Comment 43 for bug 1518457

Sorry for commenting in the middle of your ongoing work, but I struggle matching your findings to my own.

Just like Sam and Sean reported, I see the bug on EC2 t2.micro running 15.10. I can reproduce it on t2.small as well, but it takes a little longer as I have to exaust the free memory. I've installed several instances with different Ubuntu versions keeping everything the same. I only observe this bug on Ubuntu 15.10

All versions running the latest security updates:
14.04 (3.13.0-74): OK
15:04 (3.19.0-43): OK
15:10 (4.2.0-22): Not OK

If I understand the comments correctly, the hypothesis is that the bug was introduced between 3.12 final and 3.13-rc1. To me it seems to have been introduced between 3.19.0-43 and 4.2.0-22.

Is that worth double checking?