Bug#854281: Crash because of NULL pointer dereference in `pick_next_task_fair`

Hi, I also encountered this bug randomly three times on the last 2 months, on two servers (Linux x 3.16.0-6-amd64 #1 SMP Debian 3.16.56-1+deb8u1 (2018-05-08) x86_64 GNU/Linux), same hardware (I can share if needed), mainly running Apache, Docker and VirtualBox (Windows guests). They are

Bug#854281: Crash because of NULL pointer dereference in `pick_next_task_fair`

Package: linux-image-3.16.0-4-amd64 Version: 3.16.39-1 Severity: important Dear Debian folks, Linux 3.16.39 and earlier crash almost daily with the trace below. ``` Feb 04 10:05:58 fujitsu01 kernel: BUG: unable to handle kernel NULL pointer dereference at 0078 Feb 04 10:05:58