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Linux eBPF & XDP Packet Processing Pipeline

6 questions · advanced

Test your understanding of eBPF register architecture, in-kernel verifier pointer bounds checking, native versus generic XDP driver hooks, packet buffer recycling, and per-CPU map concurrency.

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Why will the Linux in-kernel eBPF verifier reject an XDP program that attempts to dereference *(u32*)(data + 14) without a prior comparison against data_end?

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