r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x3, 0x0)
r1 = dup2(r0, r0)
sendmsg$SEG6_CMD_SET_TUNSRC(r1, &(0x7f00000002c0)={0x0, 0x0, &(0x7f0000000280)={0x0}}, 0x81)