Zbigniew Jędrzejewski-Szmek
052c57f132
We allocate a iovec entry for each field, so with many short entries, our memory usage and processing time can be large, even with a relatively small message size. Let's refuse overly long entries. CVE-2018-16865 https://bugzilla.redhat.com/show_bug.cgi?id=1653861 What from I can see, the problem is not from an alloca, despite what the CVE description says, but from the attack multiplication that comes from creating many very small iovecs: (void* + size_t) for each three bytes of input message.
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