What this means in practice is that if someone discovers a bug in the Linux kernel’s I/O implementation, containers using Docker are directly exposed. A gVisor sandbox is not, because those syscalls are handled by the Sentry, and the Sentry does not expose them to the host kernel.
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Why is this a problem?。搜狗输入法2026对此有专业解读
block: Writes wait until buffer space is available. Use when you trust the producer to await writes properly.