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404oops
404oops@oops4041555·
Here's what I understood and why I issued a retraction: 1. Riot uses IOMMU protection to only isolate its game's memory addresses from other devices 2. Just that.
Riot Games@riotgames

Does Vanguard physically damage hardware? No. Does this impact hardware or software in any ways unrelated to Riot’s games? No. The IOMMU security protection does not impact hardware, and would only impact the ability of players using DMA cheat devices to play our games. Are normal players affected? Players not using DMA cheat hardware are unaffected. Why target DMA cheats? DMA-based cheats are among the most sophisticated forms of cheating because they attempt to bypass traditional software detection by accessing memory directly through external hardware. I’m affected by this. How do I fix it? To continue cheating in other titles with this device, you may simply disable IOMMU in BIOS in the same place that you enabled it. Of course, you still won’t be able to play our games with these cheat devices enabled. Why did Riot joke about “bricking” PCs? We didn’t. The “paperweight” comment was about VALORANT cheat devices that no longer work in VALORANT. No hardware is being damaged and no other functionalities are impacted.

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Chris Blume
Chris Blume@ProgramMax·
@oops4041555 I think IOMMU is a full on/off. I don't think you can selectively apply IOMMU to just some memory/devices, right? IOMMU has overhead (TLB misses). IIUC, Riot will only force IOMMU on computers where it detects the DMA cheating. So legit players should be fine.
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Edhie
Edhie@Dehiemi·
@ProgramMax @oops4041555 and yet people fail to understand that, still that riot only has access to memory readings not writings, they think their pc will break when it only breaks if your cheats are trying to modify the system to make it work, people is really stupid.
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Chris Blume
Chris Blume@ProgramMax·
@Dehiemi @oops4041555 Riot's Vanguard is kernel-level. It has full access to everything (except hypervisor). Reading, writing, you name it. When you type in your password to your bank account, Riot is watching that. Kernel-level is an arms race thing. It's scorched earth.
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Chris Blume
Chris Blume@ProgramMax·
@xdNeon1 @Dehiemi @oops4041555 Ehhhh yes and no. You are right that any program run as User A can read memory from other programs run by User A. But it can't read User B memory. And it has to get permission from the kernel to read memory from those other programs. You can deny that. This is how DRM works.
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Chris Blume
Chris Blume@ProgramMax·
@xdNeon1 @Dehiemi @oops4041555 Open Chrome, sign into Netflix, play a movie, screenshot it (win+shift+s). You'll see it is all black instead of the video. Because Chrome enables DRM there.
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