Comment # 74 on bug 1105271 from Borislav Petkov

Created attachment 780667 [details]
test patch 2

Ok, looks like that jump label call hangs somewhere. Looking at
upstream, we don't have

  d0646a6f5533 ("jump_label: Add RELEASE barrier after text changes")

so here's an updated patch.

Also, do you have lockdep enabled?

If not, please enable CONFIG_DEBUG_LOCK_ALLOC and CONFIG_PROVE_LOCKING and do
the exact same test as before.

Thx.