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docs: add docs for sm permissive unregistration

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misson20000 2018-12-20 19:25:13 -08:00
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docs/modules/sm.md
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@ -67,3 +67,7 @@ By default, the Stratosphere implementation of PM will raise any session limits
### Weak Service Verification
In system firmware versions before 3.0.1, if a process did not call the [Initialize](https://reswitched.github.io/SwIPC/ifaces.html#nn::sm::detail::IUserInterface(0)) command on its `sm:` session, normally used to inform sm of the process's identity, sm would assume that the process was a kernel internal process and skip any service registration or access checks. The Stratosphere implementation of sm reimplements this vulnerability, allowing homebrew processes to skip service registration and access checks.
### Permissive Unregistration
Stock sm ensures that a service may only be unregistered by the service that registered it, or a built-in. This requirement has been removed so that a service may be unregistered by any process.