Bug#1152832: Segmentation fault in Perl_csighandler3 when used XS with threads (i.e. pango/fontcon)

[Niko Tyni]

Control: forwarded -1 https://github.com/Perl/perl5/issues/22487
Control: tag -1 trixie upstream patch
Control: close -1 5.42.0-1

On Sun, Nov 01, 2026 at 09:13:52PM +0100, Bernhard Schmidt wrote:
> Source: perl
> Version: 5.40.1-6
> Severity: important
 
> I don't understand the gory details, but I think the analysis comes from a
> trustworthy side and I'm forwarding it to get some visibility. I'm not
> sure it's directly backportable to stable either. Maybe there is a
> stable release branch for Perl 5.40 somewhere?

Hi, thanks for filing this.

There is a indeed such a branch at

  https://github.com/Perl/perl5/tree/maint-5.40

but upstream only offers security fixes for 5.40 at this point, see

  https://github.com/Perl/perl5/blob/blead/pod/perlpolicy.pod

That said, the fix at

  https://github.com/Perl/perl5/commit/85e97066288fa0be7b08897c6306e33ea2ef45d7

applies cleanly to 5.40, so it may be feasible to backport this for
trixie anyway.

I'll see if I can get it in a future point update.
-- 
Niko