FYI: msdu-desc must be multiple of 8.

Avery Pennarun apenwarr at
Tue May 13 15:42:58 PDT 2014

On Tue, May 13, 2014 at 6:34 PM, Ben Greear <greearb at> wrote:
> I just hit strange and wonderful crashes because I managed to use
> an msdu-desc length that was not an even multiple of 8.  Firmware
> has assumption (bug, really) about this.
> Bug is only triggerable if you fill up tx-descs, so have to flood UDP
> to hit easily.  I was trying 812 buffers, but 808 works just fine.
> (non CT firmware will not let you do less that 1024, no matter what you
> request, btw).

What chooses the msdu-desc length?  Is there a chance that this would
happen on an unmodified driver?


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