[Bug 49782] Elite Dangerous Horizons: crashes with wine64 5.16

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=49782

Paul Gofman <pgofman at codeweavers.com> changed:

           What    |Removed                     |Added
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                 CC|                            |pgofman at codeweavers.com

--- Comment #6 from Paul Gofman <pgofman at codeweavers.com> ---
I've tested the game. The failing sequence is:

1. Application calls WaitForMultipleObjects().
2. select wineserver call in ntdll/unix/server.c:server_select() first gets
STATUS_KERNEL_APC for APC_ASYNC_IO/.
3. The async IO callback is WS2_async_recv, which currently calls into ntdll
through syscall thunks. This effectively resets syscall frame to NULL.
4. next select wineserver call returns STATUS_USER_APC. invoke_apc() called
from server_wait() crashes because of NULL syscall frame.

The problem is in step 3, the async callbacks are not supposed to make calls
through syscall thunks. AFAIK the move of those callbacks into ntdll.so is
being worked on, this bug should be fixed once that is complete.

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