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Commit cdfe9a3a authored by Martin Holst Swende's avatar Martin Holst Swende Committed by Felix Lange
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eth, les: add sanity checks for unbounded block fields (#19573)

This PR adds some hardening in the lower levels of the protocol stack, to bail early on invalid data. Primarily, attacks that this PR protects against are on the "annoyance"-level, which would otherwise write a couple of megabytes of data into the log output, which is a bit resource intensive.
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