)-beta).

Yes. If you recurse indefinitely, you will eventually exceed your stack
size resource limit and get the prescribed fatal signal.

> Description:
>          Infinite recursion causes bash to segfault.
>          The problem happens in interactive mode as well as in scripts.
>
> Repeat-By:
>          ~$ bash
>          ~$ foo () { foo; }; foo
>          Segmentation fault (core dumped)
>          ~$

If you are worried about this, set the FUNCNEST shell variable to an
appropriate value.

--
``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/