Why is there an unexpected reboot for Docker services during high workload

Compute hosts running Docker services reboot unexpectedly due to kernel panic.

The following kernel patch addresses this issue:

Title: blkcg: fix use-after-free in __blkg_release_rcu() by making blkcg_gq refcnt an atomic_t.

Commit number: a5049a8ae34950249a7ae94c385d7c5c98914412 upstream.

For more information, see https://www.kernel.org/pub/linux/kernel/v3.0/ChangeLog-3.14.12. This patch is included in kernel 3.14.12.