Explicit Multi-consumer patterns
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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Samsung Galaxy S26+ (Verizon, 256GB)
经过两次车主爽约，我对返程坐顺风车已经不抱希望。情急之下，只能赶紧打开铁路购票App。运气还算不错，返程当天的二等座只剩3张，我手忙脚乱地选座、填信息、提交订单，付款成功的那一刻，悬着的心才落地。还好没被顺风车耽误返程，不然真不知道该怎么赶回去上班。