https://bugs.winehq.org/show_bug.cgi?id=46472
--- Comment #30 from Anthony Jagers noonetinone@gmail.com --- Update, I have received a flurry of emails since I CC'ed the five maintainers of the source file.
I'll just quote what two unnamed individuals have wrote.
there's a post with simple test code showing what the fix aimed for: https://lore.kernel.org/lkml/tip-9b3579fc6c6ac45502de1fa9a1fdf873805c2157@gi...
it might help narow down the potential issue in set_thread_context
Someone with access to the app will need to investigate what it's doing, specifically how it's trying to set the debug registers and why the values that it's setting are causing different behavior with that kernel change. Getting an strace of the wineserver process would probably help, or else adding printfs to all the PTRACE_PEEKUSER/POKEUSER calls in server/ptrace.c.
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Well that's something.