[Bug 54364] New: RtlGenRandom fails on systems with more than 128 cores

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=54364

Bug ID: 54364
           Summary: RtlGenRandom fails on systems with more than 128 cores
           Product: Wine
           Version: 8.0-rc5
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: advapi32
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

WinHttpSendRequest() fails with ERROR_OUTOFMEMORY when the
WINHTTP_OPTION_UPGRADE_TO_WEB_SOCKET is set on systems with 256 cores. I've
tracked it down to dlls/advapi32/crypt.c.

RtlGenRandom is implemented by calling
NtQuerySystemInformation(SystemInterruptInformation, ...) with a buffer
sufficient for the data from at most 128 CPUs. The buffer size is determined by
the #define in line 2393:

#define MAX_CPUS 128

Changing this line to

#define MAX_CPUS 256

make the problem go away for me, but the problem will probably return when
someone builds a system with even more cores. I would suggest implementing
RtlGenRandom() with a better source of randomness instead.