r1q2 crashing when loading anticheat

[Gouki]

Sometimes, when I try to join a server, after the message loading anticheat, my R1Q2 crashes. This doesn't happen all the time but it has only started happening recently. How do I solve this problem?

I have not changed anything from when it worked flawlessly, it just happened.

[SquiSHeR]

well, I've got the same problem. Its happening in about 90% of the cases when I join a server, within 1-2 seconds after anticheat is loaded.

Anticheat seems to be no longer under active development.- maybe we should just get rid of it.

[R1CH]

What Windows version? R1GL has issues with Win8 from what I've heard.

[SquiSHeR]

Hello R1CH, nice to see you still care about Q2!
as you predicted - I get this error on Windows 8.1

[noah]

I get this too (Win 8.1, all manner of compat modes), and it's almost 100% of connections, a couple of seconds after spawning. Long enough to move a few feet and get fragged by Optica if he's on, but that's about it. I've only gotten a game or two since TS required anticheat recently. I was actually scouring the forums for the tenth time last night when I noticed a new post here, so I'm glad to see you are listening, r1ch.

I've attached a debugger before connecting (and loading anticheat). When using both ref_gl and ref_r1gl, the result is the same:


    Unhandled exception at 0x66BD0A50 (anticheat.dll) in r1q2.exe: 0xC0000005: Access violation writing location 0xFFFFFFE5.

    r1q2.exe is 8.0.1.2
    ref_r1gl.dll is 0.1.5.41


I'm not sure whether this is happening during LoadLibrary, Initialize, or somewhere soon after. There are two breakpoints triggered during the LoadLibrary call, then the access violation is thrown. A partial stack as of the second breakpoint is below. I couldn't get anything useful by breaking at the exception throw. I do have dumps if that would be useful, and I'm willing to jump in and help debug this, but I can't make much more progress without at least a PDB.

Since the rendering, input, and sound start up before crash (after blocking on loading anticheat), and every so often, the crash does not happen, it seems to be somewhere down the line. That is, the client_connect section of CL_ConnectionlessPacket would seem to be completing.

>   anticheat.dll!66bd02c1()   Unknown
    [Frames below may be incorrect and/or missing, no symbols loaded for anticheat.dll]   
    ntdll.dll!_LdrxCallInitRoutine@16()   Unknown
    ntdll.dll!LdrpCallInitRoutine()   Unknown
    ntdll.dll!LdrpInitializeNode()   Unknown
    ntdll.dll!LdrpInitializeGraph()   Unknown
    ntdll.dll!LdrpPrepareModuleForExecution()   Unknown
    ntdll.dll!LdrpLoadDll()   Unknown
    ntdll.dll!LdrLoadDll()   Unknown
    KernelBase.dll!_LoadLibraryExW@12()   Unknown
    KernelBase.dll!_LoadLibraryExA@12()   Unknown
    kernel32.dll!LoadLibraryA()   Unknown
    r1q2.exe!@Sys_GetAntiCheatAPI@0()   Unknown
    r1q2.exe!@CL_ConnectionlessPacket@0()   Unknown
    r1q2.exe!@CL_ReadPackets@0()   Unknown

[Muerte]

just go back on 7904 r1q2 version and dont use anticheat.dll with Windows 8.1

[noah]

Anticheat is required on the servers I'd like to use (TS DM), and I'm interested in moving toward a fix.

With some twiddling with EMET, I disabled mandatory ASLR and bottom-up ASLR, and that did not resolve the issue. It was catching "ROP Caller Check" and "ROP Simulate Execution Flow", so I disabled them as well -- and I'm back to the access violation crash. I'd have to guess there is a magic number or unsafe address calculation going on that is only correct once in a great while.

[quadz]

Anticheat is required on the servers I'd like to use (TS DM), and I'm interested in moving toward a fix.

AC isn't globally required on our servers, but it is forced in certain subnets where problematic players have connected from.

In your case, the restricted zone seems obsolete. The player it was meant for was last in that subnet 2400+ days ago.

I'll look into clearing old entries in the banfile that appear no longer relevant.


Regards,

quadz

[noah]

Thanks, quadz. I'll keep an eye on that and also try to help r1ch along toward a general fix.

[R1CH]

I've tried to diagnose this in a Win 8 VM but have been unable to reproduce any crashes. I'm guessing I need a hardware accelerated rendering context to trigger whatever is causing it.

[SquiSHeR]

Hey R1CH, any news on this? I guess it could be very well related to the opengl subsystem