Ubuntu
linux package

  1. Bug #1627198
  2. Comment #51

Comment 51 for bug 1627198

Revision history for this message
Seth Forshee (sforshee) wrote : Re: [Bug 1627198] Re: 4.8.0 kernels do not complete boot process on VM

> Can you say whether it's the second problem that was breaking the desktop
> coming up on login? IOW, I observed two problems. One was a freeze during
> the boot process, and the other was a freeze during the login process
> (although the latter wasn't a total freeze, as ssh still worked).

As far as I can tell from the history here,
CONFIG_HARDENED_USERCOPY_PAGESPAN was responsible for the desktop not
coming up. Having the "rewind the stack before do_exit()" patch in
combination with that option prevented booting, becuase the usercopy
hardening created an oops that triggered the code paths affected by the
patch (but I'm still not sure what about that patch caused boot to
hang).