Let's add some extra validation before constructing and using the .so name to load. This isn't really security sensitive, given that we used secure_getenv() to get the device string (and it thus should have been come from a trusted source) but let's better be safe than sorry. (cherry picked from commit 50a085143fa8f5dd6b6b3cef8a6ea2ec7c53ed0d) (cherry picked from commit 542dbc623e00d55224db30280d90f48d51cdf8f8)
System and Service Manager
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