I just upgraded to 4.4.0-91 from the main repository, and it boots
All my virtual machines are running too.
Looks like this is fixed in something which was changed between -89 and
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Kernel 4.4.0-89 panics on boot on xenial
Status in linux package in Ubuntu:
After applying the 4.4.0-89 kernel update, I get a panic on boot.
4.4.0-87 boots normally.
I expected that 4.4.0-89 would boot normally (as 4.4.0-87) instead of
Systemd displays an announcement: "Starting udev Wait for Complete Device
Initialization...", then I get:
* "kobject: can not set name properly!"
* "BUG: unable to handle kernel null pointer dereference at 00000000
* A kernel error backtrace
Part of the backtrace is (I'm having to enter this from a video):
RIP [ffffffff811ed65b] kmem_cache_alloc_trace+0x7b/0x1f0
Kernel panic - not syncing: CRED: put_cred_rcu() sees ffff880231fc3cc0
with usage -1
Description: Ubuntu 16.04.3 LTS
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