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From: "pieterjan.briers at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug dynamic-link/28937] New DSO dependency resolver buggyness with
 dlclose()
Date: Sun, 14 Aug 2022 20:06:50 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D28937

--- Comment #8 from Pieter-Jan Briers <pieterjan.briers at gmail dot com> -=
--
I made an Arch Linux VM image that reliably reproduces the bug, in the hope
that it helps debugging. It's about 800 MB XZ-compressed, 3.7 GB without. I
made the VM in Hyper-V and converted the .vhdx to .qcow2 in WSL2 though, so=
 I
hope that didn't break anything.

Here's the file: https://central.spacestation14.io/ArchText.qcow2.xz
Login is just root with password "root". Both the broken and working versio=
ns
of the sample code (one with the fluidsynth load commented out) are include=
d in
the /root.=20

One of the commenters on the downstream Arch issue mentioned they ran valgr=
ind
and it was *not* happy, and I can definitely confirm this. I didn't try run=
ning
valgrind before making the VM image though, and I didn't want to sit through
another 10 minutes of xz compressing a massive file, so here's the instruct=
ions
to get valgrind set up:

pacman -S valgrind debuginfod
export DEBUGINFOD_URLS=3D"https://debuginfod.archlinux.org" # Necessary bec=
ause
of https://bbs.archlinux.org/viewtopic.php?id=3D276422
valgrind --leak-check=3Dyes ./broken

Valgrind does complain about some stuff in the audio libraries themselves, =
but
there is still noticeably a couple errors inside dlclose() itself.

--=20
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