df3226 uid 1001: unauthorized ctl detach
[T 1220] ctl attach V(1219)
[D 1221] bystander writes detach to /proc/1219/ctl
[D] DETACH ACCEPTED with no authorization
[T] ctl step V #1 after interference: failed: Device busy
[T] ctl run V: failed: Device busy
df3226 done