$ /tmp/fionread_rdwr            # unprivileged user, stock kernel #0
FIONREAD on O_RDWR fd = 0 (expected 5)
FIONREAD on O_RDONLY fd = 5 (control, expected 5)
BUG-DF-3163: O_RDWR FIONREAD clobbered by the write-socket pass
VERDICT: reproduced
rc=0