r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x3, 0x0)
r1 = fcntl$dupfd(r0, 0x0, r0)
getsockopt$bt_BT_SNDMTU(r1, 0x112, 0xc, 0x0, &(0x7f0000000200))