Comment 3 still shows the taint due to machine check exception. Comment 4 doesn't have that anymore, so that's out of the way.
Gentoo tracks a different forcedeth related bug: https://bugs.gentoo.org/188767
The first attachment of this bug contains test code (a server and a client). Maybe you can use this to get a test case together for your bug.
Comment 3 still shows the taint due to machine check exception. Comment 4 doesn't have that anymore, so that's out of the way.
Gentoo tracks a different forcedeth related bug: https:/ /bugs.gentoo. org/188767
The first attachment of this bug contains test code (a server and a client). Maybe you can use this to get a test case together for your bug.