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Zookeeper >> mail # user >> Zookeeper protocol weirdness and pure Python kazoo client


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Re: Zookeeper protocol weirdness and pure Python kazoo client
On Aug 30, 2012, at 4:00 PM, Ben Bangert <[EMAIL PROTECTED]> wrote:
> So far, I've found that if I send malformed Auth packets that are missing the auth_type int, after a few times I can get the Zookeeper server to segfault. I'll attach some more log scripts and a test script to trigger it next.

If you checkout the pure-python kazoo branch, this script will segfault Zookeeper immediately on my machine:
import logging

from kazoo.client import KazooClient
from kazoo.protocol.serialization import (
    Auth,
    write_buffer,
    write_string
)

logging.basicConfig(level=logging.DEBUG)
class BadAuth(Auth):
    type = 100

    def serialize(self):
        return (write_string(self.scheme) + write_buffer(self.auth))

k = KazooClient()
k.start()
k._queue.put((BadAuth(0, 'digest', 'user:password'), None))
It apparently really really doesn't like the fact that the auth_type is missing from the payload. A proper message length is provided though (for the admittedly malformed request), whatever Zookeeper is doing to read the buffer fails to account for the string being where it expected the int. Shouldn't this return a marshaling error?

- Ben