The Sentry intercepts the untrusted code’s syscalls and handles them in user-space. It reimplements around 200 Linux syscalls in Go, which is enough to run most applications. When the Sentry actually needs to interact with the host to read a file, it makes its own highly restricted set of roughly 70 host syscalls. This is not just a smaller filter on the same surface; it is a completely different surface. The failure mode changes significantly. An attacker must first find a bug in gVisor’s Go implementation of a syscall to compromise the Sentry process, and then find a way to escape from the Sentry to the host using only those limited host syscalls.
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，这一点在51吃瓜中也有详细论述
Each moment of horror is a fragment of the destruction wrought by an atmospheric machine-gun that in recent weeks has fired storm after storm at the western Mediterranean. Scientists do not know if climate breakdown helped pull the trigger, but research suggests it loaded the chamber with bigger bullets.
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