I wonder if https://secure.ucc.asn.au/hg/dropbear/rev/c4f138dae2fd might help, if the problem is that write() is returning EAGAIN.
If you apply the patch https://secure.ucc.asn.au/hg/dropbear/rev/3873b39c4de6 the auth.log output should show why write() is failing.
I wonder if https:/ /secure. ucc.asn. au/hg/dropbear/ rev/c4f138dae2f d might help, if the problem is that write() is returning EAGAIN.
If you apply the patch https:/ /secure. ucc.asn. au/hg/dropbear/ rev/3873b39c4de 6 the auth.log output should show why write() is failing.