In the absence of a reply to my question, I tried downloading various
binary kernels to at least narrow down the scope of the bisecting I'll
have to do. After trying older releases and having no failures, I
unexpectedly found that 14.04 kernels only cover 3.11 to 3.13. But I'm
running 14.04 and I'm on kernel 3.19?! It seems the 14.04.x updates
include kernels from newer releases. So this bug is much more recent
than I originally anticipated. How recent? Vivid recent.

Kernel 3.19.0-7 is good.
Kernel 3.19.0-51 is bad.

That cuts way down on the search space. I might try some more binary
kernels in this range while I sort out how to do source builds (in case
there are more commits than binaries - which is what I'm expecting).

I think this means I'll be able to download
git://kernel.ubuntu.com/ubuntu/ubuntu-vivid.git to get the appropriate
tags to bisect from. I found a hint to use fetch --depth=1, then fetch
--depth=1000, etc. to incrementally fetch a large repo.

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https://bugs.launchpad.net/bugs/1547838

Title:
  ADMtek ADM8511 "Pegasus II" USB Ethernet causes oops

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