[Openais] [whitetank/corosync] Add boundary checking to IPC code

[Andrew Beekhof]

The previous patch had an incorrect comparision that broke anything
using flow control.
The new attachment has been verified to work correctly.

On Fri, Feb 13, 2009 at 10:38, Andrew Beekhof <abeekhof at suse.de> wrote:
> Corrupted messages could cause aisexec to segfault as their contents is used
> to index into an array.
> This patch looks for over and underflows while preserving the ability to
> save the program state to a core file.
>
> Please consider for whitetank and corosync.
>
> Andrew
>
>
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