witness: lock order reversal: 1st 0xfffffd807ea9c258 fdlock (&newfdp->fd_fd.fd_lock) 2nd 0xfffffd807e880d60 inode (&ip->i_lock) lock order data w2 -> w1 missing lock order data w1 -> w2 missing Stopped at db_enter+0x18: addq $0x8,%rsp