Re: GNU Bison obprintf.c Assertion Failure

Florian Weimer <[email protected]> Thu, 04 Sep 2025 17:24:58 +0200
Newsgroups gmane.comp.parsers.bison.bugs
Message-ID <[email protected]>
* Collin Funk:

> VulnDB send a screenrecording from the original reporter where they ran
> 'bison' with all the POC files. They all Segmentation Fault, no failed
> assertions or anything like the original report say.

Oh.

Thanks for looking into this.

> Also, I realize now that obprintf.c is a glibc file. Gnulib (which is
> imported into Bison) only has obstack.c and obstack_printf.c.

Right, and the obstack_printf code in glibc was rewritten a while ago,
and the quoted assert is no longer there.

Florian