$ /tmp/revoke_fifo_noop          # unprivileged user (uid=1001), stock kernel #0
fifo opened: rfd=3 wfd=4 (uid=1001)
revoke(/tmp/df3162_fifo) returned 0 (owner is allowed to revoke)
BUG-DF-3162: fds still functional after revoke(2) (data rfd<->wfd still flows)
VERDICT: reproduced
rc=0