[Bug 92557] [3D Games] [HSW/BXT] Euro Truck simulator 2 stops unexpectedly when the game is loading

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92557

--- Comment #11 from Eero Tamminen <eero.t.tamminen at intel.com> ---
I'm able to reproduce crash with Ubuntu 16.04 on SKL.  Game crashes to memory
corruption:
- With Mesa 11.2 on Ubuntu 16.04 it crashes to SIGBUS in memcpy AVX version
- With Mesa git it crashes to Glibc assert that says "free(): corrupted
unsorted chunks".

Moving Steam's (Ubuntu 12.04) libstdc++ away so that system one is used didn't
help.  Neither did disabling all game MODs (Rocket League one was installed
automatically).

Because issue is memory corruption, any debugger backtraces are likely to be
completely useless, corruption has happened already earlier.  It needs a memory
debugger.

When I run the game under Valgrind, I get few warnings of code in the game
itself without any good backtraces, for:
- Use of uninitialised value of size 8
- Conditional jump or move depends on uninitialised value(s)

There were no warnings for Mesa.  Game doesn't crash with Valgrind though,
instead it freezes with 100% CPU usage in about same place at startup where it
crashed without Valgrind.

Game works most times when starting it in safe mode, but not always.  Changing
from safe mode to medium quality and full resolution almost always works
without crash.  Changing to high quality always crashes.  I.e. the corruption
bug is also somewhat random, which would indicate that it could be timing
related (e.g. missing locking in game).

This game has worked for me earlier (maybe year back) on HSW & BDW, but I've
never before tested it on SKL.  It may have been updated in the meanwhile (in
addition to updates for Mesa, distro & Steam).

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