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

> On 25 Nov 2021, at 18:50, FreeBSD User <freebsd@walstatt-de.de> wrote:
> 
> 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?

lang/sdcc also seg faults (https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=260303), although there disabling ASLR via proccontrol does fix it.

Can you show a stacktrace for your seg fault?
--
Daniel O'Connor
"The nice thing about standards is that there
are so many of them to choose from."
 -- Andrew Tanenbaum