[Bug 48482] New: Star Wars Knights of the Old Republic randomly crashes after failed malloc

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=48482

            Bug ID: 48482
           Summary: Star Wars Knights of the Old Republic randomly crashes
                    after failed malloc
           Product: Wine
           Version: 5.0-rc6
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: winelib
          Assignee: wine-bugs at winehq.org
          Reporter: info at fdossena.com
      Distribution: ArchLinux

Created attachment 66272
  --> https://bugs.winehq.org/attachment.cgi?id=66272
winedbg output of the crash

I'm trying to play Star Wars Knights of the Old Republic (KOTOR, for short) and
the game randomly crashes on loading screens when played in Wine.

The crash is a null pointer exception (see attached kotorcrash.txt). Nothing
special appears in the terminal, the crash was captured using winedbg.

The issue can be easily replicated by saving in front of a loading door and
going back and forth a few times. It usually happens after 5-10 loads, so
during normal gameplay the game crashes every 30 minutes or so, depending on
the area.

My reverse engineering skills are minimal, but I know how to use IDA a bit, so
I took a peek at the offending code with it (see attached isassembled.png). The
instruction can be reached from 2 paths, one of which contains a malloc that I
think is failing and returning 0. Why it fails I cannot tell. I tried placing a
breakpoint but it gets called too often to be able to play the game (I need
some way to break only if it returns 0, but I don't know how to do it).

I think malloc is part of winelib, so I chose that as the component for this
bug report, if it's wrong please move it to the correct section.

I am willing to help you debug the issue further if you can tell me exactly
what do to. I can also provide game files or saved games to replicate the issue
if you contact me via email.


Software:
* Manjaro Linux 18.1.5 KDE x86-64 (also tested on Ubuntu 19.10)
* KOTOR version 1.0.3 from GOG (also tested with Steam and disc versions)
* Wine version 5.0-rc6 built from source (also tested with 4.0.3 stable,
5.0-rc2 and 5.0-rc2 staging from package manager)

Hardware 1:
* AMD Athlon 300G
* 8GB DDR4
* AMD RX Vega 3 graphics (using open source amdgpu driver)

Hardware 2:
* Intel Core i9 9900k
* 64GGB DDR4
* nVidia GTX 1080 (using both the open source nouveau driver and the
proprietary one)

I've also tried playing in software rendering using Mesa Gallium on LLVMPipe,
the issue was still present.
Note: the game currently doesn't work on Intel graphics due to driver issues.

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