• Vladimír Čunát's avatar
    daemon TCP to upstream: don't send wrong message length · 10a113d7
    Vladimír Čunát authored
    See the added comments.  Such bugs are tricky, because the old code
    would typically work just fine, only if libuv/OS decided to postpone
    copying the data (perhaps large load), we would send two bytes from
    this address on C stack - their later value (hard to predict what).
    Security risks: the two bytes might theoretically contain information
    that was more or less private and we just send it to some DNS server
    (possibly over unencrypted TCP), but ATM I find it very unlikely that
    this bug could be practically exploited.
worker.c 58 KB