[Bug 2089779] Re: Buffer overflow in autopkgtest of wesnoth

[Christian Ehrhardt ]

I could now, knowing that it is O3+LTO also reproduce it with upstream
git :-)

I checked the former 2.30.6 which would also behave the same way if LTO
and O3 are enabled, so at the end it wasn't the new version of libsdl2
at all.

I submitted it to upstream for their awareness.

Reproducible builds:
- https://github.com/libsdl-org/SDL/issues/11565
- https://github.com/libsdl-org/SDL/pull/11566

LTO+O3 crash:
- https://github.com/libsdl-org/SDL/issues/11567

The options now are fixing it (if upstream wants and can) or disabling LTO or O3.
I've asked Foundations/Doko which they prefer.

Once we know which way we should fix this, we can try and upload with
that.

** Bug watch added: github.com/libsdl-org/SDL/issues #11565
   https://github.com/libsdl-org/SDL/issues/11565

** Bug watch added: github.com/libsdl-org/SDL/issues #11567
   https://github.com/libsdl-org/SDL/issues/11567

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https://bugs.launchpad.net/bugs/2089779

Title:
  Buffer overflow in autopkgtest of wesnoth

Status in boost1.83 package in Ubuntu:
  Fix Released
Status in libsdl2 package in Ubuntu:
  Confirmed
Status in python3-defaults package in Ubuntu:
  Fix Released
Status in wesnoth package in Ubuntu:
  Triaged
Status in wesnoth-1.18 package in Ubuntu:
  Triaged

Bug description:
  https://objectstorage.prodstack5.canonical.com/swift/v1/AUTH_0f9aae918d5b4744bf7b827671c86842/autopkgtest-
  plucky/plucky/amd64/w/wesnoth-1.18/20241127_064901_ac814@/log.gz

  Repeats on reruns triggered by others.
  Blocks multiple migrations, atm
  - libsdl2
  - python3-defaults
  - boost1.83

  Unblocking all of these is surely worth it :-)
  I'll have a look tomorrow.

  229s autopkgtest [06:48:46]: test command1: /usr/games/wesnoth-1.18 -m --controller 1:ai --controller 2:ai --nogui
  229s autopkgtest [06:48:46]: test command1: [-----------------------
  229s Battle for Wesnoth v1.18.3 x86_64
  229s Started on Wed Nov 27 06:48:46 2024
  229s 
  229s Automatically found a possible data directory at: /tmp/autopkgtest.kgIWzV/build.Cyz/src
  229s 
  229s Data directory:               /tmp/autopkgtest.kgIWzV/build.Cyz/src
  229s User configuration directory: /home/USER/.config/wesnoth-1.18
  229s User data directory:          /home/USER/.config/wesnoth-1.18
  229s Cache directory:              /home/USER/.config/wesnoth-1.18/cache
  229s 
  229s 
  229s error: XDG_RUNTIME_DIR is invalid or not set in the environment.
  229s *** buffer overflow detected ***: terminated
  230s Aborted (core dumped)

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