I could not reproduce the bug with the described method with kernel 4.4.0-81-generic and neither with 4.13.0-041300rc7-generic. 4.4.0-81 logged a hung tasks but does not Oops.
So the bug might have been reintroduced between 4.4.0-82 and 4.4.0-93 and 4.13 seems to contain a fix.
I could not reproduce the bug with the described method with kernel 4.4.0-81-generic and neither with 4.13.0- 041300rc7- generic. 4.4.0-81 logged a hung tasks but does not Oops.
So the bug might have been reintroduced between 4.4.0-82 and 4.4.0-93 and 4.13 seems to contain a fix.