CURRENT: llvm13 seem to miscompile dns/bind916 (9.16.23)

Reply: Daniel O'Connor via freebsd-current : "Re: CURRENT: llvm13 seem to miscompile dns/bind916 (9.16.23)"
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From: FreeBSD User <freebsd_at_walstatt-de.de>
Date: Thu, 25 Nov 2021 08:20:54 UTC

Running CURRENT (FreeBSD 14.0-CURRENT #7 main-n250911-a11983366ea7: Mon Nov 22 18:17:54
CET 2021 amd64) troubles me with our DNS server/service.
Aproximately the same time we switched on CURRENT to the CURRENT LLVM13 version and also,
after the compilation of a fresh OS with LLVM13, the upgrade from bind-9.16.22 to
bind-9.16.23 took place as well as ASLR being the default.

Since then named is crashing with a mysterious segmentation fault (see PR 259921,
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=259921).

Disabling ASLR as recommended to check whether ASLR triggers the SegFault did not solve
the problem, so I suspect a miscompilation due to llvm13.

On 13-STABLE bind-9.16.23 seem not to have this behaviour.

I'm floating like a dead man in the water, can someone help?

Kind regards,

oh