SYZFAIL: too much cover
thr=0, cov=1864135 (errno 14: Bad address)
SYZFAIL: child failed
 (errno 0: No error: 0)
if_delmulti_locked: detaching ifnet instance 0xfffffe009f0bb000
if_delmulti_locked: detaching ifnet instance 0xfffffe009f0bb000
if_delmulti_locked: detaching ifnet instance 0xfffffe009f0bb000