Bug#896878: Info received (Bug#896878: Failed to execute /init (error -2) Kernel panic)

[Андрей Василишин]

I don't know what helped out of this.

# apt-get install --reinstall linux-image-4.9.0-6-amd64 
linux-image-amd64 sysvinit-core

# upgrade-from-grub-legacy

But now kernel 4.9.82-1+deb9u3 loading normally