I was able to reproduce this bug. The panic not only happens at install time, but also if you install the affected kernel on an already installed system.
I'm in the process of bisecting the issue now. The bug also exists in upstream 4.2 final.
* Panic happens with latest Vivid kernel(3.19.0-28)
* Does not happen with 3.19.0-15
* Does not happen with upstream 3.19.8-ckt6
* Panic happens with upstream 4.2.
I was able to reproduce this bug. The panic not only happens at install time, but also if you install the affected kernel on an already installed system.
I'm in the process of bisecting the issue now. The bug also exists in upstream 4.2 final.
* Panic happens with latest Vivid kernel(3.19.0-28)
* Does not happen with 3.19.0-15
* Does not happen with upstream 3.19.8-ckt6
* Panic happens with upstream 4.2.
I'll update the bug with my progress.